Renesas M38045FALKP Single-chip 8-bit cmos microcomputer Datasheet

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April 1st, 2010
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3804 Group (Spec.L)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
DESCRIPTION
The 3804 group (Spec.L) is the 8-bit microcomputer based on the
740 family core technology.
The 3804 group (Spec.L) is designed for household products,
office automation equipment, and controlling systems that
require analog signal processing, including the A/D converter
and D/A converters.
FEATURES
• Basic machine-language instructions ................................. 71
• Minimum instruction execution time .......................... 0.24 μs
(at 16.8 MHz oscillation frequency)
• Memory size
ROM (Flash memory) ............................................ 60 K bytes
RAM ...................................................................... 2048 bytes
• Programmable input/output ports ....................................... 56
• Software pull-up resistors ............................................ Built-in
• Interrupts
21 sources, 16 vectors...............................................................
(external 8, internal 12, software 1)
• Timers ...................................................................... 16-bit × 1
8-bit × 4
(with 8-bit prescaler)
• Serial interface ......... 8-bit × 2 (UART or Clock-synchronized)
8-bit × 1 (Clock-synchronized)
• PWM ....................................... 8-bit × 1 (with 8-bit prescaler)
• A/D converter ........................................ 10-bit × 16 channels
(8-bit reading enabled)
• D/A converter ............................................ 8-bit × 2 channels
• Watchdog timer ....................................................... 16-bit × 1
• Multi-master I2C-BUS interface.............................. 1 channel
• LED direct drive port............................................................. 8
• Clock generating circuit ............................. Built-in 2 circuits
(connect to external ceramic resonator or quartz-crystal oscillator)
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• Power source voltage
[In high-speed mode]
At 16.8 MHz oscillation frequency .................... 4.5 to 5.5 V
At 12.5 MHz oscillation frequency .................... 4.0 to 5.5 V
At 8.4 MHz oscillation frequency ...................... 2.7 to 5.5 V
[In middle-speed mode]
At 16.8 MHz oscillation frequency .................... 4.5 to 5.5 V
At 12.5 MHz oscillation frequency .................... 2.7 to 5.5 V
[In low-speed mode]
At 32 kHz oscillation frequency......................... 2.7 to 5.5 V
• Power dissipation
In high-speed mode ........................................ 27.5 mW (typ.)
(at 16.8 MHz oscillation frequency, at 5 V power source voltage)
In low-speed mode ........................................ 1200 μW (typ.)
(at 32 kHz oscillation frequency, at 3 V power source voltage)
• Operating temperature range ............................. −20 to 85 °C
• Packages
SP...............PRDP0064BA-A (64P4B) (64-pin 750 mil SDIP)
HP ......PLQP0064KB-A (64P6Q-A) (64-pin 10 × 10 mm LQFP)
KP ......PLQP0064GA-A (64P6U-A) (64-pin 14 × 14 mm LQFP)
WG ........PTLG0064JA-A (64F0G) (64-pin 6 × 6 mm FLGA)
<Flash memory mode>
• Power source voltage ................................ VCC = 2.7 to 5.5 V
• Program/Erase voltage ............................. VCC = 2.7 to 5.5 V
• Programming method ............... Programming in unit of byte
• Erasing method ................................................. Block erasing
• Program/Erase control by software command
• Number of times for programming/erasing ...................... 100
APPLICATION
Camera, Household appliance, Consumer electronics, etc.
P00/AN8
P01/AN9
P02/AN10
P03/AN11
P04/AN12
P05/AN13
P06/AN14
P07/AN15
P10/INT41
P11/INT01
P12
P13
P14
P15
P16
P17
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
3804 Group (Spec.L)
P37/SRDY3
49
32
P20(LED0)
P36/SCLK3
50
31
P21(LED1)
P35/TXD3
51
30
P22(LED2)
P34/RXD3
52
29
P23(LED3)
P33/SCL
53
28
P24(LED4)
P32/SDA
54
27
P25(LED5)
P31/DA2
55
26
P26(LED6)
P30/DA1
56
25
P27(LED7)
VCC
57
24
VSS
VREF
58
23
XOUT
AVSS
59
22
XIN
P67/AN7
60
21
P40/INT40/XCOUT
P66/AN6
61
20
P41/INT00/XCIN
P65/AN5
62
19
RESET
P64/AN4
63
18
CNVSS
P63/AN3
64
17
P42/INT1
8
9
10
11
12
13
14
15
P53/SRDY2
P52/SCLK2
P51/SOUT2
P50/SIN2
P47/SRDY1/CNTR2
P46/SCLK1
P45/TXD1
P44/RXD1
16
7
P54/CNTR0
P43/INT2
6
4
P57/INT3
P55/CNTR1
3
P60/AN0
5
2
P61/AN1
P56/PWM
1
P62/AN2
M38049FFLHP/KP
Package code : PLQP0064KB-A (64P6Q-A)/PLQP0064GA-A (64P6U-A)
Fig. 1
Pin configuration (Top view) PLQP0064KB-A (64P6Q-A)/PLQP0064GA-A (64P6U-A)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
M38049FFLSP
VCC
VREF
AVSS
P67/AN7
P66/AN6
P65/AN5
P64/AN4
P63/AN3
P62/AN2
P61/AN1
P60/AN0
P57/INT3
P56/PWM
P55/CNTR1
P54/CNTR0
P53/SRDY2
P52/SCLK2
P51/SOUT2
P50/SIN2
P47/SRDY1/CNTR2
P46/SCLK1
P45/TXD1
P44/RXD1
P43/INT2
P42/INT1
CNVSS
RESET
P41/INT00/XCIN
P40/INT40/XCOUT
XIN
XOUT
VSS
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
P30/DA1
P31/DA2
P32/SDA
P33/SCL
P34/RXD3
P35/TXD3
P36/SCLK3
P37/SRDY3
P00/AN8
P01/AN9
P02/AN10
P03/AN11
P04/AN12
P05/AN13
P06/AN14
P07/AN15
P10/INT41
P11/INT01
P12
P13
P14
P15
P16
P17
P20(LED0)
P21(LED1)
P22(LED2)
P23(LED3)
P24(LED4)
P25(LED5)
P26(LED6)
P27(LED7)
Package code : PRDP0064BA-A (64P4B)
Fig. 2
Pin configuration (Top view) (PRDP0064BA-A (64P4B))
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 2 of 128
3804 Group (Spec.L)
PIN CONFIGURATION (TOP VIEW)
A
8
7
6
5
4
3
2
1
B
C
D
E
F
G
H
50
46
44
41
40
32
31
30
P36/SCLK3
P02/AN10
P04/AN12
P07/AN15
P10/INT41
P20(LED0)
P21(LED1)
P22(LED2)
51
47
45
42
39
27
29
28
P35/TXD3
P01/AN9
P03/AN11
P06/AN14
P11/INT01
P25(LED5)
P23(LED3)
P24(LED4)
53
52
48
43
38
37
26
25
P33/SCL
P34/RXD3
P00/AN8
P05/AN13
P12
P13
P26(LED6)
P27(LED7)
56
55
54
49
33
36
35
34
P30/DA1
P31/DA2
P32/SDA
P37/SRDY3
P17
P14
P15
P16
1
64
58
59
57
24
22
23
P62/AN2
P63/AN3
VREF
AVSS
VCC
VSS
XIN
XOUT
60
61
4
7
P67/AN7
P66/AN6
P57/INT3
P54/CNTR0
12
62
63
5
8
10
13
17
19
P65/AN5
P64/AN4
P56/PWM
P53/SRDY2
P51/SOUT2
P46/SCLK1
P42/INT1
RESET
2
3
6
9
11
15
16
18
P61/AN1
P60/AN0
P55/CNTR1
P52/SCLK2
P50/SIN2
P44/RXD1
P43/INT2
CNVSS
A
B
C
D
E
F
G
H
P47/SRDY1/CNTR2
14
P45/TXD1
21
P40/INT40/XCOUT
20
M38049
FFLWG
Package (TOP VIEW)
Fig. 3
Pin configuration (Top view) (PTLG0064JA-A (64F0G))
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 3 of 128
7
6
5
4
3
P41/INT00/XCIN
Package code : PTLG0064JA-A (64F0G)
Note : The numbers in circles corresponds with the number on the packages HP/KP.
8
2
1
3804 Group (Spec.L)
Table 1
Performance overview
Parameter
Function
Number of basic instructions
71
Minimum instruction execution time
0.24 μs (Oscillation frequency 16.8 MHz)
Oscillation frequency
Oscillation frequency 16.8 MHz (Maximum)
Memory
sizes
ROM
60 Kbytes
RAM
2048 bytes
I/O port
P0-P6
56 pins
Software pull-up resistors
Built-in
Interrupt
21 sources, 16 vectors (8 external, 12 internal, 1 software)
Timer
8-bit × 4 (with 8-bit prescaler), 16-bit × 1
Serial interface
8-bit × 2 (UART or Clock-synchronized)
8-bit × 1 (Clock-synchronized)
PWM
8-bit × 1 (with 8-bit prescaler)
A/D converter
10-bit × 16 channels (8-bit reading enabled)
D/A converter
8-bit × 2 channels
Watchdog timer
16-bit × 1
Multi-master I2C-BUS interface
1 channel
LED direct drive port
8 (average current: 15 mA, peak current: 30 mA, total current: 90 mA)
Clock generating circuits
Built-in 2 circuits
(connect to external ceramic resonator or quartz-crystal oscillator)
Power
source
voltage
In high-speed
mode
In middle-speed
mode
At 16.8 MHz
4.5 to 5.5 V
At 12.5 MHz
4.0 to 5.5 V
At 8.4 MHz
2.7 to 5.5 V
At 16.8 MHz
4.5 to 5.5 V
At 12.5 MHz
In low-speed mode At 32 MHz
Power
dissipation
2.7 to 5.5 V
2.7 to 5.5 V
In high-speed mode
Typ. 27.5 mW (Vcc = 5.0 V, f(XIN) = 16.8 MHz, Ta = 25 °C)
In low-speed mode
Typ. 1200 μW (Vcc = 3.0 V, f(XIN) = stop, f(XCIN) = 32 kHz, Ta = 25 °C)
Operating temperature range
-20 to 85 °C
Device structure
CMOS silicon gate
Package
64-pin plastic molded SDIP/LQFP/FLGA
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 4 of 128
Fig. 4
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Functional block diagram
Page 5 of 128
VREF AVSS
3
A/D
converter
(10)
2
31
28
29
I/O port P5
12 13 14 15 16 17 18 19
4 5 6 7 8 9 10 11
I/O port P6
P5 (8)
INT3
RAM
P6 (8)
PWM (8)
Main
clock Sub-clock Sub-clock
output
output input
XOUT
XCIN
XCOUT
Clock generating circuit
30
Main
clock
input
XIN
SI/O2 (8)
ROM
P4 (8)
I/O port P4
PS
PCL
S
Y
X
A
INT00
INT1
INT2
INT40
D/A
converter
2 (8)
C P U
20 21 22 23 24 25 28 29
SI/O1 (8)
0
PCH
1
32
Data bus
VCC
VSS
D/A
converter
1 (8)
FUNCTIONAL BLOCK DIAGRAM (Package: PRDP0064BA-A (64P4B))
I/O port P3
57 58 59 60 61 62 63 64
P3 (8)
SI/O3 (8)
27
Reset input
RESET
I/O port P2
(LED drive)
I/O port P0
49 50 51 52 53 54 55 56
41 42 43 44 45 46 47 48
I/O port P1
P0 (8)
INT01
INT41
P1 (8)
I2C
Timer Y (8)
Timer X (8)
Timer 2 (8)
Timer 1 (8)
Timer Z (16)
Prescaler Y (8)
Prescaler X (8)
Prescaler 12 (8)
33 34 35 36 37 38 39 40
P2 (8)
CNTR2
CNTR1
CNTR0
26
CNVSS
3804 Group (Spec.L)
3804 Group (Spec.L)
PIN DESCRIPTION
Table 2
Pin description
Pin
Name
Functions
Function except a port function
VCC, VSS
Power source
• Apply voltage of 2.7 V − 5.5 V to VCC, and 0 V to VSS.
CNVSS
CNVSS input
• This pin controls the operation mode of the chip.
• Normally connected to VSS.
VREF
Reference
voltage
• Reference voltage input pin for A/D and D/A converters.
AVSS
Analog power
source
• Analog power source input pin for A/D and D/A converters.
• Connect to VSS.
RESET
Reset input
• Reset input pin for active “L”.
XIN
Main clock input • Input and output pins for the clock generating circuit.
• Connect a ceramic resonator or quartz-crystal oscillator between the XIN and XOUT pins to set
the oscillation frequency.
Main clock
• When an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin
output
open.
XOUT
P00/AN8−
P07/AN15
I/O port P0
P10/INT41
P11/INT01
I/O port P1
P12−P17
• 8-bit CMOS I/O port.
• I/O direction register allows each pin to be individually
programmed as either input or output.
• CMOS compatible input level.
• CMOS 3-state output structure.
• Pull-up control is enabled in a bit unit.
• P20 − P27 (8 bits) are enabled to output large current for
LED drive.
• A/D converter input pin
• Interrupt input pin
P20(LED0)P27(LED7)
I/O port P2
P30/DA1
P31/DA2
I/O port P3
• D/A converter input pin
• 8-bit CMOS I/O port.
• I/O direction register allows each pin to be individually
programmed as either input or output.
• I2C-BUS interface function pins
• CMOS compatible input level.
• P32 to P33 can be switched between CMOS compatible
• Serial I/O3 function pin
input level or SMBUS input level in the I2C-BUS interface
function.
• P30, P31, P34 − P37 are CMOS 3-state output structure.
• P32, P33 are N-channel open-drain output structure.
• Pull-up control of P30, P31, P34 − P37 is enabled in a bit unit.
I/O port P4
• 8-bit CMOS I/O port.
• I/O direction register allows each pin to be individually
programmed as either input or output.
• CMOS compatible input level.
• CMOS 3-state output structure.
• Pull-up control is enabled in a bit unit.
P32/SDA
P33/SCL
P34/RXD3
P35/TXD3
P36/SCLK3
P37/SRDY3
P40/INT40/XCOUT
P41/INT00/XCIN
P42/INT1
P43/INT2
P44/RXD1
P45/TXD1
P46/SCLK1
• Interrupt input pin
• Serial I/O1 function pin
• Serial I/O1, timer Z function pin
P47/SRDY1/CNTR2
P50/SIN2
P51/SOUT2
P52/SCLK2
P53/SRDY2
• Interrupt input pin
• Sub-clock generating I/O pin
(resonator connected)
I/O port P5
• Serial I/O2 function pin
P54/CNTR0
• Timer X function pin
P55/CNTR1
• Timer Y function pin
P56/PWM
• PWM output pin
P57/INT3
• Interrupt input pin
P60/AN0−
P67/AN7
I/O port P6
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
• A/D converter input pin
Page 6 of 128
3804 Group (Spec.L)
PART NUMBERING
Product name
M3804 9
F
F
L
SP
Package code
SP : PRDP0064BA-A (64P4B)
HP : PLQP0064KB-A (64P6Q-A)
KP : PLQP0064GA-A (64P6U-A)
WG : PTLG0064JA-A (64F0G)
-: standard
L: Minner spec. change product
ROM/PROM size
1: 4096 bytes
2: 8192 bytes
3: 12288 bytes
4: 16384 bytes
5: 20480 bytes
6: 24576 bytes
7: 28672 bytes
8: 32768 bytes
9: 36864 bytes
A: 40960 bytes
B: 45056 bytes
C: 49152 bytes
D: 53248 bytes
E: 57344 bytes
F: 61440 bytes
Memory type
F: Flash memory version
RAM size
0: 192 bytes
1: 256 bytes
2: 384 bytes
3: 512 bytes
4: 640 bytes
Fig. 5
Part numbering
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 7 of 128
5: 768 bytes
6: 896 bytes
7: 1024 bytes
8: 1536 bytes
9: 2048 bytes
3804 Group (Spec.L)
GROUP EXPANSION
Renesas plans to expand the 3804 group (Spec.L) as follows.
Memory Size
• Flash memory size .....................................................60 Kbytes
• RAM size ................................................................. 2048 bytes
Packages
• PRDP0064BA-A (64P4B)
........................................... 64-pin shrink plastic-molded SDIP
• PLQP0064KB-A (64P6Q-A)
...........................................0.5 mm-pitch plastic molded LQFP
• PLQP0064GA-A (64P6U-A)
...........................................0.8 mm-pitch plastic molded LQFP
• PTLG0064JA-A (64F0G)
........................................0.65 mm-pitch plastic molded FLGA
Memory Expansion Plan
ROM size (bytes)
M38049FFL
60 K
48 K
32 K
28 K
24 K
20 K
16 K
12 K
8K
384
512
640
768
896 1024 1152 1280 1408 1536 2048 3072 4032
RAM size (bytes)
Fig. 6
Table 3
Memory expansion plan
Support products
Part No.
ROM size (bytes)
RAM size
(bytes)
Package
M38049FFLSP
PRDP0064BA-A (64P4B)
M38049FFLHP
PLQP0064KB-A (64P6Q-A)
M38049FFLKP
57344+4096 (NOTE)
M38049FFLWG
PLQP0064GA-A (64P6U-A)
PTLG0064JA-A (64F0G)
NOTE:
1. ROM size includes the ID code area.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
2048
Page 8 of 128
Remarks
VCC = 2.7 to 5.5 V
3804 Group (Spec.L)
FUNCTIONAL DESCRIPTION
CENTRAL PROCESSING UNIT (CPU)
The 3804 group (Spec.L) uses the standard 740 Family
instruction set. Refer to the 740 Family Software Manual for
details on the instruction set.
Machine-resident 740 Family instructions are as follows:
The FST and SLW instructions cannot be used.
The STP, WIT, MUL, and DIV instructions can be used.
[Accumulator (A)]
The accumulator is an 8-bit register. Data operations such as data
transfer, etc. are executed mainly through the accumulator.
[Index Register X (X)]
The index register X is an 8-bit register. In the index addressing
modes, the value of the OPERAND is added to the contents of
register X and specifies the real address.
[Index Register Y (Y)]
The index register Y is an 8-bit register. In partial instruction, the
value of the OPERAND is added to the contents of register Y
and specifies the real address.
b7
[Stack Pointer (S)]
The stack pointer is an 8-bit register used during subroutine calls
and interrupts. This register indicates start address of stored area
(stack) for storing registers during subroutine calls and
interrupts.
The low-order 8 bits of the stack address are determined by the
contents of the stack pointer. The high-order 8 bits of the stack
address are determined by the stack page selection bit. If the
stack page selection bit is “0”, the high-order 8 bits becomes
“0016”. If the stack page selection bit is “1”, the high-order 8 bits
becomes “0116”.
The operations of pushing register contents onto the stack and
popping them from the stack are shown in Figure 8.
Store registers other than those described in Figure 7 with
program when the user needs them during interrupts or
subroutine calls (see Table 4).
[Program Counter (PC)]
The program counter is a 16-bit counter consisting of two 8-bit
registers PCH and PCL. It is used to indicate the address of the
next instruction to be executed.
b0
A
b7
Accumulator
b0
X
b7
Index Register X
b0
Y
b7
Index Register Y
b0
S
b15
b7
b0
PCL
PCH
Stack Pointer
Program Counter
b7
b0
N V T B D I Z C Processor Status Register (PS)
Carry Flag
Zero Flag
Interrupt Disable Flag
Decimal Mode Flag
Break Flag
Index X Mode Flag
Overflow Flag
Negative Flag
Fig. 7
740 Family CPU register structure
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Page 9 of 128
3804 Group (Spec.L)
On-going Routine
Interrupt request(1)
M(S)←(PCH)
Push Return Address
on Stack
(S)←(S) − 1
Execute JSR
M(S)←(PCL)
Push Return
Address
on Stack
M(S)←(PCH)
(S)←(S) − 1
(S)←(S) − 1
M(S)←(PS)
M(S)←(PCL)
Push Contents of
Processor
Status Register on Stack
(S)←(S) − 1
(S)←(S) − 1
Interrupt
Service Routine
.....
Subroutine
.....
Execute RTI
I Flag is Set from
“0” to “1”
Fetch the Jump
Vector
Execute RTS
(S)←(S) + 1
POP Return
Address from
Stack
(S)←(S) + 1
(PS)←M(S)
POP Contents of
Processor Status Register
from Stack
(PCL)←M(S)
(S)←(S) + 1
(S)←(S) + 1
(PCL)←M(S)
(PCH)←M(S)
POP Return
Address from Stack
(S)←(S) + 1
(PCH)←M(S)
Note 1 : Condition for acceptance of an interrupt → Interrupt enable flag is “1”
Interrupt disable flag is “0”
Fig. 8
Table 4
Register push and pop at interrupt generation and subroutine call
Push and pop instructions of accumulator or processor status register
Push instruction to stack
PHA
PHP
Accumulator
Processor status register
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Page 10 of 128
Pop instruction from stack
PLA
PLP
3804 Group (Spec.L)
[Processor status register (PS)]
The processor status register is an 8-bit register consisting of 5
flags which indicate the status of the processor after an
arithmetic operation and 3 flags which decide MCU operation.
Branch operations can be performed by testing the Carry (C)
flag, Zero (Z) flag, Overflow (V) flag, or the Negative (N) flag.
In decimal mode, the Z, V, N flags are not valid.
Bit 4: Break flag (B)
The B flag is used to indicate that the current interrupt was
generated by the BRK instruction. The BRK flag in the
processor status register is always “0”. When the BRK
instruction is used to generate an interrupt, the processor
status register is pushed onto the stack with the break flag set
to “1”.
Bit 0: Carry flag (C)
The C flag contains a carry or borrow generated by the
arithmetic logic unit (ALU) immediately after an arithmetic
operation. It can also be changed by a shift or rotate
instruction.
Bit 5: Index X mode flag (T)
When the T flag is “0”, arithmetic operations are performed
between accumulator and memory. When the T flag is “1”,
direct arithmetic operations and direct data transfers are
enabled between memory locations.
Bit 1: Zero flag (Z)
The Z flag is set if the result of an immediate arithmetic
operation or a data transfer is “0”, and cleared if the result is
anything other than “0”.
Bit 6: Overflow flag (V)
The V flag is used during the addition or subtraction of one
byte of signed data. It is set if the result exceeds +127 to −
128. When the BIT instruction is executed, bit 6 of the
memory location operated on by the BIT instruction is stored
in the overflow flag.
Bit 2: Interrupt disable flag (I)
The I flag disables all interrupts except for the interrupt
generated by the BRK instruction.
Interrupts are disabled when the I flag is “1”.
Bit 3: Decimal mode flag (D)
The D flag determines whether additions and subtractions are
executed in binary or decimal. Binary arithmetic is executed
when this flag is “0”; decimal arithmetic is executed when it
is “1”.
Decimal correction is automatic in decimal mode. Only the
ADC and SBC instructions can execute decimal arithmetic.
Table 5
Bit 7: Negative flag (N)
The N flag is set if the result of an arithmetic operation or
data transfer is negative. When the BIT instruction is
executed, bit 7 of the memory location operated on by the
BIT instruction is stored in the negative flag.
Set and clear instructions of each bit of processor status register
Set instruction
Clear instruction
C flag
SEC
CLC
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REJ03B0266-0100
Z flag
−
−
Page 11 of 128
I flag
SEI
CLI
D flag
SED
CLD
B flag
−
−
T flag
SET
CLT
V flag
−
CLV
N flag
−
−
3804 Group (Spec.L)
[CPU Mode Register (CPUM)] 003B16
The CPU mode register contains the stack page selection bit, the
internal system clock control bits, etc.
The CPU mode register is allocated at address 003B16.
b7
b0
1
CPU mode register
(CPUM: address 003B16)
Processor mode bits
b1 b0
0 0 : Single-chip mode
0 1 :
1 0 :
Not available
1 1 :
Stack page selection bit
0 : 0 page
1 : 1 page
Fix this bit to “1”.
Port XC switch bit
0 : I/O port function (stop oscillating)
1 : XCIN-XCOUT oscillating function
Main clock (XIN-XOUT) stop bit
0 : Oscillating
1 : Stopped
Main clock division ratio selection bits
b7 b6
0 0 : φ = f(XIN)/2 (high-speed mode)
0 1 : φ = f(XIN)/8 (middle-speed mode)
1 0 : φ = f(XCIN)/2 (low-speed mode)
1 1 : Not available
Fig. 9
Structure of CPU mode register
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Page 12 of 128
3804 Group (Spec.L)
MISRG
(1) Bit 0 of address 001016: Oscillation stabilizing time
set after STP instruction released bit
When the MCU stops the clock oscillation by the STP instruction
and the STP instruction has been released by an external
interrupt source, usually, the fixed values of Timer 1 and
Prescaler 12 (Timer 1 = 01 1 6 , Prescaler 12 = FF 1 6 ) are
automatically reloaded in order for the oscillation to stabilize.
The user can inhibit the automatic setting by setting “1” to bit 0
of MISRG (address 001016).
However, by setting this bit to “1”, the previous values, set just
before the STP instruction was executed, will remain in Timer 1
and Prescaler 12. Therefore, you will need to set an appropriate
value to each register, in accordance with the oscillation
stabilizing time, before executing the STP instruction.
Figure 10 shows the structure of MISRG.
• Middle-speed mode automatic switch by program
The middle-speed mode can also be automatically switched by
program while operating in low-speed mode. By setting the
middle-speed automatic switch start bit (bit 3) of MISRG
(address 001016) to “1” in the condition that the middle-speed
mode automatic switch set bit is “1” while operating in lowspeed mode, the MCU will automatically switch to middle-speed
mode. In this case, the oscillation stabilizing time of the main
clock can be selected by the middle-speed automatic switch wait
time set bit (bit 2) of MISRG (address 001016).
(2) Bits 1, 2, 3 of address 001016: Middle-speed Mode
Automatic Switch Function
In order to switch the clock mode of an MCU which has a subclock, the following procedure is necessary:
set CPU mode register (003B16) --> start main clock oscillation
--> wait for oscillation stabilization --> switch to middle-speed
mode (or high-speed mode).
However, the 3804 group (Spec.L) has the built-in function
which automatically switches from low to middle-speed mode by
program.
b7
b0
MISRG
(MISRG: address 001016)
Oscillation stabilizing time set after STP instruction
released bit
0 : Automatically set “0116” to Timer 1, “FF16” to
Prescaler 12
1 : Automatically set disabled
Middle-speed mode automatic switch set bit
0 : Not set automatically
1 : Automatic switching enabled (1)
Middle-speed mode automatic switch wait time set bit
0 : 4.5 to 5.5 machine cycles
1 : 6.5 to 7.5 machine cycles
Middle-speed mode automatic switch start bit
(Depending on program)
0 : Invalid
1 : Automatic switch start(1)
Not used (return “0” when read)
(Do not write “1” to this bit)
Note 1 : When automatic switch to middle-speed mode from low-speed mode occurs,
the values of CPU mode register (3B 16) change.
Fig. 10 Structure of MISRG
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3804 Group (Spec.L)
MEMORY
• Special Function Register (SFR) Area
The Special Function Register area in the zero page contains
control registers such as I/O ports and timers.
• RAM
The RAM is used for data storage and for stack area of
subroutine calls and interrupts.
• ROM
The ROM area can program/erase.
• Zero Page
Access to this area with only 2 bytes is possible in the zero page
addressing mode.
• Special Page
Access to this area with only 2 bytes is possible in the special
page addressing mode.
<Note>
Since the contents of RAM are undefined at reset, be sure to set
an initial value before use.
• Interrupt Vector Area
The interrupt vector area contains reset and interrupt vectors.
RAM area
RAM size
(bytes)
192
256
384
512
640
768
896
1024
1536
2048
Address
XXXX 16
0 0 0 0 16
00FF 16
013F 16
01BF 16
023F 16
02BF 16
033F 16
03BF 16
043F 16
063F 16
083F 16
0 0 4 0 16
RAM
SFR area
Zero page
0 10 0 16
XXXX16
Not used
0FF0 16
0FFF 16
SFR area
Not used
ROM area
ROM size
(bytes)
4096
8192
12288
16384
20480
24576
28672
32768
36864
40960
45056
49152
53248
57344
61440
Address
YYYY 16
F000 16
E00016
D000 16
C000 16
B00016
A00016
900016
800016
700016
600016
500016
400016
300016
200016
100016
Fig. 11 Memory map diagram
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Page 14 of 128
YYYY16
ROM
FF00 16
FFD4 16
FFDB 16
FFDC16
FFFE 16
FFFF 16
Reserved ROM area
(ID code)
Reserved ROM area
(ROM code Protect)
Interrupt vector area
Reserved ROM area
Special page
3804 Group (Spec.L)
000016 Port P0 (P0)
000116 Port P0 direction register (P0D)
002016
Prescaler 12 (PRE12)
002116
Timer 1 (T1)
000216 Port P1 (P1)
000316 Port P1 direction register (P1D)
002216
Timer 2 (T2)
002316
Timer XY mode register (TM)
000416 Port P2 (P2)
000516 Port P2 direction register (P2D)
002416
Prescaler X (PREX)
002516
Timer X (TX)
000616 Port P3 (P3)
000716 Port P3 direction register (P3D)
002616
Prescaler Y (PREY)
002716
Timer Y (TY)
000816 Port P4 (P4)
000916 Port P4 direction register (P4D)
002816
Timer Z low-order (TZL)
002916
Timer Z high-order (TZH)
002A16
Timer Z mode register (TZM)
002B16
PWM control register (PWMCON)
000A16
Port P5 (P5)
000B16 Port P5 direction register (P5D)
000C16 Port P6 (P6)
000D16 Port P6 direction register (P6D)
000E16 Timer 12, X count source selection register (T12XCSS)
002C16 PWM prescaler (PREPWM)
002D16 PWM register (PWM)
002E16
000F16 Timer Y, Z count source selection register (TYZCSS)
001016 MISRG
002F16
Baud rate generator 3 (BRG3)
003016
Transmit/Receive buffer register 3 (TB3/RB3)
001116 I2C data shift register (S0)
001216 I2C special mode status register (S3)
003116
Serial I/O3 status register (SIO3STS)
003216
Serial I/O3 control register (SIO3CON)
001316 I C status register (S1)
001416 I2C control register (S1D)
003316
UART3 control register (UART3CON)
003416
AD/DA control register (ADCON)
001516 I2C clock control register (S2)
001616 I2C START/STOP condition control register (S2D)
003516
AD conversion register 1 (AD1)
003616
DA1 conversion register (DA1)
001716 I C special mode control register (S3D)
001816 Transmit/Receive buffer register 1 (TB1/RB1)
003716
DA2 conversion register (DA2)
003816
AD conversion register 2 (AD2)
001916 Serial I/O1 status register (SIO1STS)
001A16 Serial I/O1 control register (SIO1CON)
003916
Interrupt source selection register (INTSEL)
003A16
Interrupt edge selection register (INTEDGE)
001B16 UART1 control register (UART1CON)
001C16 Baud rate generator (BRG1)
003B16
CPU mode register (CPUM)
2
2
001D16 Serial I/O2 control register (SIO2CON)
001E16 Watchdog timer control register (WDTCON)
003C16 Interrupt request register 1 (IREQ1)
003D16 Interrupt request register 2 (IREQ2)
003E16
Interrupt control register 1 (ICON1)
001F16 Serial I/O2 register (SIO2)
003F16
Interrupt control register 2 (ICON2)
0FE016 Flash memory control register 0 (FMCR0)
0FE116 Flash memory control register 1 (FMCR1)
0FF016
Port P0 pull-up control register (PULL0)
0FF116
Port P1 pull-up control register (PULL1)
0FE216 Flash memory control register 2 (FMCR2)
0FE316 Reserved (1)
0FF216
Port P2 pull-up control register (PULL2)
0FF316
Port P3 pull-up control register (PULL3)
0FE416 Reserved (1)
0FE516 Reserved (1)
0FF416
Port P4 pull-up control register (PULL4)
0FF516
Port P5 pull-up control register (PULL5)
Reserved (1)
0FF616
Port P6 pull-up control register (PULL6)
0FE716 Reserved (1)
0FE816 Reserved (1)
0FF716
I2C slave address register 0 (S0D0)
0FF816
I2C slave address register 1 (S0D1)
0FE916
Reserved (1)
0FF916
I2C slave address register 2 (S0D2)
0FEA16
Reserved (1)
0FE616
0FEB16 Reserved (1)
0FEC16 Reserved (1)
Note 1: Do not write any data to these addresses, because these are
reserved area.
0FED16 Reserved (1)
0FEE16 Reserved (1)
0FEF16 Reserved (1)
Fig. 12 Memory map of special function register (SFR)
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Page 15 of 128
3804 Group (Spec.L)
I/O PORTS
The I/O ports have direction registers which determine the
input/output direction of each individual pin. Each bit in a
direction register corresponds to one pin, and each pin can be set
to be input port or output port.
When “0” is written to the bit corresponding to a pin, that pin
becomes an input pin. When “1” is written to that bit, that pin
becomes an output pin.
If data is read from a pin which is set to output, the value of the
port output latch is read, not the value of the pin itself. Pins set to
Table 6
input are floating. If a pin set to input is written to, only the port
output latch is written to and the pin remains floating.
By setting the port P0 pull-up control register (address 0FF016)
to the port P6 pull-up control register (address 0FF616) ports can
control pull-up with a program. However, the contents of these
registers do not affect ports programmed as the output ports.
I/O port function
Pin
P00/AN8−P07/AN15
P10/INT41
P11/INT01
P12−P17
P20(LED0)−
P27(LED7)
P30/DA1
P31/DA2
P32/SDA
P33/SCL
Name
Input/
I/O Structure
Output
Port P0 Input/output, CMOS compatible input level
CMOS 3-state output
Port P1 individual
bits
Port P3
CMOS compatible input level
N-channel open-drain output
CMOS/SMBUS input level
(when selecting I2C-BUS
interface function)
CMOS compatible input level
CMOS 3-state output
Port P4
D/A converter output
AD/DA control register
(4)
I2C-BUS interface
function I/O
I2C control register
(5)
Serial I/O3 function I/O Serial I/O3 control register
UART3 control register
Interrupt edge selection
(10)
register
(11)
CPU mode register
Interrupt edge selection
(2)
register
Serial I/O1 function I/O Serial I/O1 control register (6)
UART1 control register
(7)
(8)
Serial I/O1 function I/O Serial I/O1 control register (12)
Timer Z function I/O
Timer Z mode register
Serial I/O2 function I/O Serial I/O2 control register (13)
(14)
(15)
(16)
Port P5
P54/CNTR0
P55/CNTR1
P56/PWM
P57/INT3
Port P6
Timer X, Y function I/O Timer XY mode register
(17)
PWM output
PWM control register
External interrupt input Interrupt edge selection
register
A/D converter input
AD/DA control register
(18)
(2)
NOTES:
1. Refer to the applicable sections how to use double-function ports as function I/O ports.
2. Make sure that the input level at each pin is either 0 V or VCC during execution of the STP instruction.
When an input level is at an intermediate potential, a current will flow from VCC to VSS through the input-stage gate.
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REJ03B0266-0100
(6)
(7)
(8)
(9)
External interrupt input
Sub-clock generating
circuit
External interrupt input
P47/SRDY1/CNTR2
P60/AN0−P67/AN7
A/D converter input
AD/DA control register
External interrupt input Interrupt edge selection
register
Ref.
No.
(1)
(2)
(3)
P42/INT1
P43/INT2
P44/RXD1
P45/TXD1
P46/SCLK1
P50/SIN2
P51/SOUT2
P52/SCLK2
P53/SRDY2
Related SFRs
Port P2
P34/RXD3
P35/TXD3
P36/SCLK3
P37/SRDY3
P40/INT40/XCOUT
P41/INT00/XCIN
Non-Port Function
Page 16 of 128
(1)
3804 Group (Spec.L)
(1) Ports P0, P6
(2) Ports P10, P11, P42, P43, P57
Pull-up control bit
Pull-up control bit
Direction
register
Direction
register
Port latch
Data bus
Port latch
Data bus
A/D converter input
Interrupt input
Analog input pin
selection bit
(3) Ports P12 to P17, P2
(4) Ports P30, P31
Pull-up control bit
Pull-up control bit
Direction
register
Direction
register
Port latch
Data bus
Port latch
Data bus
D/A converter output
DA1 output enable bit (P30)
DA2 output enable bit (P31)
(5) Ports P32, P33
(6) Ports P34, P44
Pull-up control bit
Serial I/O enable bit
Receive enable bit
I2C-BUS interface enable bit
Direction
register
Data bus
Direction
register
Port latch
Data bus
SDA output
SCL output
Port latch
SDA input
SCL input
(7) Ports P35, P45
Serial I/O input
(8) Ports P36, P46
Pull-up control bit
Serial I/O enable bit
Transmit enable bit
P-channel
output
disable bit
Serial I/O synchronous clock
selection bit
Serial I/O enable bit
Serial I/O mode selection bit
Pull-up control bit
Serial I/O enable bit
Direction
register
Data bus
Direction
register
Data bus
Port latch
Serial I/O output
Port latch
Serial I/O clock output
Serial I/O external clock input
Fig. 13 Port block diagram (1)
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3804 Group (Spec.L)
(9) Port P37
(10) Port P40
Pull-up control bit
Pull-up control bit
Serial I/O3 mode selection bit
Serial I/O3 enable bit
SRDY3 output enable bit
Port XC switch bit
Direction
register
Direction
register
Data bus
Data bus
Port latch
Port latch
INT40 Interrupt input
Serial I/O3 ready output
Port XC
switch bit
(11) Port P41
(12) Port P47
Pull-up control bit
Timer Z operating
mode bits
Bit 2
Bit 1
Bit 0
Port XC switch bit
Direction
register
Data bus
Pull-up control bit
Serial I/O1 mode selection bit
Serial I/O1 enable bit
SRDY1 output enable bit
Port latch
Direction
register
INT00 Interrupt input
Data bus
Port latch
Port XC
switch bit
Sub-clock generating circuit input
Timer output
Serial I/O1 ready output
CNTR2 interrupt input
(13) Port P50
(14) Port P51
Pull-up control bit
Pull-up control bit
Serial I/O2 transmit completion signal
Serial I/O2 port selection bit
Direction
register
Direction
register
Data bus
Port latch
Data bus
Port latch
Serial I/O2 input
Serial I/O2 output
Fig. 14 Port block diagram (2)
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Page 18 of 128
P-channel
output
disable bit
3804 Group (Spec.L)
(15) Port P52
(16) Port P53
Pull-up control bit
Pull-up control bit
Serial I/O2 synchronous clock
selection bit
Serial I/O2 port selection bit
SRDY2 output enable bit
Direction
register
Direction
register
Data bus
Data bus
Port latch
Port latch
Serial I/O2 ready output
Serial I/O2 clock output
Serial I/O2 external clock input
(17) Ports P54, P55
(18) Port P56
Pull-up control bit
Pull-up control bit
PWM function enable bit
Direction
register
Data bus
Direction
register
Port latch
Data bus
Port latch
Pulse output mode
Timer output
PWM output
CNTR Interrupt input
Fig. 15 Port block diagram (3)
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Page 19 of 128
3804 Group (Spec.L)
b7
b0
Port P0 pull-up control register
(PULL0: address 0FF016)
P00 pull-up control bit
0: No pull-up
1: Pull-up
P01 pull-up control bit
0: No pull-up
1: Pull-up
P02 pull-up control bit
0: No pull-up
1: Pull-up
P03 pull-up control bit
0: No pull-up
1: Pull-up
P04 pull-up control bit
0: No pull-up
1: Pull-up
P05 pull-up control bit
0: No pull-up
1: Pull-up
P06 pull-up control bit
0: No pull-up
1: Pull-up
P07 pull-up control bit
0: No pull-up
1: Pull-up
b7
Note:
Pull-up control is valid when the corresponding
bit of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be
set to the port of which pull-up is selected.
Note:
Pull-up control is valid when the corresponding
bit of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be
set to the port of which pull-up is selected.
b0
Port P1 pull-up control register
(PULL1: address 0FF116)
P10 pull-up control bit
0: No pull-up
1: Pull-up
P11 pull-up control bit
0: No pull-up
1: Pull-up
P12 pull-up control bit
0: No pull-up
1: Pull-up
P13 pull-up control bit
0: No pull-up
1: Pull-up
P14 pull-up control bit
0: No pull-up
1: Pull-up
P15 pull-up control bit
0: No pull-up
1: Pull-up
P16 pull-up control bit
0: No pull-up
1: Pull-up
P17 pull-up control bit
0: No pull-up
1: Pull-up
Fig. 16 Structure of port pull-up control register (1)
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Page 20 of 128
3804 Group (Spec.L)
b7
b0
Port P2 pull-up control register
(PULL2: address 0FF216)
P20 pull-up control bit
0: No pull-up
1: Pull-up
P21 pull-up control bit
0: No pull-up
1: Pull-up
P22 pull-up control bit
0: No pull-up
1: Pull-up
P23 pull-up control bit
0: No pull-up
1: Pull-up
P24 pull-up control bit
0: No pull-up
1: Pull-up
P25 pull-up control bit
0: No pull-up
1: Pull-up
P26 pull-up control bit
0: No pull-up
1: Pull-up
P27 pull-up control bit
0: No pull-up
1: Pull-up
b7
Note:
Pull-up control is valid when the corresponding
bit of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be
set to the port of which pull-up is selected.
Note:
Pull-up control is valid when the corresponding
bit of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be
set to the port of which pull-up is selected.
b0
Port P3 pull-up control register
(PULL3: address 0FF316)
P30 pull-up control bit
0: No pull-up
1: Pull-up
P31 pull-up control bit
0: No pull-up
1: Pull-up
Not used
(return “0” when read)
P34 pull-up control bit
0: No pull-up
1: Pull-up
P35 pull-up control bit
0: No pull-up
1: Pull-up
P36 pull-up control bit
0: No pull-up
1: Pull-up
P37 pull-up control bit
0: No pull-up
1: Pull-up
Fig. 17 Structure of port pull-up control register (2)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 21 of 128
3804 Group (Spec.L)
b7
b0
Port P4 pull-up control register
(PULL4: address 0FF416)
P40 pull-up control bit
0: No pull-up
1: Pull-up
P41 pull-up control bit
0: No pull-up
1: Pull-up
P42 pull-up control bit
0: No pull-up
1: Pull-up
P43 pull-up control bit
0: No pull-up
1: Pull-up
P44 pull-up control bit
0: No pull-up
1: Pull-up
P45 pull-up control bit
0: No pull-up
1: Pull-up
P46 pull-up control bit
0: No pull-up
1: Pull-up
P47 pull-up control bit
0: No pull-up
1: Pull-up
b7
Note:
Pull-up control is valid when the corresponding
bit of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be
set to the port of which pull-up is selected.
Note:
Pull-up control is valid when the corresponding
bit of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be
set to the port of which pull-up is selected.
b0
Port P5 pull-up control register
(PULL5: address 0FF516)
P50 pull-up control bit
0: No pull-up
1: Pull-up
P51 pull-up control bit
0: No pull-up
1: Pull-up
P52 pull-up control bit
0: No pull-up
1: Pull-up
P53 pull-up control bit
0: No pull-up
1: Pull-up
P54 pull-up control bit
0: No pull-up
1: Pull-up
P55 pull-up control bit
0: No pull-up
1: Pull-up
P56 pull-up control bit
0: No pull-up
1: Pull-up
P57 pull-up control bit
0: No pull-up
1: Pull-up
Fig. 18 Structure of port pull-up control register (3)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 22 of 128
3804 Group (Spec.L)
b7
b0
Port P6 pull-up control register
(PULL6: address 0FF616)
P60 pull-up control bit
0: No pull-up
1: Pull-up
P61 pull-up control bit
0: No pull-up
1: Pull-up
P62 pull-up control bit
0: No pull-up
1: Pull-up
P63 pull-up control bit
0: No pull-up
1: Pull-up
P64 pull-up control bit
0: No pull-up
1: Pull-up
P65 pull-up control bit
0: No pull-up
1: Pull-up
P66 pull-up control bit
0: No pull-up
1: Pull-up
P67 pull-up control bit
0: No pull-up
1: Pull-up
Fig. 19 Structure of port pull-up control register (4)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 23 of 128
Note:
Pull-up control is valid when the corresponding
bit of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be
set to the port of which pull-up is selected.
3804 Group (Spec.L)
Termination of unused pins
• Termination of common pins
I/O ports:
Select an input port or an output port and follow
each processing method.
In addition, it is recommended that related
registers be overwritten periodically to prevent
malfunctions, etc.
Output ports: Open.
Input ports: If the input level become unstable, through current
flow to an input circuit, and the power supply
current may increase.
Table 7
Especially, when expecting low consumption
current (at STP or WIT instruction execution etc.),
pull-up or pull-down input ports to prevent
through current (built-in resistor can be used).
We recommend processing unused pins through a
resistor which can secure IOH(avg) or IOL(avg).
Because, when an I/O port or a pin which have an
output function is selected as an input port, it may
operate as an output port by incorrect operation
etc.
Termination of unused pins
Pins
P0, P1, P2, P3, P4, P5, P6
VREF
AVSS
XOUT
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Termination
• Set to the input mode and connect each to VCC or VSS through a resistor of 1 kΩ to 10 kΩ.
• Set to the output mode and open at “L” or “H” output state.
Connect to VCC or VSS (GND).
Connect to VCC or VSS (GND).
Open (only when using external clock)
Page 24 of 128
3804 Group (Spec.L)
INTERRUPTS
The 3804 group (Spec.L) interrupts are vector interrupts with a
fixed priority scheme, and generated by 16 sources among 24
sources: 10 external, 13 internal, and 1 software.
The interrupt sources, vector addresses(1), and interrupt priority
are shown in Table 8.
Each interrupt except the BRK instruction interrupt has the
interrupt request bit and the interrupt enable bit. These bits and
the interrupt disable flag (I flag) control the acceptance of
interrupt requests. Figure 20 shows an interrupt control diagram.
Table 8
An interrupt requests is accepted when all of the following
conditions are satisfied:
• Interrupt disable flag.................................“0”
• Interrupt request bit...................................“1”
• Interrupt enable bit....................................“1”
Though the interrupt priority is determined by hardware, priority
processing can be performed by software using the above bits
and flag.
Interrupt vector addresses and priority
1
Vector
Interrupt Request Generating
Addresses(1)
Conditions
High
Low
FFFD16 FFFC16 At reset
2
FFFB16
FFFA16
Timer Z
INT1
3
FFF916
FFF816
Serial I/O1 reception
4
FFF716
FFF616
Serial I/O1
transmission
5
FFF516
FFF416
Interrupt Source
Reset(2)
INT0
Priority
SCL, SDA
6
7
8
9
10
FFF316
FFF116
FFEF16
FFED16
FFEB16
FFF216
FFF016
FFEE16
FFEC16
FFEA16
11
FFE916
FFE816
Serial I/O2
12
FFE716
FFE616
Timer Z
INT2
13
FFE516
FFE416
I2C
INT3
14
FFE316
FFE216
INT4
15
FFE116
FFE016
16
FFDF16
FFDE16
Timer X
Timer Y
Timer 1
Timer 2
CNTR0
SCL, SDA
CNTR1
Serial I/O3 reception
CNTR2
A/D conversion
Serial I/O3
transmission
At detection of either rising or falling
edge of INT0 input
At timer Z underflow
At detection of either rising or falling
edge of INT1 input
At completion of serial I/O1 data
reception
At completion of serial I/O1
transmission shift or when
transmission buffer is empty
At detection of either rising or falling
edge of SCL or SDA
At timer X underflow
At timer Y underflow
At timer 1 underflow
At timer 2 underflow
At detection of either rising or falling
edge of CNTR0 input
At detection of either rising or falling
edge of SCL or SDA
At detection of either rising or falling
edge of CNTR1 input
At completion of serial I/O3 data
reception
At completion of serial I/O2 data
transmission or reception
At timer Z underflow
At detection of either rising or falling
edge of INT2 input
At completion of data transfer
At detection of either rising or falling
edge of INT3 input
At detection of either rising or falling
edge of INT4 input
At detection of either rising or falling
edge of CNTR2 input
At completion of A/D conversion
At completion of serial I/O3
transmission shift or when
transmission buffer is empty
At BRK instruction execution
BRK instruction
17
FFDD16 FFDC16
NOTES:
1. Vector addresses contain interrupt jump destination addresses.
2. Reset function in the same way as an interrupt with the highest priority.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 25 of 128
Remarks
Non-maskable
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
Valid when serial I/O1 is selected
Valid when serial I/O1 is selected
External interrupt
(active edge selectable)
STP release timer underflow
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
Valid when serial I/O3 is selected
Valid when serial I/O2 is selected
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
Valid when serial I/O3 is selected
Non-maskable software interrupt
3804 Group (Spec.L)
Interrupt request bit
Interrupt enable bit
Interrupt disable flag (I)
BRK instruction
Reset
Interrupt request
Fig. 20 Interrupt control diagram
• Interrupt Disable Flag
The interrupt disable flag is assigned to bit 2 of the processor
status register. This flag controls the acceptance of all interrupt
requests except for the BRK instruction. When this flag is set to
“1”, the acceptance of interrupt requests is disabled. When it is
set to “0”, acceptance of interrupt requests is enabled. This flag is
set to “1” with the SET instruction and set to “0” with the CLI
instruction.
When an interrupt request is accepted, the contents of the
processor status register are pushed onto the stack while the
interrupt disable flag remains set to “0”. Subsequently, this flag is
automatically set to “1” and multiple interrupts are disabled. To
use multiple interrupts, set this flag to “0” with the CLI
instruction within the interrupt processing routine.
The contents of the processor status register are popped off the
stack with the RTI instruction.
• Interrupt Request Bits
Once an interrupt request is generated, the corresponding
interrupt request bit is set to “1” and remains “1” until the request
is accepted . Wh en the request is accepted, th is bit is
automatically set to “0”.
Each interrupt request bit can be set to “0”, but cannot be set to
“1”, by software.
• Interrupt Enable Bits
The interrupt enable bits control the acceptance of the
corresponding interrupt requests. When an interrupt enable bit is
set to “0”, the acceptance of the corresponding interrupt request
is disabled. If an interrupt request occurs in this condition, the
corresponding interrupt request bit is set to “1”, but the interrupt
request is not accepted. When an interrupt enable bit is set to “1”,
acceptance of the corresponding interrupt request is enabled.
Each interrupt enable bit can be set to “0” or “1” by software.
The interrupt enable bit for an unused interrupt should be set to
“0”.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 26 of 128
• Interrupt Source Selection
Any of the following combinations can be selected by the
interrupt source selection register (003916).
1. INT0 or timer Z
2. Serial I/O1 transmission or SCL, SDA
3. CNTR0 or SCL, SDA
4. CNTR1 or Serial I/O3 reception
5. Serial I/O2 or timer Z
6. INT2 or I2C
7. INT4 or CNTR2
8. A/D conversion or serial I/O3 transmission
• External Interrupt Pin Selection
For external interrupts INT0 and INT4, the INT0, INT4 interrupt
switch bit in the interrupt edge selection register (bit 6 of address
003A 16 ) can be used to select INT00 and INT40 pin input or
INT01 and INT41 pin input.
3804 Group (Spec.L)
b7
b0
Interrupt edge selection register
(INTEDGE : address 003A16)
INT0 interrupt edge selection bit
INT1 interrupt edge selection bit
Not used (returns “0” when read)
INT2 interrupt edge selection bit
INT3 interrupt edge selection bit
INT4 interrupt edge selection bit
INT0, INT4 interrupt switch bit
0 : INT00, INT40 interrupt
1 : INT01, INT41 interrupt
Not used (returns “0” when read)
b7
b0
0 : Falling edge active
1 : Rising edge active
0 : Falling edge active
1 : Rising edge active
Interrupt request register 1
(IREQ1 : address 003C16)
b7
b0
INT0/Timer Z interrupt request bit
INT1 interrupt request bit
Serial I/O1 receive interrupt request bit
Serial I/O1 transmit/SCL,SDA interrupt
request bit
Timer X interrupt request bit
Timer Y interrupt request bit
Timer 1 interrupt request bit
Timer 2 interrupt request bit
CNTR0/SCL,SDA interrupt request bit
CNTR1/Serial I/O3 receive interrupt
request bit
Serial I/O2/Timer Z interrupt request bit
INT2/I2C interrupt request bit
INT3 interrupt request bit
INT4/CNTR2 interrupt request bit
AD converter/Serial I/O3 transmit
interrupt request bit
Not used (returns “0” when read)
0 : No interrupt request issued
1 : Interrupt request issued
b7
b0
Interrupt control register 1
(ICON1 : address 003E16)
INT0/Timer Z interrupt enable bit
INT1 interrupt enable bit
Serial I/O1 receive interrupt enable bit
Serial I/O1 transmit/SCL,SDA interrupt
enable bit
Timer X interrupt enable bit
Timer Y interrupt enable bit
Timer 1 interrupt enable bit
Timer 2 interrupt enable bit
0 : Interrupts disabled
1 : Interrupts enabled
b7
b0
Interrupt request register 2
(IREQ2 : address 003D16)
0 : No interrupt request issued
1 : Interrupt request issued
b7
b0
Interrupt control register 2
(ICON2 : address 003F16)
CNTR0/SCL,SDA interrupt enable bit
CNTR1/Serial I/O3 receive interrupt
enable bit
Serial I/O2/Timer Z interrupt enable bit
INT2/I2C interrupt enable bit
INT3 interrupt enable bit
INT4/CNTR2 interrupt enable bit
AD converter/Serial I/O3 transmit
interrupt enable bit
Not used (returns “0” when read)
(Do not write “1”.)
0 : Interrupts disabled
1 : Interrupts enabled
Interrupt source selection register
(INTSEL : address 003916)
INT0/Timer Z interrupt source selection bit
0 : INT0 interrupt
1 : Timer Z interrupt
(Do not write “1” to these bits simultaneously.)
Serial I/O2/Timer Z interrupt source selection bit
0 : Serial I/O2 interrupt
1 : Timer Z interrupt
Serial I/O1 transmit/SCL, SDA interrupt source selection bit
0 : Serial I/O1 transmit interrupt
1 : SCL, SDA interrupt
(Do not write “1” to these bits simultaneously.)
CNTR0/SCL, SDA interrupt source selection bit
0 : CNTR0 interrupt
1 : SCL, SDA interrupt
INT4/CNTR2 interrupt source selection bit
0 : INT4 interrupt
1 : CNTR2 interrupt
INT2/I2C interrupt source selection bit
0 : INT2 interrupt
1 : I2C interrupt
CNTR1/Serial I/O3 receive interrupt source selection bit
0 : CNTR1 interrupt
1 : Serial I/O3 receive interrupt
AD converter/Serial I/O3 transmit interrupt source selection bit
0 : A/D converter interrupt
1 : Serial I/O3 transmit interrupt
Fig. 21 Structure of interrupt-related registers
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 27 of 128
3804 Group (Spec.L)
• Interrupt Request Generation, Acceptance, and Handling
Interrupts have the following three phases.
(i) Interrupt Request Generation
An interrupt request is generated by an interrupt source
(external interrupt signal input, timer underflow, etc.) and
the corresponding request bit is set to “1”.
(ii) Interrupt Request Acceptance
Based on the interrupt acceptance timing in each instruction
cycle, the interrupt control circuit determines acceptance
conditions (interrupt request bit, interrupt enable bit, and
interrupt disable flag) and interrupt priority levels for
accepting interrupt requests. When two or more interrupt
requests are generated simultaneously, the highest priority
interrupt is accepted. The value of interrupt request bit for
an unaccepted interrupt remains the same and acceptance is
determined at the next interrupt acceptance timing point.
(iii) Handling of Accepted Interrupt Request
The accepted interrupt request is processed.
Figure 22 shows the time up to execution in the interrupt
processing routine, and Figure 23 shows the interrupt sequence.
Figure 24 shows the timing of interrupt request generation,
interrupt request bit, and interrupt request acceptance.
• Interrupt Handling Execution
When interrupt handling is executed, the following operations
are performed automatically.
(1) Once the currently executing instruction is completed, an
interrupt request is accepted.
(2) The contents of the program counters and the processor
status register at this point are pushed onto the stack area in
order from 1 to 3.
1. High-order bits of program counter (PCH)
2. Low-order bits of program counter (PCL)
3. Processor status register (PS)
(3) Concurrently with the push operation, the jump address of
the corresponding interrupt (the start address of the interrupt
processing routine) is transferred from the interrupt vector to
the program counter.
(4) The interrupt request bit for the corresponding interrupt is
set to “0”. Also, the interrupt disable flag is set to “1” and
multiple interrupts are disabled.
(5) The interrupt routine is executed.
(6) When the RTI instruction is executed, the contents of the
registers pushed onto the stack area are popped off in the
order from 3 to 1. Then, the routine that was before running
interrupt processing resumes.
As described above, it is necessary to set the stack pointer and
the jump address in the vector area corresponding to each
interrupt to execute the interrupt processing routine.
<Notes>
The interrupt request bit may be set to “1” in the following cases.
• When setting the external interrupt active edge
Related registers: Interrupt edge selection register
(address 003A16)
Timer XY mode register (address 002316)
Timer Z mode register (address 002A16)
I2C START/STOP condition control register
(address 001616)
• When switching the interrupt sources of an interrupt vector
address where two or more interrupt sources are assigned
Related registers: Interrupt source selection register
(address 003916)
If it is not necessary to generate an interrupt synchronized with
these settings, take the following sequence.
(1) Set the corresponding enable bit to “0” (disabled).
(2) Set the interrupt edge selection bit (the active edge switch
bit) or the interrupt source bit.
(3) Set the corresponding interrupt request bit to “0” after one
or more instructions have been executed.
(4) Set the corresponding interrupt enable bit to “1” (enabled).
Interrupt request
generated
Interrupt request
acceptance
Interrupt routine
starts
Interrupt sequence
Stack push and
Vector fetch
Main routine
*
0 to 16 cycles
7 cycles
7 to 23 cycles
* When executing DIV instruction
Fig. 22 Time up to execution in interrupt routine
Push onto stack
Vector fetch
Page 28 of 128
Execute interrupt
routine
φ
SYNC
RD
WR
Address bus
Data bus
PC
Not used
S,SPS
S-1,SPS S-2,SPS
PCH
PCL
PS
BL
BH
AL
AL,AH
AH
SYNC : CPU operation code fetch cycle
(This is an internal signal that cannot be observed from the external unit.)
BL, BH: Vector address of each interrupt
AL, AH: Jump destination address of each interrupt
SPS : “0016” or “0116”
([SPS] is a page selected by the stack page selection bit of CPU mode register.)
Fig. 23 Interrupt sequence
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Interrupt handling
routine
3804 Group (Spec.L)
Push onto stack
Vector fetch
Instruction cycle
Instruction cycle
Internal clock φ
SYNC
1
2
IR1 T2
T1
IR2 T3
T1 T2 T3 : Interrupt acceptance timing points
IR1 IR2 : Timings points at which the interrupt request bit is set to “1”.
Note : Period 2 indicates the last φ cycle during one instruction cycle.
(1) The interrupt request bit for an interrupt request generated during period 1 is set to “1” at timing point IR1.
(2) The interrupt request bit for an interrupt request generated during period 2 is set to “1” at timing point IR1 or IR2.
The timing point at which the bit is set to “1” varies depending on conditions. When two or more interrupt
requests are generated during the period 2, each request bit may be set to “1” at timing point IR1 or IR2
separately.
Fig. 24 Timing of interrupt request generation, interrupt request bit, and interrupt acceptance
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 29 of 128
3804 Group (Spec.L)
TIMERS
• 8-bit Timers
The 3804 group (Spec.L) has four 8-bit timers: timer 1, timer 2,
timer X, and timer Y.
The timer 1 and timer 2 use one prescaler in common, and the
timer X and timer Y use each prescaler. Those are 8-bit
prescalers. Each of the timers and prescalers has a timer latch or
a prescaler latch.
The division ratio of each timer or prescaler is given by 1/(n + 1),
where n is the value in the corresponding timer or prescaler latch.
All timers are down-counters. When the timer reaches “0016”, an
underflow occurs at the next count pulse and the contents of the
corresponding timer latch are reloaded into the timer and the
count is continued. When the timer underflows, the interrupt
request bit corresponding to that timer is set to “1”.
• Timer divider
The divider count source is switched by the main clock division
ratio selection bits of CPU mode register (bits 7 and 6 at address
003B16). When these bits are “00” (high-speed mode) or “01”
(middle-speed mode), XIN is selected. When these bits are “10”
(low-speed mode), XCIN is selected.
• Prescaler 12
The prescaler 12 counts the output of the timer divider. The
count source is selected by the timer 12, X count source selection
register among 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256,
1/512, 1/1024 of f(XIN) or f(XCIN).
• Timer 1 and Timer 2
The timer 1 and timer 2 counts the output of prescaler 12 and
periodically set the interrupt request bit.
• Prescaler X and prescaler Y
The prescaler X and prescaler Y count the output of the timer
divider or f(XCIN). The count source is selected by the timer 12,
X count source selection register (address 000E16) and the timer
Y, Z count source selection register (address 000F16) among 1/2,
1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256, 1/512, and 1/1024 of
f(XIN) or f(XCIN); and f(XCIN).
• Timer X and Timer Y
The timer X and timer Y can each select one of four operating
modes by setting the timer XY mode register (address 002316).
(1) Timer mode
• Mode selection
This mode can be selected by setting “00” to the timer X
operating mode bits (bits 1 and 0) and the timer Y operating
mode bits (bits 5 and 4) of the timer XY mode register (address
002316).
• Explanation of operation
The timer count operation is started by setting “0” to the timer X
count stop bit (bit 3) and the timer Y count stop bit (bit 7) of the
timer XY mode register (address 002316).
When the timer reaches “0016”, an underflow occurs at the next
count pulse and the contents of timer latch are reloaded into the
timer and the count is continued.
(2) Pulse Output Mode
• Mode selection
This mode can be selected by setting “01” to the timer X
operating mode bits (bits 1 and 0) and the timer Y operating
mode bits (bits 5 and 4) of the timer XY mode register (address
002316).
• Explanation of operation
The operation is the same as the timer mode’s. Moreover the
pulse which is inverted each time the timer underflows is output
from CNTR0/CNTR1 pin. Regardless of the timer counting or
not the output of CNTR0/CNTR1 pin is initialized to the level of
specified by their active edge switch bits when writing to the
timer. When the CNTR0 active edge switch bit (bit 2) and the
CNTR1 active edge switch bit (bit 6) of the timer XY mode
register (address 002316) is “0”, the output starts with “H” level.
When it is “1”, the output starts with “L” level.
Switching the CNTR 0 or CNTR 1 active edge switch bit will
reverse the output level of the corresponding CNTR0 or CNTR1
pin.
• Precautions
Set the double-function port of CNTR0 /CNTR 1 pin and port
P54/P55 to output in this mode.
(3) Event Counter Mode
• Mode selection
This mode can be selected by setting “10” to the timer X
operating mode bits (bits 1 and 0) and the timer Y operating
mode bits (bits 5 and 4) of the timer XY mode register (address
002316).
• Explanation of operation
The operation is the same as the timer mode’s except that the
timer counts signals input from the CNTR0 or CNTR1 pin. The
valid edge for the count operation depends on the CNTR0 active
edge switch bit (bit 2) or the CNTR1 active edge switch bit (bit 6)
of the timer XY mode register (address 002316). When it is “0”,
the rising edge is valid. When it is “1”, the falling edge is valid.
• Precautions
Set the double-function port of CNTR0 /CNTR 1 pin and port
P54/P55 to input in this mode.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 30 of 128
3804 Group (Spec.L)
(4) Pulse Width Measurement Mode
• Mode selection
This mode can be selected by setting “11” to the timer X
operating mode bits (bits 1 and 0) and the timer Y operating
mode bits (bits 5 and 4) of the timer XY mode register (address
002316).
• Explanation of operation
When the CNTR0 active edge switch bit (bit 2) or the CNTR1
active edge switch bit (bit 6) of the timer XY mode register
(address 002316) is “1”, the timer counts during the term of one
falling edge of CNTR0/CNTR1 pin input until the next rising
edge of input (“L” term). When it is “0”, the timer counts during
the term of one rising edge input until the next falling edge input
(“H” term).
• Precautions
Set the double-function port of CNTR0 /CNTR 1 pin and port
P54/P55 to input in this mode.
The count operation can be stopped by setting “1” to the timer X
count stop bit (bit 3) and the timer Y count stop bit (bit 7) of the
timer XY mode register (address 002316). The interrupt request
bit is set to “1” each time the timer underflows.
• Precautions when switching count source
When switching the count source by the timer 12, X and Y count
source selection bits, the value of timer count is altered in
inconsiderable amount owing to generating of thin pulses on the
count input signals.
Therefore, select the timer count source before setting the value
to the prescaler and the timer.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 31 of 128
3804 Group (Spec.L)
XIN
“00”
“01”
(1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256, 1/512, 1/1024)
Divider
Count source
selection bit
Clock for timer X
Clock for timer Y
Main clock
division ratio
selection bits
Clock for timer 12
XCIN
“10”
Data bus
Prescaler X latch (8)
f(XCIN)
Prescaler X (8)
CNTR0 active
edge switch bit
“0”
P54/CNTR0
Timer X latch (8)
Pulse width
Timer mode
measurement Pulse output mode
mode
Event
counter
mode
Timer X (8)
To timer X interrupt
request bit
Timer X count stop bit
To CNTR0 interrupt
request bit
“1”
CNTR0 active
edge switch bit
Q
“0”
Port P54
latch
Port P54
direction register
“1”
Toggle flip-flop T
Q
R
Timer X latch write pulse
Pulse output mode
Pulse output mode
Data bus
Count source selection bit
Clock for timer Y
Prescaler Y latch (8)
f(XCIN)
Prescaler Y (8)
CNTR1 active
edge switch bit
“0”
P55/CNTR1
Timer Y latch (8)
Pulse width
Timer mode
measurement Pulse output mode
mode
Event
counter
mode
Timer Y (8)
To timer Y interrupt
request bit
Timer Y count stop bit
To CNTR1 interrupt
request bit
“1”
CNTR1 active
edge switch bit
“1”
Q
Toggle flip-flop T
Q
“0”
Port P55
latch
Port P55
direction register
R
Timer Y latch write pulse
Pulse output mode
Pulse output mode
Data bus
Prescaler 12 latch (8)
Clock for timer 12
Prescaler 12 (8)
Timer 1 latch (8)
Timer 2 latch (8)
Timer 1 (8)
Timer 2 (8)
To timer 2 interrupt
request bit
To timer 1 interrupt
request bit
Fig. 25 Block diagram of timer X, timer Y, timer 1, and timer 2
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 32 of 128
3804 Group (Spec.L)
b7
b0
Timer XY mode register
(TM : address 002316)
Timer X operating mode bits
b1 b0
0 0: Timer mode
0 1: Pulse output mode
1 0: Event counter mode
1 1: Pulse width measurement mode
CNTR0 active edge switch bit
0: Interrupt at falling edge
Count at rising edge in event counter mode
1: Interrupt at rising edge
Count at falling edge in event counter mode
Timer X count stop bit
0: Count start
1: Count stop
Timer Y operating mode bits
b5 b4
0 0: Timer mode
0 1: Pulse output mode
1 0: Event counter mode
1 1: Pulse width measurement mode
CNTR1 active edge switch bit
0: Interrupt at falling edge
Count at rising edge in event counter mode
1: Interrupt at rising edge
Count at falling edge in event counter mode
Timer Y count stop bit
0: Count start
1: Count stop
Fig. 26 Structure of timer XY mode register
Rev.1.00 Oct 27, 2008
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Page 33 of 128
3804 Group (Spec.L)
b7
b0
Timer 12, X count source selection register
(T12XCSS : address 000E16)
Timer 12 count source selection bits
b3 b2 b1 b0
0 0 0 0 : f(XIN)/2 or f(XCIN)/2
0 0 0 1 : f(XIN)/4 or f(XCIN)/4
0 0 1 0 : f(XIN)/8 or f(XCIN)/8
0 0 1 1 : f(XIN)/16 or f(XCIN)/16
0 1 0 0 : f(XIN)/32 or f(XCIN)/32
0 1 0 1 : f(XIN)/64 or f(XCIN)/64
0 1 1 0 : f(XIN)/128 or f(XCIN)/128
0 1 1 1 : f(XIN)/256 or f(XCIN)/256
1 0 0 0 : f(XIN)/512 or f(XCIN)/512
1 0 0 1 : f(XIN)/1024 or f(XCIN)/1024
Timer X count source selection bits
b7 b6 b5 b4
0 0 0 0 : f(XIN)/2 or f(XCIN)/2
0 0 0 1 : f(XIN)/4 or f(XCIN)/4
0 0 1 0 : f(XIN)/8 or f(XCIN)/8
0 0 1 1 : f(XIN)/16 or f(XCIN)/16
0 1 0 0 : f(XIN)/32 or f(XCIN)/32
0 1 0 1 : f(XIN)/64 or f(XCIN)/64
0 1 1 0 : f(XIN)/128 or f(XCIN)/128
0 1 1 1 : f(XIN)/256 or f(XCIN)/256
1 0 0 0 : f(XIN)/512 or f(XCIN)/512
1 0 0 1 : f(XIN)/1024 or f(XCIN)/1024
1 0 1 0 : f(XCIN)
b7
1010:
1011:
1100:
1101:
1110:
1111:
Not used
1011:
1100:
1101:
1110:
1111:
Not used
1011:
1100:
1101:
1110:
1111:
Not used
1011:
1100:
1101:
1110:
1111:
Not used
b0
Timer Y, Z count source selection register
(TYZCSS : address 000F16)
Timer Y count source selection bits
b3 b2 b1 b0
0 0 0 0 : f(XIN)/2 or f(XCIN)/2
0 0 0 1 : f(XIN)/4 or f(XCIN)/4
0 0 1 0 : f(XIN)/8 or f(XCIN)/8
0 0 1 1 : f(XIN)/16 or f(XCIN)/16
0 1 0 0 : f(XIN)/32 or f(XCIN)/32
0 1 0 1 : f(XIN)/64 or f(XCIN)/64
0 1 1 0 : f(XIN)/128 or f(XCIN)/128
0 1 1 1 : f(XIN)/256 or f(XCIN)/256
1 0 0 0 : f(XIN)/512 or f(XCIN)/512
1 0 0 1 : f(XIN)/1024 or f(XCIN)/1024
1 0 1 0 : f(XCIN)
Timer Z count source selection bits
b7 b6 b5 b4
0 0 0 0 : f(XIN)/2 or f(XCIN)/2
0 0 0 1 : f(XIN)/4 or f(XCIN)/4
0 0 1 0 : f(XIN)/8 or f(XCIN)/8
0 0 1 1 : f(XIN)/16 or f(XCIN)/16
0 1 0 0 : f(XIN)/32 or f(XCIN)/32
0 1 0 1 : f(XIN)/64 or f(XCIN)/64
0 1 1 0 : f(XIN)/128 or f(XCIN)/128
0 1 1 1 : f(XIN)/256 or f(XCIN)/256
1 0 0 0 : f(XIN)/512 or f(XCIN)/512
1 0 0 1 : f(XIN)/1024 or f(XCIN)/1024
1 0 1 0 : f(XCIN)
Fig. 27 Structure of timer 12, X and timer Y, Z count source selection registers
Rev.1.00 Oct 27, 2008
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Page 34 of 128
3804 Group (Spec.L)
• 16-bit Timer
The timer Z is a 16-bit timer. When the timer reaches “000016”,
an underflow occurs at the next count pulse and the
corresponding timer latch is reloaded into the timer and the count
is continued. When the timer underflows, the interrupt request bit
corresponding to the timer Z is set to “1”.
When reading/writing to the timer Z, perform reading/writing to
both the high-order byte and the low-order byte. When reading
the timer Z, read from the high-order byte first, followed by the
low-order byte. Do not perform the writing to the timer Z
between read operation of the high-order byte and read operation
of the low-order byte. When writing to the timer Z, write to the
low-order byte first, followed by the high-order byte. Do not
perform the reading to the timer Z between write operation of the
low-order byte and write operation of the high-order byte.
The timer Z can select the count source by the timer Z count
source selection bits of timer Y, Z count source selection register
(bits 7 to 4 at address 000F16).
Timer Z can select one of seven operating modes by setting the
timer Z mode register (address 002A16).
(1) Timer mode
• Mode selection
This mode can be selected by setting “000” to the timer Z
operating mode bits (bits 2 to 0) and setting “0” to the
timer/event counter mode switch bit (b7) of the timer Z mode
register (address 002A16).
• Count source selection
In high- or middle-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64,
1/128, 1/256, 1/512 or 1/1024 of f(X IN ); or f(X CIN ) can be
selected as the count source.
In low-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256,
1/512 or 1/1024 of f(XCIN ); or f(XCIN) can be selected as the
count source.
• Interrupt
When an underflow occurs, the INT0/timer Z interrupt request bit
(bit 0) of the interrupt request register 1 (address 003C16) is set to
“1”.
• Explanation of operation
During timer stop, usually write data to a latch and a timer at the
same time to set the timer value.
The timer count operation is started by setting “0” to the timer Z
count stop bit (bit 6) of the timer Z mode register (address
002A16).
When the timer reaches “000016”, an underflow occurs at the
next count pulse and the contents of timer latch are reloaded into
the timer and the count is continued.
When writing data to the timer during operation, the data is
written only into the latch. Then the new latch value is reloaded
into the timer at the next underflow.
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Page 35 of 128
(2) Event counter mode
• Mode selection
This mode can be selected by setting “000” to the timer Z
operating mode bits (bits 2 to 0) and setting “1” to the
timer/event counter mode switch bit (bit 7) of the timer Z mode
register (address 002A16).
The valid edge for the count operation depends on the CNTR2
active edge switch bit (bit 5) of the timer Z mode register
(address 002A16). When it is “0”, the rising edge is valid. When
it is “1”, the falling edge is valid.
• Interrupt
The interrupt at an underflow is the same as the timer mode’s.
• Explanation of operation
The operation is the same as the timer mode’s.
Set the double-function port of CNTR2 pin and port P47 to input
in this mode.
Figure 30 shows the timing chart of the timer/event counter
mode.
(3) Pulse output mode
• Mode selection
This mode can be selected by setting “001” to the timer Z
operating mode bits (bits 2 to 0) and setting “0” to the
timer/event counter mode switch bit (b7) of the timer Z mode
register (address 002A16).
• Count source selection
In high- or middle-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64,
1/128, 1/256, 1/512 or 1/1024 of f(X IN ); or f(X CIN ) can be
selected as the count source.
In low-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256,
1/512 or 1/1024 of f(XCIN ); or f(XCIN) can be selected as the
count source.
• Interrupt
The interrupt at an underflow is the same as the timer mode’s.
• Explanation of operation
The operation is the same as the timer mode’s. Moreover the
pulse which is inverted each time the timer underflows is output
from CNTR2 pin. When the CNTR2 active edge switch bit (bit 5)
of the timer Z mode register (address 002A16) is “0”, the output
starts with “H” level. When it is “1”, the output starts with “L”
level.
• Precautions
The double-function port of CNTR 2 pin and port P4 7 is
automatically set to the timer pulse output port in this mode.
The output from CNTR2 pin is initialized to the level depending
on CNTR2 active edge switch bit by writing to the timer.
When the value of the CNTR2 active edge switch bit is changed,
the output level of CNTR2 pin is inverted.
Figure 31 shows the timing chart of the pulse output mode.
3804 Group (Spec.L)
(4) Pulse period measurement mode
• Mode selection
This mode can be selected by setting “010” to the timer Z
operating mode bits (bits 2 to 0) and setting “0” to the
timer/event counter mode switch bit (b7) of the timer Z mode
register (address 002A16).
(5) Pulse width measurement mode
• Mode selection
This mode can be selected by setting “011” to the timer Z
operating mode bits (bits 2 to 0) and setting “0” to the
timer/event counter mode switch bit (b7) of the timer Z mode
register (address 002A16).
• Count source selection
In high- or middle-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64,
1/128, 1/256, 1/512 or 1/1024 of f(X IN ); or f(X CIN ) can be
selected as the count source.
In low-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256,
1/512 or 1/1024 of f(XCIN ); or f(XCIN) can be selected as the
count source.
• Count source selection
In high- or middle-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64,
1/128, 1/256, 1/512 or 1/1024 of f(X IN ); or f(X CIN ) can be
selected as the count source.
In low-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256,
1/512 or 1/1024 of f(XCIN ); or f(XCIN) can be selected as the
count source.
• Interrupt
The interrupt at an underflow is the same as the timer mode’s.
When the pulse period measurement is completed, the
INT4/CNTR2 interrupt request bit (bit 5) of the interrupt request
register 2 (address 003D16) is set to “1”.
• Interrupt
The interrupt at an underflow is the same as the timer mode’s.
When the pulse widths measurement is completed, the
INT4/CNTR2 interrupt request bit (bit 5) of the interrupt request
register 2 (address 003D16) is set to “1”.
• Explanation of operation
The cycle of the pulse which is input from the CNTR 2 pin is
measured. When the CNTR2 active edge switch bit (bit 5) of the
timer Z mode register (address 002A16) is “0”, the timer counts
during the term from one falling edge of CNTR2 pin input to the
next falling edge. When it is “1”, the timer counts during the
term from one rising edge input to the next rising edge input.
When the valid edge of measurement completion/start is
detected, the 1’s complement of the timer value is written to the
timer latch and “FFFF16” is set to the timer.
Furthermore when the timer underflows, the timer Z interrupt
request occurs and “FFFF16” is set to the timer. When reading
the timer Z, the value of the timer latch (measured value) is read.
The measured value is retained until the next measurement
completion.
• Explanation of operation
The pulse width which is input from the CNTR2 pin is measured.
When the CNTR2 active edge switch bit (bit 5) of the timer Z
mode register (address 002A16) is “0”, the timer counts during
the term from one rising edge input to the next falling edge input
(“H” term). When it is “1”, the timer counts during the term from
one falling edge of CNTR2 pin input to the next rising edge of
input (“L” term).
When the valid edge of measurement completion is detected, the
1’s complement of the timer value is written to the timer latch.
When the valid edge of measurement completion/start is
detected, “FFFF16” is set to the timer.
When the timer Z underflows, the timer Z interrupt occurs and
“FFFF16” is set to the timer Z. When reading the timer Z, the
value of the timer latch (measured value) is read. The measured
value is retained until the next measurement completion.
• Precautions
Set the double-function port of CNTR2 pin and port P47 to input
in this mode.
A read-out of timer value is impossible in this mode. The timer
can be written to only during timer stop (no measurement of
pulse period).
Since the timer latch in this mode is specialized for the read-out
of measured values, do not perform any write operation during
measurement.
“FFFF16” is set to the timer when the timer underflows or when
the valid edge of measurement start/completion is detected.
Consequently, the timer value at start of pulse period
m e a s u r em e n t d e p e n d s o n t h e t i m e r v a l u e j u s t b ef o r e
measurement start.
Figure 32 shows the timing chart of the pulse period
measurement mode.
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REJ03B0266-0100
Page 36 of 128
• Precautions
Set the double-function port of CNTR2 pin and port P47 to input
in this mode.
A read-out of timer value is impossible in this mode. The timer
can be written to only during timer stop (no measurement of
pulse widths).
Since the timer latch in this mode is specialized for the read-out
of measured values, do not perform any write operation during
measurement.
“FFFF16” is set to the timer when the timer underflows or when
the valid edge of measurement start/completion is detected.
Consequently, the timer value at start of pulse width
m e a s u r em e n t d ep e n d s o n t h e t i m e r v a l u e j u s t b ef o r e
measurement start.
Figure 33 shows the timing chart of the pulse width measurement
mode.
3804 Group (Spec.L)
(6) Programmable waveform generating mode
• Mode selection
This mode can be selected by setting “100” to the timer Z
operating mode bits (bits 2 to 0) and setting “0” to the
timer/event counter mode switch bit (b7) of the timer Z mode
register (address 002A16).
• Count source selection
In high- or middle-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64,
1/128, 1/256, 1/512 or 1/1024 of f(X IN ); or f(X CIN ) can be
selected as the count source.
In low-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256,
1/512 or 1/1024 of f(XCIN ); or f(XCIN) can be selected as the
count source.
• Interrupt
The interrupt at an underflow is the same as the timer mode’s.
• Explanation of operation
The operation is the same as the timer mode’s. Moreover the
timer outputs the data set in the output level latch (bit 4) of the
timer Z mode register (address 002A16) from the CNTR2 pin
each time the timer underflows.
Changing the value of the output level latch and the timer latch
after an underflow makes it possible to output an optional
waveform from the CNTR2 pin.
• Precautions
The double-function port of CNTR 2 pin and port P4 7 is
automatically set to the programmable waveform generating port
in this mode.
Figure 34 shows the timing chart of the programmable waveform
generating mode.
(7) Programmable one-shot generating mode
• Mode selection
This mode can be selected by setting “101” to the timer Z
operating mode bits (bits 2 to 0) and setting “0” to the
timer/event counter mode switch bit (b7) of the timer Z mode
register (address 002A16).
• Count source selection
In high- or middle-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64,
1/128, 1/256, 1/512 or 1/1024 of f(X IN ); or f(X CIN ) can be
selected as the count source.
• Interrupt
The interrupt at an underflow is the same as the timer mode’s.
The trigger to generate one-shot pulse can be selected by the INT1
active edge selection bit (bit 1) of the interrupt edge selection
register (address 003A16). When it is “0”, the falling edge active is
selected; when it is “1”, the rising edge active is selected.
When the valid edge of the INT 1 pin is detected, the INT 1
interrupt request bit (bit 1) of the interrupt request register 1
(address 003C16) is set to “1”.
• Explanation of operation
1. “H” one-shot pulse; Bit 5 of timer Z mode register = “0”
The output level of the CNTR2 pin is initialized to “L” at
mode selection. When trigger generation (input signal to
INT1 pin) is detected, “H” is output from the CNTR2 pin.
When an underflow occurs, “L” is output. The “H” one-shot
pulse width is set by the setting value to the timer Z register
low-order and high-order. When trigger generating is
detected during timer count stop, although “H” is output
from the CNTR2 pin, “H” output state continues because an
underflow does not occur.
Rev.1.00 Oct 27, 2008
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Page 37 of 128
2. “L” one-shot pulse; Bit 5 of timer Z mode register = “1”
The output level of the CNTR2 pin is initialized to “H” at
mode selection. When trigger generation (input signal to
INT1 pin) is detected, “L” is output from the CNTR2 pin.
When an underflow occurs, “H” is output. The “L” one-shot
pulse width is set by the setting value to the timer Z loworder and high-order. When trigger generating is detected
during timer count stop, although “L” is output from the
CNTR2 pin, “L” output state continues because an underflow does not occur.
• Precautions
Set the double-function port of INT1 pin and port P42 to input in
this mode.
The double-function port of CNTR 2 pin and port P4 7 is
automatically set to the programmable one-shot generating port
in this mode.
This mode cannot be used in low-speed mode.
If the value of the CNTR2 active edge switch bit is changed
during one-shot generating enabled or generating one-shot pulse,
then the output level from CNTR2 pin changes.
Figure 35 shows the timing chart of the programmable one-shot
generating mode.
3804 Group (Spec.L)
<Notes regarding all modes>
• Timer Z write control
Which write control can be selected by the timer Z write control
bit (bit 3) of the timer Z mode register (address 002A16), writing
data to both the latch and the timer at the same time or writing
data only to the latch.
When the operation “writing data only to the latch” is selected,
the value is set to the timer latch by writing data to the address of
timer Z and the timer is updated at next underflow. After reset
release, the operation “writing data to both the latch and the timer
at the same time” is selected, and the value is set to both the latch
and the timer at the same time by writing data to the address of
timer Z.
In the case of writing data only to the latch, if writing data to the
latch and an underflow are performed almost at the same time,
the timer value may become undefined.
• Switch of interrupt active edge of CNTR2 and INT1
Each interrupt active edge depends on setting of the CNTR2
active edge switch bit and the INT1 active edge selection bit.
• Switch of count source
When switching the count source by the timer Z count source
selection bits, the value of timer count is altered in
inconsiderable amount owing to generating of thin pulses on the
count input signals.
Therefore, select the timer count source before setting the value
to the prescaler and the timer.
• Usage of CNTR2 pin as normal I/O port P47
To use the CNTR 2 pin as normal I/O port P4 7 , set timer Z
operating mode bits (b2, b1, b0) of timer Z mode register
(address 002A16) to “000”.
• Timer Z read control
A read-out of timer value is impossible in pulse period
measurement mode and pulse width measurement mode. In the
other modes, a read-out of timer value is possible regardless of
count operating or stopped.
However, a read-out of timer latch value is impossible.
CNTR2 active edge
Data bus
switch bit
Programmable one-shot
“1” generating mode
P42/INT1
Programmable one-shot
generating circuit
Programmable one-shot
generating mode
“0”
Programmable waveform
generating mode
D
Output level latch
To INT1 interrupt
request bit
Q
T
Pulse output mode
S
Q
T
Q
“001”
CNTR2 active edge switch bit
“0”
“1” Pulse output mode
“100”
“101”
Timer Z operating
mode bits
Port P47
latch
Timer Z low-order latch
Timer Z high-order latch
Timer Z low-order
Timer Z high-order
To timer Z interrupt
request bit
Port P47
direction register
Pulse period measurement mode
Pulse width measurement mode
Edge detection circuit
“1”
“0”
CNTR2 active edge
switch bit
XIN
XCIN
Clock for timer z
P47/SRDY2/
CNTR2
“1”
“0”
Timer Z count stop bit
Timer/Event
counter mode
switch bit
Count source
Divider
selection bit
(1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256, 1/512, 1/1024)
Fig. 28 Block diagram of timer Z
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
f(XCIN)
Page 38 of 128
To CNTR2 interrupt
request bit
3804 Group (Spec.L)
b7
b0
Timer Z mode register
(TZM : address 002A16)
Timer Z operating mode bits
b2 b1 b0
0 0 0 : Timer/Event counter mode
0 0 1 : Pulse output mode
0 1 0 : Pulse period measurement mode
0 1 1 : Pulse width measurement mode
1 0 0 : Programmable waveform generating mode
1 0 1 : Programmable one-shot generating mode
1 1 0 : Not available
1 1 1 : Not available
Timer Z write control bit
0 : Writing data to both latch and timer simultaneously
1 : Writing data only to latch
Output level latch
0 : “L” output
1 : “H” output
CNTR2 active edge switch bit
0 : •Event counter mode: Count at rising edge
•Pulse output mode: Start outputting “H”
•Pulse period measurement mode: Measurement between two falling edges
•Pulse width measurement mode: Measurement of “H” term
•Programmable one-shot generating mode: After start outputting “L”,
“H” one-shot pulse generated
•Interrupt at falling edge
1 : •Event counter mode: Count at falling edge
•Pulse output mode: Start outputting “L”
•Pulse period measurement mode: Measurement between two rising edges
•Pulse width measurement mode: Measurement of “L” term
•Programmable one-shot generating mode: After start outputting “H”,
“L” one-shot pulse generated
•Interrupt at rising edge
Timer Z count stop bit
0 : Count start
1 : Count stop
Timer/Event counter mode switch bit (1)
0 : Timer mode
1 : Event counter mode
Note 1: When selecting the modes except the timer/event counter mode, set “0” to this bit.
Fig. 29 Structure of timer Z mode register
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Page 39 of 128
3804 Group (Spec.L)
FFFF16
TL
000016
TR
TR
TR
TL : Value set to timer latch
TR : Timer interrupt request
Fig. 30 Timing chart of timer/event counter mode
FFFF16
TL
000016
TR
Waveform output
from CNTR2 pin
CNTR2
TR
TR
TR
CNTR2
TL : Value set to timer latch
TR : Timer interrupt request
CNTR2 : CNTR2 interrupt request
(CNTR2 active edge switch bit = “0”; Falling edge active)
Fig. 31 Timing chart of pulse output mode
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REJ03B0266-0100
Page 40 of 128
3804 Group (Spec.L)
000016
T3
T2
T1
FFFF16
TR
FFFF16 + T1
TR
T2
T3
FFFF16
Signal input from
CNTR2 pin
CNTR2 CNTR2
CNTR2
CNTR2
CNTR2 of rising edge active
TR : Timer interrupt request
CNTR2 : CNTR2 interrupt request
Fig. 32 Timing chart of pulse period measurement mode (Measuring term between two rising edges)
000016
T3
T2
T1
FFFF16
TR
Signal input from
CNTR2 pin
FFFF16 + T2
T3
CNTR2
T1
CNTR2
CNTR2
CNTR2 interrupt of rising edge active; Measurement of “L” width
TR : Timer interrupt request
CNTR2 : CNTR2 interrupt request
Fig. 33 Timing chart of pulse width measurement mode (Measuring “L” term)
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Page 41 of 128
3804 Group (Spec.L)
FFFF16
T3
L
T2
T1
000016
Signal output from
CNTR2 pin
L
T3
T1
TR
TR
CNTR2
T2
TR
TR
CNTR2
L : Timer initial value
TR : Timer interrupt request
CNTR2 : CNTR2 interrupt request
(CNTR2 active edge switch bit = “0”; Falling edge active)
Fig. 34 Timing chart of programmable waveform generating mode
FFFF16
L
TR
Signal input from
INT1 pin
Signal output from
CNTR2 pin
TR
L
L
L
CNTR2
TR
CNTR2
L : One-shot pulse width
TR : Timer interrupt request
CNTR2 : CNTR2 interrupt request
(CNTR2 active edge switch bit = “0”; Falling edge active)
Fig. 35 Timing chart of programmable one-shot generating mode (“H” one-shot pulse generating)
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3804 Group (Spec.L)
SERIAL INTERFACE
• Serial I/O1
Serial I/O1 can be used as either clock synchronous or
asynchronous (UART) serial I/O. A dedicated timer is also
provided for baud rate generation.
(1) Clock Synchronous Serial I/O Mode
Clock synchronous serial I/O1 mode can be selected by setting
the serial I/O1 mode selection bit of the serial I/O1 control
register (bit 6 of address 001A16) to “1”.
For clock synchronous serial I/O, the transmitter and the receiver
must use the same clock. If an internal clock is used, transfer is
started by a write signal to the transmit/receive buffer register.
Data bus
Serial I/O1 control register
Address 001816
Receive buffer register 1
Receive buffer full flag (RBF)
Receive shift register 1
P44/RXD1
Address 001A16
Receive interrupt request (RI)
Shift clock
Clock control circuit
P46/SCLK1
BRG count source selection bit
f(XIN)
Serial I/O1 synchronous clock selection bit
Frequency division ratio 1/(n+1)
Baud rate generator 1
1/4
(f(XCIN) in low-speed mode)
Address 001C16
1/4
P47/SRDY1
F/F
Falling-edge detector
Clock control circuit
Shift clock
P45/TXD1
Transmit shift completion flag (TSC)
Transmit interrupt source selection bit
Transmit interrupt request (TI)
Transmit shift register 1
Transmit buffer register 1
Transmit buffer empty flag (TBE)
Serial I/O1 status register
Address 001816
Address 001916
Data bus
Fig. 36 Block diagram of clock synchronous serial I/O1
Transfer shift clock
(1/2 to 1/2048 of the internal
clock, or an external clock)
Serial output TXD1
D0
D1
D2
D3
D4
D5
D6
D7
Serial input RXD1
D0
D1
D2
D3
D4
D5
D6
D7
Receive enable signal SRDY1
Write pulse to receive/transmit
buffer register 1 (address 001816)
TBE = 0
TBE = 1
TSC = 0
RBF = 1
TSC = 1
Overrun error (OE)
detection
Notes 1: As the transmit interrupt (TI), which can be selected, either when the transmit buffer has emptied (TBE=1) or after the transmit
shift operation has ended (TSC=1), by setting the transmit interrupt source selection bit (TIC) of the serial I/O1 control register.
2: If data is written to the transmit buffer register when TSC=0, the transmit clock is generated continuously and serial data is output
continuously from the TXD pin.
3: The receive interrupt (RI) is set when the receive buffer full flag (RBF) becomes “1”.
Fig. 37 Operation of clock synchronous serial I/O1
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3804 Group (Spec.L)
(2) Asynchronous Serial I/O (UART) Mode
Clock asynchronous serial I/O mode (UART) can be selected by
clearing the serial I/O1 mode selection bit (b6) of the serial I/O1
control register to “0”.
Eight serial data transfer formats can be selected, and the transfer
formats used by a transmitter and receiver must be identical.
The transmit and receive shift registers each have a buffer, but
the two buffers have the same address in a memory. Since the
shift register cannot be written to or read from directly, transmit
data is written to the transmit buffer register, and receive data is
read from the receive buffer register.
The transmit buffer register can also hold the next data to be
transmitted, and the receive buffer register can hold a character
while the next character is being received.
Data bus
Address 001816
Receive buffer register 1
OE
Serial I/O1 control register Address 001A16
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Character length selection bit
P44/RXD1
ST detector
7 bits
Receive shift register 1
1/16
8 bits
PE FE
UART1 control register
SP detector
Address 001B16
Clock control circuit
Serial I/O1 synchronous clock selection bit
P46/SCLK1
BRG count source selection bit
f(XIN)
(f(XCIN) in low-speed mode)
1/4
Frequency division ratio 1/(n+1)
Baud rate generator
Address 001C16
ST/SP/PA generator
Transmit shift
completion flag (TSC)
1/16
P45/TXD1
Transmit shift register 1
Transmit interrupt source selection bit
Transmit interrupt request (TI)
Character length selection bit
Transmit buffer empty flag (TBE)
Transmit buffer register 1
Serial I/O1 status register
Address 001816
Address 001916
Data bus
Fig. 38 Block diagram of UART serial I/O1
Transmit or
receive clock
Transmit buffer
write signal
TBE=0
TSC=0
TBE=1
Serial output
TXD1
TBE=0
TBE=1
ST
D0
D1
SP
TSC=1*
ST
D0
D1
SP
Generated at 2nd bit in 2-stop-bit mode
1 start bit
7 or 8 data bit
1 or 0 parity bit
1 or 2 stop bit (s)
Receive buffer
read signal
RBF=0
RBF=1
Serial input
RXD1
ST
D0
D1
SP
RBF=1
ST
D0
D1
SP
Notes 1: Error flag detection occurs at the same time that the RBF flag becomes “1” (at 1st stop bit, during reception).
2: As the transmit interrupt (TI), when either the TBE or TSC flag becomes “1”, can be selected to occur depending on the setting of the transmit interrupt source
selection bit (TIC) of the serial I/O1 control register.
3: The receive interrupt (RI) is set when the RBF flag becomes “1”.
4: After data is written to the transmit buffer when TSC=1, 0.5 to 1.5 cycles of the data shift cycle are necessary until changing to TSC=0.
Fig. 39 Operation of UART serial I/O1
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3804 Group (Spec.L)
[Transmit Buffer Register 1/Receive Buffer Register 1
(TB1/RB1)] 001816
The transmit buffer register 1 and the receive buffer register 1 are
located at the same address. The transmit buffer is write-only and
the receive buffer is read-only. If a character bit length is 7 bits,
the MSB of data stored in the receive buffer is “0”.
[Serial I/O1 Status Register (SIO1STS)] 001916
The read-only serial I/O1 status register consists of seven flags
(bits 0 to 6) which indicate the operating status of the serial I/O1
function and various errors.
Three of the flags (bits 4 to 6) are valid only in UART mode.
The receive buffer full flag (bit 1) is cleared to “0” when the
receive buffer register is read.
If there is an error, it is detected at the same time that data is
transferred from the receive shift register to the receive buffer
register, and the receive buffer full flag is set. A write to the
serial I/O1 status register clears all the error flags OE, PE, FE,
and SE (bit 3 to bit 6, respectively). Writing “0” to the serial I/O1
enable bit SIOE (bit 7 of the serial I/O1 control register) also
clears all the status flags, including the error flags.
Bits 0 to 6 of the serial I/O1 status register are initialized to “0” at
reset, but if the transmit enable bit (bit 4) of the serial I/O1
control register has been set to “1”, the transmit shift completion
flag (bit 2) and the transmit buffer empty flag (bit 0) become “1”.
[Serial I/O1 Control Register (SIO1CON)] 001A16
The serial I/O1 control register consists of eight control bits for
the serial I/O1 function.
[UART1 Control Register (UART1CON)] 001B16
The UART control register consists of four control bits (bits 0 to
3) which are valid when asynchronous serial I/O is selected and
set the data format of an data transfer, and one bit (bit 4) which is
always valid and sets the output structure of the P45/TXD1 pin.
[Baud Rate Generator 1 (BRG1)] 001C16
The baud rate generator determines the baud rate for serial
transfer.
The baud rate generator divides the frequency of the count source
by 1/(n + 1), where n is the value written to the baud rate
generator.
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3804 Group (Spec.L)
b7
b0
Serial I/O1 status register
(SIO1STS : address 001916)
b7
Transmit buffer empty flag (TBE)
0: Buffer full
1: Buffer empty
Receive buffer full flag (RBF)
0: Buffer empty
1: Buffer full
Transmit shift completion flag (TSC)
0: Transmit shift in progress
1: Transmit shift completed
Overrun error flag (OE)
0: No error
1: Overrun error
Parity error flag (PE)
0: No error
1: Parity error
Framing error flag (FE)
0: No error
1: Framing error
Summing error flag (SE)
0: (OE) U (PE) U (FE)=0
1: (OE) U (PE) U (FE)=1
Not used (returns “1” when read)
b7
b0
UART1 control register
(UART1CON : address 001B16)
Character length selection bit (CHAS)
0: 8 bits
1: 7 bits
Parity enable bit (PARE)
0: Parity checking disabled
1: Parity checking enabled
Parity selection bit (PARS)
0: Even parity
1: Odd parity
Stop bit length selection bit (STPS)
0: 1 stop bit
1: 2 stop bits
P45/TXD1 P-channel output disable bit (POFF)
0: CMOS output (in output mode)
1: N-channel open drain output (in output mode)
Not used (return “1” when read)
Fig. 40 Structure of serial I/O1 control registers
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b0
Serial I/O1 control register
(SIO1CON : address 001A16)
BRG count source selection bit (CSS)
0: f(XIN) (f(XCIN) in low-speed mode)
1: f(XIN)/4 (f(XCIN)/4 in low-speed mode)
Serial I/O1 synchronous clock selection bit (SCS)
0: BRG output divided by 4 when clock synchronous
serial I/O1 is selected, BRG output divided by 16
when UART is selected.
1: External clock input when clock synchronous serial
I/O1 is selected, external clock input divided by 16
when UART is selected.
SRDY1 output enable bit (SRDY)
0: P47 pin operates as normal I/O pin
1: P47 pin operates as SRDY1 output pin
Transmit interrupt source selection bit (TIC)
0: Interrupt when transmit buffer has emptied
1: Interrupt when transmit shift operation is completed
Transmit enable bit (TE)
0: Transmit disabled
1: Transmit enabled
Receive enable bit (RE)
0: Receive disabled
1: Receive enabled
Serial I/O1 mode selection bit (SIOM)
0: Clock asynchronous (UART) serial I/O
1: Clock synchronous serial I/O
Serial I/O1 enable bit (SIOE)
0: Serial I/O1 disabled
(pins P44 to P47 operate as normal I/O pins)
1: Serial I/O1 enabled
(pins P44 to P47 operate as serial I/O1 pins)
3804 Group (Spec.L)
<Notes concerning serial I/O1>
1. Notes when selecting clock synchronous serial I/O
1.1 Stop of transmission operation
• Note
Clear the serial I/O1 enable bit and the transmit enable bit to
“0” (serial I/O and transmit disabled).
2. Notes when selecting clock asynchronous serial I/O
2.1 Stop of transmission operation
• Note
Clear the transmit enable bit to “0” (transmit disabled). The
transmission operation does not stop by clearing the serial
I/O1 enable bit to “0”.
• Reason
Since transmission is not stopped and the transmission circuit
is not initialized even if only the serial I/O1 enable bit is
cleared to “0” (serial I/O disabled), the internal transmission is
running (in this case, since pins T X D 1 , RX D 1 , S CLK1 , and
S RDY1 function as I/O ports, the transmission data is not
output). When data is written to the transmit buffer register in
this state, data starts to be shifted to the transmit shift register.
When the serial I/O1 enable bit is set to “1” at this time, the
data during internally shifting is output to the TXD1 pin and an
operation failure occurs.
• Reason
Since transmission is not stopped and the transmission circuit
is not initialized even if only the serial I/O1 enable bit is
cleared to “0” (serial I/O disabled), the internal transmission is
running (in this case, since pins T X D 1 , RX D 1 , S CLK1 , and
S RDY1 function as I/O ports, the transmission data is not
output). When data is written to the transmit buffer register in
this state, data starts to be shifted to the transmit shift register.
When the serial I/O1 enable bit is set to “1” at this time, the
data during internally shifting is output to the TXD1 pin and an
operation failure occurs.
1.2 Stop of receive operation
• Note
Clear the receive enable bit to “0” (receive disabled), or clear
the serial I/O1 enable bit to “0” (serial I/O disabled).
2.2 Stop of receive operation
• Note
Clear the receive enable bit to “0” (receive disabled).
1.3 Stop of transmit/receive operation
• Note
Clear both the transmit enable bit and receive enable bit to “0”
(transmit and receive disabled).
(when data is transmitted and received in the clock
synchronous serial I/O mode, any one of data transmission and
reception cannot be stopped.)
• Reason
In the clock synchronous serial I/O mode, the same clock is
used for transmission and reception. If any one of transmission
and reception is disabled, a bit error occurs because
transmission and reception cannot be synchronized.
In this mode, the clock circuit of the transmission circuit also
operates for data reception. Accordingly, the transmission
circuit does not stop by clearing only the transmit enable bit to
“0” (transmit disabled). Also, the transmission circuit is not
initialized by clearing the serial I/O1 enable bit to “0” (serial
I/O disabled) (refer to 1.1).
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2.3 Stop of transmit/receive operation
• Note 1 (only transmission operation is stopped)
Clear the transmit enable bit to “0” (transmit disabled). The
transmission operation does not stop by clearing the serial
I/O1 enable bit to “0”.
• Reason
Since transmission is not stopped and the transmission circuit
is not initialized even if only the serial I/O1 enable bit is
cleared to “0” (serial I/O disabled), the internal transmission is
running (in this case, since pins T X D 1 , RX D 1 , S CLK1 , and
S RDY1 function as I/O ports, the transmission data is not
output). When data is written to the transmit buffer register in
this state, data starts to be shifted to the transmit shift register.
When the serial I/O1 enable bit is set to “1” at this time, the
data during internally shifting is output to the TXD1 pin and an
operation failure occurs.
• Note 2 (only receive operation is stopped)
Clear the receive enable bit to “0” (receive disabled).
3804 Group (Spec.L)
3. SRDY1 output of reception side
• Note
When signals are output from the SRDY1 pin on the reception
side by using an external clock in the clock synchronous serial
I/O mode, set all of the receive enable bit, the SRDY1 output
enable bit, and the transmit enable bit to “1” (transmit
enabled).
4. Setting serial I/O1 control register again
• Note
Set the serial I/O1 control register again after the transmission
and the reception circuits are reset by clearing both the
transmit enable bit and the receive enable bit to “0”.
Clear both the transmit enable
bit (TE) and the receive enable
bit (RE) to “0”
Set the bits 0 to 3 and bit 6 of
the serial I/O1 control register
Set both the transmit enable bit
(TE) and the receive enable bit
(RE), or one of them to “1”
Can be set with the
LDM instruction at
the same time
5.Data transmission control with referring to transmit shift
register completion flag
• Note
After the transmit data is written to the transmit buffer register,
the transmit shift register completion flag changes from “1” to
“0” with a delay of 0.5 to 1.5 shift clocks. When data
transmission is controlled with referring to the flag after
writing the data to the transmit buffer register, note the delay.
6. Transmission control when external clock is selected
• Note
When an external clock is used as the synchronous clock for
data transmission, set the transmit enable bit to “1” at “H” of
the SCLK1 input level. Also, write data to the transmit buffer
register at “H” of the SCLK1 input level.
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7. Transmit interrupt request when transmit enable bit is set
• Note
When using the transmit interrupt, take the following
sequence.
1. Set the serial I/O1 transmit interrupt enable bit to “0” (disabled).
2. Set the transmit enable bit to “1”.
3. Set the serial I/O1 transmit interrupt request bit to “0” after
1 or more instruction has executed.
4. Set the serial I/O1 transmit interrupt enable bit to “1”
(enabled).
• Reason
When the transmit enable bit is set to “1”, the transmit buffer
empty flag and the transmit shift register shift completion flag
are also set to “1”. Therefore, regardless of selecting which
timing for the generating of transmit interrupts, the interrupt
request is generated and the transmit interrupt request bit is set
at this point.
3804 Group (Spec.L)
• Serial I/O2
The serial I/O2 function can be used only for clock synchronous
serial I/O.
For clock synchronous serial I/O2, the transmitter and the
receiver must use the same clock. If the internal clock is used,
transfer is started by a write signal to the serial I/O2 register
(address 001F16).
b7
b0
Serial I/O2 control register
(SIO2CON : address 001D16)
Internal synchronous clock selection bits
b2 b1 b0
0 0 0: f(XIN)/8 (f(XCIN)/8 in low-speed mode)
0 0 1: f(XIN)/16 (f(XCIN)/16 in low-speed mode)
0 1 0: f(XIN)/32 (f(XCIN)/32 in low-speed mode)
0 1 1: f(XIN)/64 (f(XCIN)/64 in low-speed mode)
1 1 0: f(XIN)/128 f(XCIN)/128 in low-speed mode)
1 1 1: f(XIN)/256 (f(XCIN)/256 in low-speed mode)
Serial I/O2 port selection bit
0: I/O port
1: SOUT2, SCLK2 signal output
SRDY2 output enable bit
0: I/O port
1: SRDY2 signal output
Transfer direction selection bit
0: LSB first
1: MSB first
Serial I/O2 synchronous clock selection bit
0: External clock
1: Internal clock
P51/SOUT2 P-channel output disable bit
0: CMOS output (in output mode)
1: N-channel open drain output (in output mode)
[Serial I/O2 Control Register (SIO2CON)] 001D16
The serial I/O2 control register contains eight bits which control
various serial I/O2 functions.
Fig. 41 Structure of Serial I/O2 control register
Internal synchronous
clock selection bits
1/8
Divider
1/16
f(XIN)
(f(XCIN) in low-speed mode)
P53 latch
1/128
1/256
Synchronization
circuit
SCLK2
SRDY2
“1”
SRDY2 output enable bit
1/64
Serial I/O2 synchronous
clock selection bit
“1”
“0”
P53/SRDY2
Data bus
1/32
“0”
External clock
P52 latch
“0”
P52/SCLK2
“1”
Serial I/O2 port selection bit
P51 latch
Serial I/O counter 2 (3)
“0”
P51/SOUT2
“1”
Serial I/O2 port selection bit
Serial I/O2 register (8)
P50/SIN2
Address 001F16
Fig. 42 Block diagram of serial I/O2
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Serial I/O2
interrupt request
3804 Group (Spec.L)
Transfer clock (1)
Serial I/O2 register
write signal
(2)
Serial I/O2 output SOUT2
D0
D1
D2
D3
D4
D5
D6
D7
Serial I/O2 input SIN2
Receive enable signal SRDY2
Serial I/O2 interrupt request bit set
Notes 1: When the internal clock is selected as the transfer clock, the divide ratio of f(XIN), or (f(XCIN) in low-speed mode, can be selected by
setting bits 0 to 2 of the serial I/O2 control register.
2: When the internal clock is selected as the transfer clock, the SOUT2 pin goes to high impedance after transfer completion.
Fig. 43 Timing of serial I/O2
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3804 Group (Spec.L)
• Serial I/O3
Serial I/O3 can be used as either clock synchronous or
asynchronous (UART) serial I/O3. A dedicated timer is also
provided for baud rate generation.
(1) Clock Synchronous Serial I/O Mode
Clock synchronous serial I/O3 mode can be selected by setting
the serial I/O3 mode selection bit of the serial I/O3 control
register (bit 6 of address 003216) to “1”.
For clock synchronous serial I/O, the transmitter and the receiver
must use the same clock. If an internal clock is used, transfer is
started by a write signal to the transmit/receive buffer register.
Data bus
Serial I/O3 control register
Address 003016
Receive buffer register 3
Receive buffer full flag (RBF)
Receive shift register 3
P34/RXD3
Address 003216
Receive interrupt request (RI)
Shift clock
Clock control circuit
P36/SCLK3
BRG count source selection bit
f(XIN)
Serial I/O3 synchronous clock selection bit
Frequency division ratio 1/(n+1)
Baud rate generator 3
1/4
(f(XCIN) in low-speed mode)
Address 002F16
1/4
P37/SRDY3
F/F
Falling-edge detector
Clock control circuit
Shift clock
P35/TXD3
Transmit shift completion flag (TSC)
Transmit interrupt source selection bit
Transmit interrupt request (TI)
Transmit shift register 3
Transmit buffer register 3
Transmit buffer empty flag (TBE)
Serial I/O3 status register
Address 003016
Address 003116
Data bus
Fig. 44 Block diagram of clock synchronous serial I/O3
Transfer shift clock
(1/2 to 1/2048 of the internal
clock, or an external clock)
Serial output TXD3
D0
D1
D2
D3
D4
D5
D6
D7
Serial input RXD3
D0
D1
D2
D3
D4
D5
D6
D7
Receive enable signal SRDY3
Write pulse to receive/transmit
buffer register (address 003016)
TBE = 0
TBE = 1
TSC = 0
RBF = 1
TSC = 1
Overrun error (OE)
detection
Notes 1: As the transmit interrupt (TI), which can be selected, either when the transmit buffer has emptied (TBE=1) or after the transmit
shift operation has ended (TSC=1), by setting the transmit interrupt source selection bit (TIC) of the serial I/O3 control register.
2: If data is written to the transmit buffer register when TSC=0, the transmit clock is generated continuously and serial data is output
continuously from the TXD pin.
3: The receive interrupt (RI) is set when the receive buffer full flag (RBF) becomes “1”.
Fig. 45 Operation of clock synchronous serial I/O3
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3804 Group (Spec.L)
(2) Asynchronous Serial I/O (UART) Mode
Clock asynchronous serial I/O mode (UART) can be selected by
clearing the serial I/O3 mode selection bit (b6) of the serial I/O3
control register to “0”.
Eight serial data transfer formats can be selected, and the transfer
formats used by a transmitter and receiver must be identical.
The transmit and receive shift registers each have a buffer, but
the two buffers have the same address in a memory. Since the
shift register cannot be written to or read from directly, transmit
data is written to the transmit buffer register, and receive data is
read from the receive buffer register.
The transmit buffer register can also hold the next data to be
transmitted, and the receive buffer register can hold a character
while the next character is being received.
Data bus
Address 003016
Receive buffer register 3
OE
Serial I/O3 control register Address 003216
Receive buffer full flag (RBF)
Receive interrupt request (RI)
Character length selection bit
P34/RXD3
ST detector
7 bits
Receive shift register 3
1/16
8 bits
PE FE
UART3 control register
SP detector
Address 003316
Clock control circuit
Serial I/O3 synchronous clock selection bit
P36/SCLK3
BRG count source selection bit
f(XIN)
(f(XCIN) in low-speed mode)
1/4
Frequency division ratio 1/(n+1)
Baud rate generator 3
Address 002F16
ST/SP/PA generator
Transmit shift
completion flag (TSC)
1/16
P35/TXD3
Transmit shift register 3
Transmit interrupt source selection bit
Transmit interrupt request (TI)
Character length selection bit
Transmit buffer empty flag (TBE)
Transmit buffer register 3
Serial I/O3 status register
Address 003016
Address 003116
Data bus
Fig. 46 Block diagram of UART serial I/O3
Transmit or
receive clock
Transmit buffer
write signal
TBE=0
TSC=0
TBE=1
Serial output
TXD3
TBE=0
TBE=1
ST
D0
D1
SP
TSC=1*
ST
D0
D1
1 start bit
7 or 8 data bit
1 or 0 parity bit
1 or 2 stop bit (s)
SP
* Generated at 2nd bit in 2-stop-bit mode
Receive buffer
read signal
RBF=0
RBF=1
Serial input
RXD3
ST
D0
D1
SP
RBF=1
ST
D0
D1
SP
Notes 1: Error flag detection occurs at the same time that the RBF flag becomes “1” (at 1st stop bit, during reception).
2: As the transmit interrupt (TI), when either the TBE or TSC flag becomes “1”, can be selected to occur depending on the setting of the transmit interrupt source
selection bit (TIC) of the serial I/O3 control register.
3: The receive interrupt (RI) is set when the RBF flag becomes “1”.
4: After data is written to the transmit buffer when TSC=1, 0.5 to 1.5 cycles of the data shift cycle are necessary until changing to TSC=0.
Fig. 47 Operation of UART serial I/O3
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3804 Group (Spec.L)
[Transmit Buffer Register 3/Receive Buffer Register 3
(TB3/RB3)] 003016
The transmit buffer register 3 and the receive buffer register 3 are
located at the same address. The transmit buffer is write-only and
the receive buffer is read-only. If a character bit length is 7 bits,
the MSB of data stored in the receive buffer is “0”.
[Serial I/O3 Status Register (SIO3STS)] 003116
The read-only serial I/O3 status register consists of seven flags
(bits 0 to 6) which indicate the operating status of the serial I/O3
function and various errors.
Three of the flags (bits 4 to 6) are valid only in UART mode.
The receive buffer full flag (bit 1) is cleared to “0” when the
receive buffer register is read.
If there is an error, it is detected at the same time that data is
transferred from the receive shift register to the receive buffer
register, and the receive buffer full flag is set. A write to the
serial I/O3 status register clears all the error flags OE, PE, FE,
and SE (bit 3 to bit 6, respectively). Writing “0” to the serial I/O3
enable bit SIOE (bit 7 of the serial I/O3 control register) also
clears all the status flags, including the error flags.
Bits 0 to 6 of the serial I/O3 status register are initialized to “0” at
reset, but if the transmit enable bit (bit 4) of the serial I/O3
control register has been set to “1”, the transmit shift completion
flag (bit 2) and the transmit buffer empty flag (bit 0) become “1”.
[Serial I/O3 Control Register (SIO3CON)] 003216
The serial I/O3 control register consists of eight control bits for
the serial I/O3 function.
[UART3 Control Register (UART3CON)] 003316
The UART control register consists of four control bits (bits 0 to
3) which are valid when asynchronous serial I/O is selected and
set the data format of an data transfer, and one bit (bit 4) which is
always valid and sets the output structure of the P35/TXD3 pin.
[Baud Rate Generator 3 (BRG3)] 002F16
The baud rate generator determines the baud rate for serial
transfer.
The baud rate generator divides the frequency of the count source
by 1/(n + 1), where n is the value written to the baud rate
generator.
Rev.1.00 Oct 27, 2008
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Page 53 of 128
3804 Group (Spec.L)
b7
b0
Serial I/O3 status register
(SIO3STS : address 003116)
b7
Transmit buffer empty flag (TBE)
0: Buffer full
1: Buffer empty
Receive buffer full flag (RBF)
0: Buffer empty
1: Buffer full
Transmit shift completion flag (TSC)
0: Transmit shift in progress
1: Transmit shift completed
Overrun error flag (OE)
0: No error
1: Overrun error
Parity error flag (PE)
0: No error
1: Parity error
Framing error flag (FE)
0: No error
1: Framing error
Summing error flag (SE)
0: (OE) U (PE) U (FE)=0
1: (OE) U (PE) U (FE)=1
Not used (returns “1” when read)
b7
b0
UART3 control register
(UART3CON : address 003316)
Character length selection bit (CHAS)
0: 8 bits
1: 7 bits
Parity enable bit (PARE)
0: Parity checking disabled
1: Parity checking enabled
Parity selection bit (PARS)
0: Even parity
1: Odd parity
Stop bit length selection bit (STPS)
0: 1 stop bit
1: 2 stop bits
P35/TXD3 P-channel output disable bit (POFF)
0: CMOS output (in output mode)
1: N-channel open drain output (in output mode)
Not used (return “1” when read)
Fig. 48 Structure of serial I/O3 control registers
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REJ03B0266-0100
Page 54 of 128
b0
Serial I/O3 control register
(SIO3CON : address 003216)
BRG count source selection bit (CSS)
0: f(XIN) (f(XCIN) in low-speed mode)
1: f(XIN)/4 (f(XCIN)/4 in low-speed mode)
Serial I/O3 synchronous clock selection bit (SCS)
0: BRG output divided by 4 when clock synchronous
serial I/O3 is selected, BRG output divided by 16
when UART is selected.
1: External clock input when clock synchronous serial
I/O3 is selected, external clock input divided by 16
when UART is selected.
SRDY3 output enable bit (SRDY)
0: P37 pin operates as normal I/O pin
1: P37 pin operates as SRDY3 output pin
Transmit interrupt source selection bit (TIC)
0: Interrupt when transmit buffer has emptied
1: Interrupt when transmit shift operation is completed
Transmit enable bit (TE)
0: Transmit disabled
1: Transmit enabled
Receive enable bit (RE)
0: Receive disabled
1: Receive enabled
Serial I/O3 mode selection bit (SIOM)
0: Clock asynchronous (UART) serial I/O
1: Clock synchronous serial I/O
Serial I/O3 enable bit (SIOE)
0: Serial I/O3 disabled
(pins P34 to P37 operate as normal I/O pins)
1: Serial I/O3 enabled
(pins P34 to P37 operate as serial I/O3 pins)
3804 Group (Spec.L)
<Notes concerning serial I/O3>
1. Notes when selecting clock synchronous serial I/O
1.1 Stop of transmission operation
• Note
Clear the serial I/O3 enable bit and the transmit enable bit to
“0” (serial I/O and transmit disabled).
2. Notes when selecting clock asynchronous serial I/O
2.1 Stop of transmission operation
• Note
Clear the transmit enable bit to “0” (transmit disabled). The
transmission operation does not stop by clearing the serial
I/O3 enable bit to “0”.
• Reason
Since transmission is not stopped and the transmission circuit
is not initialized even if only the serial I/O3 enable bit is
cleared to “0” (serial I/O disabled), the internal transmission is
running (in this case, since pins T X D 3 , RX D 3 , S CLK3 , and
S RDY3 function as I/O ports, the transmission data is not
output). When data is written to the transmit buffer register in
this state, data starts to be shifted to the transmit shift register.
When the serial I/O3 enable bit is set to “1” at this time, the
data during internally shifting is output to the TXD3 pin and an
operation failure occurs.
• Reason
Since transmission is not stopped and the transmission circuit
is not initialized even if only the serial I/O3 enable bit is
cleared to “0” (serial I/O disabled), the internal transmission is
running (in this case, since pins T X D 3 , RX D 3 , S CLK3 , and
S RDY3 function as I/O ports, the transmission data is not
output). When data is written to the transmit buffer register in
this state, data starts to be shifted to the transmit shift register.
When the serial I/O3 enable bit is set to “1” at this time, the
data during internally shifting is output to the TXD3 pin and an
operation failure occurs.
1.2 Stop of receive operation
• Note
Clear the receive enable bit to “0” (receive disabled), or clear
the serial I/O3 enable bit to “0” (serial I/O disabled).
2.2 Stop of receive operation
• Note
Clear the receive enable bit to “0” (receive disabled).
1.3 Stop of transmit/receive operation
• Note
Clear both the transmit enable bit and receive enable bit to “0”
(transmit and receive disabled).
(when data is transmitted and received in the clock
synchronous serial I/O mode, any one of data transmission and
reception cannot be stopped.)
• Reason
In the clock synchronous serial I/O mode, the same clock is
used for transmission and reception. If any one of transmission
and reception is disabled, a bit error occurs because
transmission and reception cannot be synchronized.
In this mode, the clock circuit of the transmission circuit also
operates for data reception. Accordingly, the transmission
circuit does not stop by clearing only the transmit enable bit to
“0” (transmit disabled). Also, the transmission circuit is not
initialized by clearing the serial I/O3 enable bit to “0” (serial
I/O disabled) (refer to 1.1).
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 55 of 128
2.3 Stop of transmit/receive operation
• Note 1 (only transmission operation is stopped)
Clear the transmit enable bit to “0” (transmit disabled). The
transmission operation does not stop by clearing the serial
I/O3 enable bit to “0”.
• Reason
Since transmission is not stopped and the transmission circuit
is not initialized even if only the serial I/O3 enable bit is
cleared to “0” (serial I/O disabled), the internal transmission is
running (in this case, since pins T X D 3 , RX D 3 , S CLK3 , and
S RDY3 function as I/O ports, the transmission data is not
output). When data is written to the transmit buffer register in
this state, data starts to be shifted to the transmit shift register.
When the serial I/O3 enable bit is set to “1” at this time, the
data during internally shifting is output to the TXD3 pin and an
operation failure occurs.
• Note 2 (only receive operation is stopped)
Clear the receive enable bit to “0” (receive disabled).
3804 Group (Spec.L)
3. SRDY3 output of reception side
• Note
When signals are output from the SRDY3 pin on the reception
side by using an external clock in the clock synchronous serial
I/O mode, set all of the receive enable bit, the SRDY3 output
enable bit, and the transmit enable bit to “1” (transmit
enabled).
4. Setting serial I/O3 control register again
• Note
Set the serial I/O3 control register again after the transmission
and the reception circuits are reset by clearing both the
transmit enable bit and the receive enable bit to “0”.
Clear both the transmit enable
bit (TE) and the receive enable
bit (RE) to “0”
Set the bits 0 to 3 and bit 6 of
the serial I/O3 control register
Set both the transmit enable bit
(TE) and the receive enable bit
(RE), or one of them to “1”
Can be set with the
LDM instruction at
the same time
5.Data transmission control with referring to transmit shift
register completion flag
• Note
After the transmit data is written to the transmit buffer register,
the transmit shift register completion flag changes from “1” to
“0” with a delay of 0.5 to 1.5 shift clocks. When data
transmission is controlled with referring to the flag after
writing the data to the transmit buffer register, note the delay.
6. Transmission control when external clock is selected
• Note
When an external clock is used as the synchronous clock for
data transmission, set the transmit enable bit to “1” at “H” of
the SCLK3 input level. Also, write data to the transmit buffer
register at “H” of the SCLK input level.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 56 of 128
7. Transmit interrupt request when transmit enable bit is set
• Note
When using the transmit interrupt, take the following
sequence.
1. Set the serial I/O3 transmit interrupt enable bit to “0” (disabled).
2. Set the transmit enable bit to “1”.
3. Set the serial I/O3 transmit interrupt request bit to “0” after
1 or more instruction has executed.
4. Set the serial I/O3 transmit interrupt enable bit to “1”
(enabled).
• Reason
When the transmit enable bit is set to “1”, the transmit buffer
empty flag and the transmit shift register shift completion flag
are also set to “1”. Therefore, regardless of selecting which
timing for the generating of transmit interrupts, the interrupt
request is generated and the transmit interrupt request bit is set
at this point.
3804 Group (Spec.L)
PWM (PWM: Pulse Width Modulation)
The 3804 group (Spec.L) has PWM functions with an 8-bit
resolution, based on a signal that is the clock input XIN or that
clock input divided by 2 or the clock input XCIN or that clock
input divided by 2 in low-speed mode.
• Data Setting
The PWM output pin also functions as port P56. Set the PWM
period by the PWM prescaler, and set the “H” term of output
pulse by the PWM register.
If the value in the PWM prescaler is n and the value in the PWM
register is m (where n = 0 to 255 and m = 0 to 255):
PWM period = 255 × (n+1) / f(XIN)
= 31.875 × (n+1) μs
(when f(XIN) = 8 MHz, count source selection bit = “0”)
Output pulse “H” term = PWM period × m / 255
= 0.125 × (n+1) × m μs
(when f(XIN) = 8 MHz, count source selection bit = “0”)
• PWM Operation
When bit 0 (PWM enable bit) of the PWM control register is set
to “1”, operation starts by initializing the PWM output circuit,
and pulses are output starting at an “H”.
If the PWM register or PWM prescaler is updated during PWM
output, the pulses will change in the cycle after the one in which
the change was made.
31.875 × m × (n+1)
255
μs
PWM output
T = [31.875 × (n+1)] μs
m : Contents of PWM register
n : Contents of PWM prescaler
T : PWM period
(when f(XIN) = 8 MHz, count source selection bit = “0”)
Fig. 49 Timing of PWM period
Data bus
PWM
prescaler pre-latch
PWM
register pre-latch
Transfer control circuit
PWM
prescaler latch
PWM
register latch
PWM prescaler
PWM register
Count source
selection bit
XIN
(XCIN at lowspeed mode)
“0”
1/2
Port P56
“1”
Port P56 latch
PWM function enable bit
Fig. 50 Block diagram of PWM function
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REJ03B0266-0100
Page 57 of 128
3804 Group (Spec.L)
b7
b0
PWM control register
(PWMCON: address 002B16)
PWM function enable bit
0 : PWM disabled
1 : PWM enabled
Count source selection bit
0 : f(XIN) (f(XCIN) at low-speed mode)
1 : f(XIN)/2 (f(XCIN)/2 at low-speed mode)
Not used
(return “0” when read)
Fig. 51 Structure of PWM control register
A
B
C
B
C
T = T2
PWM output
T
PWM register
write signal
T
T2
(Changes “H” term from “A” to “ B”.)
PWM prescaler
write signal
(Changes PWM period from “T” to “T2”.)
When the contents of the PWM register or PWM prescaler have changed,
the PWM output will change from the next period after the change.
Fig. 52 PWM output timing when PWM register or PWM prescaler is changed
<Notes>
The PWM starts after the PWM function enable bit is set to enable and “L” level is output from the PWM pin.
The length of this “L” level output is as follows:
n+1 ---------------------sec
2 × f ( X IN )
n + 1--------------sec
f ( X IN )
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
(Count source selection bit = 0, where n is the value set in the prescaler)
(Count source selection bit = 1, where n is the value set in the prescaler)
Page 58 of 128
3804 Group (Spec.L)
A/D CONVERTER (successive approximation type)
[AD Conversion Register 1, 2 (AD1, AD2)] 0035 16 ,
003816
The AD conversion register is a read-only register that stores the
result of an A/D conversion. When reading this register during an
A/D conversion, the previous conversion result is read.
Bit 7 of the AD conversion register 2 is the conversion mode
selection bit. When this bit is set to “0”, the A/D converter
becomes the 10-bit A/D mode. When this bit is set to “1”, that
becomes the 8-bit A/D mode. The conversion result of the 8-bit
A/D mode is stored in the AD conversion register 1. As for 10-bit
A/D mode, not only 10-bit reading but also only high-order 8-bit
reading of conversion result can be performed by selecting the
reading procedure of the AD conversion registers 1, 2 after A/D
conversion is completed (in Figure 54).
As for 10-bit A/D mode, the 8-bit reading inclined to MSB is
performed when reading the AD converter register 1 after A/D
conversion is started; and when the AD converter register 1 is
read after reading the AD converter register 2, the 8-bit reading
inclined to LSB is performed.
• Channel Selector
The channel selector selects one of ports P67/AN7 to P60/AN0 or
P07/AN15 to P00/AN8, and inputs the voltage to the comparator.
• Comparator and Control Circuit
The comparator and control circuit compares an analog input
voltage with the comparison voltage, and then stores the result in
the AD conversion registers 1, 2. When an A/D conversion is
completed, the control circuit sets the AD conversion completion
bit and the AD interrupt request bit to “1”.
Note that because the comparator consists of a capacitor
coupling, set f(X IN ) to 500 kHz or more during an A/D
conversion.
b7
b0
AD/DA control register
(ADCON : address 003416)
Analog input pin selection bits 1
b2 b1 b0
0
0
0
0
1
1
1
1
[AD/DA Control Register (ADCON)] 003416
The AD/DA control register controls the A/D conversion
process. Bits 0 to 2 and bit 4 select a specific analog input pin.
Bit 3 signals the completion of an A/D conversion. The value of
this bit remains at “0” during an A/D conversion, and changes to
“1” when an A/D conversion ends. Writing “0” to this bit starts
the A/D conversion.
=0
(n = 0)
P60/AN0
P61/AN1
P62/AN2
P63/AN3
P64/AN4
P65/AN5
P66/AN6
P67/AN7
or
or
or
or
or
or
or
or
P00/AN8
P01/AN9
P02/AN10
P03/AN11
P04/AN12
P05/AN13
P06/AN14
P07/AN15
Analog input pin selection bit 2
0: AN0 to AN7 side
1: AN8 to AN15 side
Not used (returns “0” when read)
DA1 output enable bit
0: DA1 output disabled
1: DA1 output enabled
• 10-bit A/D mode (10-bit reading)
V REF
Vref = ------------- × n (n = 0 − 1023)
1024
• 8-bit A/D mode
V REF
Vref = ------------- × (n − 0.5) (n = 1 − 255)
256
0:
1:
0:
1:
0:
1:
0:
1:
AD conversion completion bit
0: Conversion in progress
1: Conversion completed
• Comparison Voltage Generator
The comparison voltage generator divides the voltage between
AV SS and V REF into 1024, and that outputs the comparison
voltage in the 10-bit A/D mode (256 division in 8-bit A/D mode).
The A/D converter successively compares the comparison
voltage Vref in each mode, dividing the V REF voltage (see
below), with the input voltage.
• 10-bit A/D mode (8-bit reading)
V REF
Vref = ------------- × n (n = 0 − 255)
256
0
0
1
1
0
0
1
1
DA2 output enable bit
0: DA2 output disabled
1: DA2 output enabled
Fig. 53 Structure of AD/DA control register
10-bit reading
(Read address 003816 before 003516)
AD conversion register 2
(AD2: address 003816)
b7
0
b0
b9 b8
AD conversion register 1
(AD1: address 003516)
b7
b0
b7 b6 b5 b4 b3 b2 b1 b0
Note : Bits 2 to 6 of address 003816 become “0” at reading.
8-bit reading
(Read only address 003516)
AD conversion register 1
(AD1: address 003516)
b7
b0
b9 b8 b7 b6 b5 b4 b3 b2
Fig. 54 Structure of 10-bit A/D mode reading
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 59 of 128
3804 Group (Spec.L)
Data bus
AD/DA control register b7
(Address 003416)
b0
4
A/D converter interrupt request
A/D control circuit
Comparator
Channel selector
P60/AN0
P61/AN1
P62/AN2
P63/AN3
P64/AN4
P65/AN5
P66/AN6
P67/AN7
P00/AN8
P01/AN9
P02/AN10
P03/AN11
P04/AN12
P05/AN13
P06/AN14
P07/AN15
10
Resistor ladder
VREF AVSS
Fig. 55 Block diagram of A/D converter
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
AD conversion register 2
AD conversion register 1
Page 60 of 128
(Address 003816)
(Address 003516)
3804 Group (Spec.L)
D/A CONVERTER
The 3804 group (Spec.L) has two internal D/A converters (DA1
and DA2) with 8-bit resolution.
The D/A conversion is performed by setting the value in each
DA conversion register. The result of D/A conversion is output
from the DA1 or DA2 pin by setting the DA output enable bit to
“1”.
When using the D/A converter, the corresponding port direction
register bit (P30 /DA 1 or P3 1 /DA 2 ) must be set to “0” (input
status).
The output analog voltage V is determined by the value n
(decimal notation) in the DA conversion register as follows:
DA1 conversion register (8)
DA1 output enable bit
Data bus
R-2R resistor ladder
V = VREF × n/256 (n = 0 to 255)
Where VREF is the reference voltage.
At reset, the DA conversion registers are cleared to “0016”, and
the DA output enable bits are cleared to “0”, and the P30/DA1
and P31/DA2 pins become high impedance.
The DA output does not have buffers. Accordingly, connect an
external buffer when driving a low-impedance load.
P30/DA1
DA2 conversion register (8)
DA2 output enable bit
R-2R resistor ladder
P31/DA2
Fig. 56 Block diagram of D/A converter
“0” DA1 output enable bit
R
R
R
R
R
R
R
2R
P30/DA1
“1”
2R
2R
2R
MSB
DA1 conversion register
“0”
2R
2R
2R
2R
LSB
“1”
AVSS
VREF
Fig. 57 Equivalent connection circuit of D/A converter (DA1)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
2R
Page 61 of 128
3804 Group (Spec.L)
WATCHDOG TIMER
The watchdog timer gives a mean of returning to the reset status
when a program cannot run on a normal loop (for example,
because of a software run-away). The watchdog timer consists of
an 8-bit watchdog timer L and an 8-bit watchdog timer H.
• Watchdog Timer Initial Value
Watchdog timer L is set to “FF16” and watchdog timer H is set to
“FF16” by writing to the watchdog timer control register (address
001E16) or at a reset. Any write instruction that causes a write
signal can be used, such as the STA, LDM, CLB, etc. Data can
only be written to bits 6 and 7 of the watchdog timer control
register. Regardless of the value written to bits 0 to 5, the abovementioned value will be set to each timer.
Bit 6 can be written only once after releasing reset. After
rewriting it is disable to write any data to this bit.
• Watchdog Timer Operations
The watchdog timer stops at reset and starts to count down by
writing to the watchdog timer control register (address 001E16).
An internal reset occurs at an underflow of the watchdog timer
H. The reset is released after waiting for a reset release time and
the program is processed from the reset vector address.
Accordingly, programming is usually performed so that writing
to the watchdog timer control register may be started before an
underflow. If writing to the watchdog timer control register is not
performed once, the watchdog timer does not function.
• Bit 6 of Watchdog Timer Control Register
• When bit 6 of the watchdog timer control register is “0”, the
MCU enters the stop mode by execution of STP instruction.
Just after releasing the stop mode, the watchdog timer restarts
counting (Note.) . When executing the WIT instruction, the
watchdog timer does not stop.
• When bit 6 is “1”, execution of STP instruction causes an
internal reset. When this bit is set to “1” once, it cannot be
rewritten to “0” by program. Bit 6 is “0” at reset.
The following shows the period between the write execution to
the watchdog timer control register and the underflow of
watchdog timer H.
Bit 7 of the watchdog timer control register is “0”:
when XCIN = 32.768 kHz; 32 s
when XIN = 16 MHz; 65.536 ms
Bit 7 of the watchdog timer control register is “1”:
when XCIN = 32.768 kHz; 125 ms
when XIN = 16 MHz; 256 μs
Note. The watchdog timer continues to count even during the wait time
set by timer 1 and timer 2 to release the stop state and in the wait
mode. Accordingly, write to the watchdog timer control register to
not underflow the watchdog timer in this time.
“FF16” is set when
watchdog timer
control register is
written to.
XCIN
“10”
Main clock division
ratio selection bits(1)
Data bus
Watchdog timer L (8)
1/16
XIN
“0”
“1”
“00”
“01”
“FF16” is set when
watchdog timer
control register is
written to.
Watchdog timer H (8)
Watchdog timer H count
source selection bit
STP instruction function selection bit
STP instruction
Reset
circuit
RESET
Internal reset
Note 1: Any one of high-speed, middle-speed or low-speed mode is selected by bits 7 and 6 of the CPU mode register.
Fig. 58 Block diagram of Watchdog timer
b7
b0
Watchdog timer control register
(WDTCON : address 001E16)
Watchdog timer H (for read-out of high-order 6 bit)
STP instruction function selection bit
0: Entering stop mode by execution of STP instruction
1: Internal reset by execution of STP instruction
Watchdog timer H count source selection bit
0: Watchdog timer L underflow
1: f(XIN)/16 or f(XCIN)/16
Fig. 59 Structure of Watchdog timer control register
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 62 of 128
3804 Group (Spec.L)
MULTI-MASTER I2C-BUS INTERFACE
The 3804 group (Spec. L) has the multi-master I 2 C-BUS
interface. The multi-master I 2 C-BUS interface is a serial
communications circuit, conforming to the Philips I2C-BUS data
transfer format. This interface, offering both arbitration lost
detection and a synchronous functions, is useful for the multimaster serial communications.
Figure 60 shows a block diagram of the multi-master I2C-BUS
interface and Table 9 lists the multi-master I2C-BUS interface
functions.
This multi-master I2C-BUS interface consists of the I2C slave
address registers 0 to 2, the I2C data shift register, the I2C clock
control register, the I2C control register, the I2C status register,
the I2C START/STOP condition control register, the I2C special
mode control register, the I2C special mode status register, and
other control circuits.
When using the multi-master I2C-BUS interface, set 1 MHz or
more to the internal clock φ.
Multi-master I2C-BUS interface functions
Table 9
Item
Function
Format
In conformity with Philips I2C-BUS
standard:
10-bit addressing format
7-bit addressing format
High-speed clock mode
Standard clock mode
Communication
mode
In conformity with Philips I2C-BUS
standard:
Master transmission
Master reception
Slave transmission
Slave reception
SCL clock
frequency
16.1 kHz to 400 kHz (at φ = 4 MHz)
System clock φ = f(XIN)/2 (high-speed mode)
φ = f(XIN)/8 (middle-speed mode)
NOTE:
1. We are not responsible for any third party’s infringement of
patent rights or other rights attributable to the use of the
control function (bit 6 of the I2C control register at address
002E16) for connections between the I2C-BUS interface and
ports (SCL1, SCL2, SDA1, and SDA2).
Interrupt
generating
circuit
Interrupt request signal
(SCL, SDA, IRQ)
b7
I2C slave address registers 0 to 2
b0
Interrupt
generating
circuit
SAD6 SAD5 SAD4 SAD3 SAD2 SAD1 SAD0 RBW
S0D0-2
Interrupt request signal
(I2CIRQ)
Address comparator
Noise
elimination
circuit
Serial data
(SDA)
Data
control
circuit
b0
b7
I2C data shift register
b7
S0
b0
AL AAS AD0 LRB
MST TRX BB PIN
SIS SIP SSC4 SSC3 SSC2 SSC1 SSC0
AL
circuit
I2C status register
S1
S2D I2C START/STOP condition control
register
Internal data bus
BB
circuit
Serial clock
(SCL)
Noise
elimination
circuit
Clock
control
circuit
b7
ACK
b0
ACK FAST CCR4 CCR3 CCR2 CCR1 CCR0
BIT MODE
b7
b0
SPCF
PIN2
AAS2 AAS1 AAS0
S2
I2C clock control register
Clock division
System clock
(φ)
S3 I 2C special mode status register
b7
b7
TISS
b0
TSEL
10BIT
SAD ALS
SPCFL PIN2
HD
b0
PIN2
IN
HSLAD ACKI
CON
ES0 BC2 BC1 BC0
S3D I 2C special mode control register
S1D I2C control register
Bit counter
Fig. 60 Block diagram of multi-master I2C-BUS interface
*: Purchase of Renesas Technology Corporation’s I2C components conveys a license under the Philips I2C Patent Rights
to use these components an I2C system, provided that the system conforms to the I2C Standard Specification as defined
by Philips.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 63 of 128
3804 Group (Spec.L)
[I2C Data Shift Register (S0)] 001116
The I2C data shift register (S0: address 001116) is an 8-bit shift
register to store receive data and write transmit data.
When transmit data is written into this register, it is transferred to
the outside from bit 7 in synchronization with the SCL, and each
time one-bit data is output, the data of this register are shifted by
one bit to the left. When data is received, it is input to this
register from bit 0 in synchronization with the SCL, and each
time one-bit data is input, the data of this register are shifted by
one bit to the left. The minimum 2 cycles of the internal clock φ
are required from the rising of the SCL until input to this register.
The I2C data shift register is in a write enable status only when
the I2C-BUS interface enable bit (ES0 bit) of the I2C control
register (S1D: address 001416) is “1”. The bit counter is reset by
a write instruction to the I2C data shift register. When both the
ES0 bit and the MST bit of the I2C status register (S1: address
001316) are “1”, the SCL is output by a write instruction to the
I 2 C data shift register. Reading data from the I2 C data shift
register is always enabled regardless of the ES0 bit value.
[I2C Slave Address Registers 0 to 2 (S0D0 to S0D2)]
0FF716 to 0FF916
The I2C slave address registers 0 to 2 (S0D0 to S0D2: addresses
0FF716 to 0FF916) consists of a 7-bit slave address and a read/
write bit. In the addressing mode, the slave address written in this
register is compared with the address data to be received
immediately after the START condition is detected.
• Bit 0: Read/write bit (RWB)
This is not used in the 7-bit addressing mode. In the 10-bit
addressing mode, set RWB to “0” because the first address data
to be received is compared with the contents (SAD6 to SAD0 +
RWB) of the I2C slave address registers 0 to 2.
When 2-byte address data match slave address, a 7-bit slave
address which is received after restart condition has detected and
R/W data can be matched by setting “1” to RWB with software.
The RWB is cleared to “0” automatically when the stop
condition is detected.
• Bits 1 to 7: Slave address (SAD0-SAD6)
These bits store slave addresses. Regardless of the 7-bit
addressing mode or the 10-bit addressing mode, the address data
transmitted from the master is compared with these bits’
contents.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 64 of 128
b7
b0
SAD6 SAD5 SAD4 SAD3 SAD2 SAD1 SAD0 RWB
I2C slave address register 0
(S0D0: address 0FF716)
I2C slave address register 1
(S0D1: address 0FF816)
I2C slave address register 2
(S0D2: address 0FF916)
Read/write bit
Slave address
Fig. 61 Structure of I2C slave address registers 0 to 2
3804 Group (Spec.L)
[I2C Clock Control Register (S2)] 001516
The I2C clock control register (S2: address 001516) is used to set
ACK control, SCL mode and SCL frequency.
b7
ACK
b0
ACK
BIT
FAST CCR4 CCR3 CCR2 CCR1 CCR0
MODE
• Bits 0 to 4: SCL frequency control bits (CCR0-CCR4)
These bits control the SCL frequency. Refer to Table 10.
SCL frequency control bits
Refer to Table 10.
• Bit 5: SCL mode specification bit (FAST MODE)
This bit specifies the SCL mode. When this bit is set to “0”, the
standard clock mode is selected. When the bit is set to “1”, the
high-speed clock mode is selected.
When connecting the bus of the high-speed mode I 2 C bus
standard (maximum 400 kbits/s), use 8 MHz or more oscillation
frequency f(XIN) in the high-speed mode (2 division clock).
• Bit 6: ACK bit (ACK BIT)
This bit sets the SDA status when an ACK clock* is generated.
When this bit is set to “0”, the ACK return mode is selected and
SDA goes to “L” at the occurrence of an ACK clock. When the
bit is set to “1”, the ACK non-return mode is selected. The SDA
is held in the “H” status at the occurrence of an ACK clock.
However, when the slave address agree with the address data in
the reception of address data at ACK BIT = “0”, the SDA is
automatically made “L” (ACK is returned). If there is a
disagreement between the slave address and the address data, the
SDA is automatically made “H” (ACK is not returned).
* ACK clock: Clock for acknowledgment
• Bit 7: ACK clock bit (ACK)
This bit specifies the mode of acknowledgment which is an
acknowledgment response of data transfer. When this bit is set to
“0”, the no ACK clock mode is selected. In this case, no ACK
clock occurs after data transmission. When the bit is set to “1”,
the ACK clock mode is selected and the master generates an
ACK clock each completion of each 1-byte data transfer. The
device for transmitting address data and control data releases the
SDA at the occurrence of an ACK clock (makes SDA “H”) and
receives the ACK bit generated by the data receiving device.
Note. Do not write data into the I2C clock control register during transfer. If data is written during transfer, the I2C clock generator is
reset, so that data cannot be transferred normally.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 65 of 128
I2C clock control register
(S2: address 001516)
SCL mode specification bit
0: Standard clock mode
1: High-speed clock mode
ACK bit
0: ACK is returned
1: ACK is not returned
ACK clock bit
0: No ACK clock
1: ACK clock
Fig. 62 Structure of I2C clock control register
Table 10 Set values of I2C clock control register and
SCL frequency
Setting value of
CCR4-CCR0
SCL frequency
(at φ = 4 MKz, unit: kHz) (Note 1)
Standard clock
High-speed
CCR4 CCR3 CCR2 CCR1 CCR0
mode
clock mode
0
0
0
0
0 Setting disabled Setting disabled
0
0
0
0
1 Setting disabled Setting disabled
0
0
0
1
0 Setting disabled Setting disabled
0
0
0
1
1
0
0
1
0
0
0
0
:
:
1
1
1
0
0
:
:
1
1
1
1
1
:
:
1
1
1
0
1
:
:
0
1
1
1
0
:
:
1
0
1
− (Note 2)
− (Note 2)
333
250
100
400 (Note 3)
83.3
166
500/CCR value 1000/CCR value
(Note 3)
(Note 3)
17.2
34.5
16.6
33.3
16.1
32.3
NOTES:
1. Duty of SCL output is 50 %. The duty becomes 35 to 45 %
only when the high-speed clock mode is selected and CCR
value = 5 (400 kHz, at φ = 4 MHz). “H” duration of the clock
fluctuates from -4 to +2 machine cycles in the standard clock
mode, and fluctuates from -2 to +2 machine cycles in the
high-speed clock mode. In the case of negative fluctuation,
the frequency does not increase because “L” duration is
extended instead of “H” duration reduction. These are values
when SCL synchronization by the synchronous function is
not performed. CCR value is the decimal notation value of
the SCL frequency control bits CCR4 to CCR0.
2. Each value of SCL frequency exceeds the limit at φ = 4 MHz
or more. When using these setting value, use φ of 4 MHz or
less.
3. The data formula of SCL frequency is described below:
φ/(8 × CCR value) Standard clock mode
φ/(4 × CCR value) High-speed clock mode (CCR value ≠ 5)
φ/(2 × CCR value) High-speed clock mode (CCR value = 5)
Do not set 0 to 2 as CCR value regardless of φ frequency.
Set 100 kHz (max.) in the standard clock mode and 400 kHz
(max.) in the high-speed clock mode to the SCL frequency
by setting the SCL frequency control bits CCR4 to CCR0.
3804 Group (Spec.L)
[I2C Control Register (S1D)] 001416
The I2C control register (S1D: address 001416) controls data
communication format.
b7
TISS
• Bits 0 to 2: Bit counter (BC0-BC2)
These bits decide the number of bits for the next 1-byte data to be
transmitted. The I2C interrupt request signal occurs immediately
after the number of count specified with these bits (ACK clock is
added to the number of count when ACK clock is selected by
ACK clock bit (bit 7 of S2, address 0015 1 6 ) have been
transferred, and BC0 to BC2 are returned to “0002”.
Also when a START condition is received, these bits become
“0002” and the address data is always transmitted and received in
8 bits.
• Bit 3: I2C interface enable bit (ES0)
This bit enables to use the multi-master I2 C-BUS interface.
When this bit is set to “0”, the use disable status is provided, so
that the SDA and the SCL become high-impedance. When the bit
is set to “1”, use of the interface is enabled.
When ES0 = “0”, the following is performed.
• PIN = “1”, BB = “0” and AL = “0” are set (which are bits of
the I2C status register, S1, at address 001316 ).
• Writing data to the I2C data shift register (S0: address 001116)
is disabled.
• Bit 4: Data format selection bit (ALS)
This bit decides whether or not to recognize slave addresses.
When this bit is set to “0”, the addressing format is selected, so
that address data is recognized. When a match is found between a
slave address and address data as a result of comparison or when
a general call (refer to “I2C Status Register”, bit 1) is received,
transfer processing can be performed. When this bit is set to “1”,
the free data format is selected, so that slave addresses are not
recognized.
• Bit 5: Addressing format selection bit (10BIT SAD)
This bit selects a slave address specification format. When this
bit is set to “0”, the 7-bit addressing format is selected. In this
case, only the high-order 7 bits (slave address) of the I2C slave
address registers 0 to 2 are compared with address data. When
this bit is set to “1”, the 10-bit addressing format is selected, and
all the bits of the I2C slave address registers 0 to 2 are compared
with address data.
• Bit 7: I2C-BUS interface pin input level selection bit
(TISS)
This bit selects the input level of the SCL and SDA pins of the
multi-master I2C-BUS interface.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 66 of 128
b0
10BIT
ALS ES0 BC2 BC1 BC0
SAD
I2C control register
(S1D: address 001416)
Bit counter (Number of
transmit/receive bits)
b2 b1 b0
0 0 0 : 8
0 0 1 : 7
0 1 0 : 6
0 1 1 : 5
1 0 0 : 4
1 0 1 : 3
1 1 0 : 2
1 1 1 : 1
I2C-BUS interface enable
bit
0: Disabled
1: Enabled
Data format selection bit
0: Addressing format
1: Free data format
Addressing format
selection bit
0: 7-bit addressing
format
1: 10-bit addressing
format
Not used
(return “0” when read)
I2C-BUS interface pin input
level selection bit
0: SMBUS input
1: CMOS input
Fig. 63 Structure of I2C clock control register
3804 Group (Spec.L)
[I2C Status Register (S1)] 001316
The I2C status register (S1: address 001316) controls the I2CBUS interface status. The low-order 4 bits are read-only bits and
the high-order 4 bits can be read out and written to.
Set “00002” to the low-order 4 bits, because these bits become
the reserved bits at writing.
• Bit 0: Last receive bit (LRB)
This bit stores the last bit value of received data and can also be
used for ACK receive confirmation. If ACK is returned when an
ACK clock occurs, the LRB bit is set to “0”. If ACK is not
returned, this bit is set to “1”. Except in the ACK mode, the last
bit value of received data is input. The state of this bit is changed
from “1” to “0” by executing a write instruction to the I2C data
shift register (S0: address 001116).
• Bit 1: General call detecting flag (AD0)
When the ALS bit is “0”, this bit is set to “1” when a general
call* whose address data is all “0” is received in the slave mode.
By a general call of the master device, every slave device
receives control data after the general call. The AD0 bit is set to
“0” by detecting the STOP condition or START condition, or
reset.
* General call: The master transmits the general call address
“0016” to all slaves.
• Bit 2: Slave address comparison flag (AAS)
This flag indicates a comparison result of address data when the
ALS bit is “0”.
(1) In the slave receive mode, when the 7-bit addressing format
is selected, this bit is set to “1” in one of the following
conditions:
• The address data immediately after occurrence of a
START condition agrees with the slave address stored in
the high-order 7 bits of the I2C slave address register.
• A general call is received.
(2) In the slave receive mode, when the 10-bit addressing
format is selected, this bit is set to “1” with the following
condition:
• When the address data is compared with the I2C slave
address register (8 bits consisting of slave address and
RWB bit), the first bytes agree.
(3) This bit is set to”0” by executing a write instruction to the
I2C data shift register (S0: address 001116) when ES0 is set
to “1” or reset.
• Bit 3: Arbitration lost* detecting flag (AL)
In the master transmission mode, when the SDA is made “L” by
any other device, arbitration is judged to have been lost, so that
this bit is set to “1”. At the same time, the TRX bit is set to “0”,
so that immediately after transmission of the byte whose
arbitration was lost is completed, the MST bit is set to “0”. The
arbitration lost can be detected only in the master transmission
mode. When arbitration is lost during slave address transmission,
the TRX bit is set to “0” and the reception mode is set.
Consequently, it becomes possible to detect the agreement of its
own slave address and address data transmitted by another
master device.
The AL bit is set to “0” in one of the following conditions:
• Executing a write instruction to the I2C data shift register (S0:
address 001116)
• When the ES0 bit is “0”
• At reset
* Arbitration lost: The status in which communication as a
master is disabled.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
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• Bit 4: SCL pin low hold bit (PIN)
This bit generates an interrupt request signal. Each time 1-byte
data is transmitted, the PIN bit changes from “1” to “0”. At the
same time, an interrupt request signal occurs to the CPU. The
PIN bit is set to “0” in synchronization with a falling of the last
clock (including the ACK clock) of an internal clock and an
interrupt request signal occurs in synchronization with a falling
of the PIN bit. When the PIN bit is “0”, the SCL is kept in the “0”
state and clock generation is disabled. Figure 65 shows an
interrupt request signal generating timing chart.
The PIN bit is set to “1” in one of the following conditions:
• Executing a write instruction to the I2C data shift register (S0:
address 0011 16 ). (This is the only condition which the
prohibition of the internal clock is released and data can be
communicated except for the start condition detection.)
• When the ES0 bit is “0”
• At reset
• When writing “1” to the PIN bit by software
The PIN bit is set to “0” in one of the following conditions:
• Immediately after completion of 1-byte data transmission
(including when arbitration lost is detected)
• Immediately after completion of 1-byte data reception
• In the slave reception mode, with ALS = “0” and immediately
after completion of slave address agreement or general call
address reception
• In the slave reception mode, with ALS = “1” and immediately
after completion of address data reception
• Bit 5: Bus busy flag (BB)
This bit indicates the status of use of the bus system. When this
bit is set to “0”, this bus system is not busy and a START
condition can be generated. The BB flag is set/reset by the SCL,
SDA pins input signal regardless of master/slave. This flag is set
to “1” by detecting the START condition, and is set to “0” by
detecting the STOP condition. The condition of these detecting is
set by the START/STOP condition setting bits (SSC4-SSC0) of
the I2C START/STOP condition control register (S2D: address
001616). When the ES0 bit of the I2C control register (bit 3 of
S1D, address 001416) is “0” or reset, the BB flag is set to “0”.
For the writing function to the BB flag, refer to the sections
“START Condition Generating Method” and “STOP Condition
Generating Method” described later.
3804 Group (Spec.L)
• Bit 6: Communication mode specification bit (transfer
direction specification bit: TRX)
This bit decides a direction of transfer for data communication.
When this bit is “0”, the reception mode is selected and the data
of a transmitting device is received. When the bit is “1”, the
transmission mode is selected and address data and control data
are output onto the SDA in synchronization with the clock
generated on the SCL.
This bit is set/reset by software and hardware. About set/reset by
hardware is described below. This bit is set to “1” by hardware
when all the following conditions are satisfied:
• When ALS is “0”
• In the slave reception mode or the slave transmission mode
• When the R/W bit reception is “1”
• This bit is set to “0” in one of the following conditions:
• When arbitration lost is detected.
• When a STOP condition is detected.
• When writing “1” to this bit by software is invalid by the
START condition duplication preventing function (Note).
• With MST = “0” and when a START condition is detected.
• With MST = “0” and when ACK non-return is detected.
• At reset
• Bit 7: Communication mode specification bit (master/
slave specification bit: MST)
This bit is used for master/slave specification for data
communication. When this bit is “0”, the slave is specified, so
that a START condition and a STOP condition generated by the
master are received, and data communication is performed in
synchronization with the clock generated by the master. When
this bit is “1”, the master is specified and a START condition and
a STOP condition are generated. Additionally, the clocks
required for data communication are generated on the SCL.
This bit is set to “0” in one of the following conditions.
• Immediately after completion of the byte which has lost
arbitration when arbitration lost is detected
• When a STOP condition is detected.
• Writing “1” to this bit by software is invalid by the START
condition duplication preventing function (Note).
• At reset
b7
b0
MST TRX BB PIN AL AAS AD0 LRB
I2C status register
(S1: address 001316)
Last receive bit (Note)
0: Last bit = “0”
1: Last bit = “1”
General call detecting flag
(Note)
0: No general call detected
1: General call detected
Slave address comparison flag
(Note)
0: Address disagreement
1: Address agreement
Arbitration lost detecting flag
(Note)
0: Not detected
1: Detected
SCL pin low hold bit
0: SCL pin low hold
1: SCL pin low release
Bus busy flag
0: Bus free
1: Bus busy
Communication mode
specification bits
0 0 : Slave receive mode
0 1 : Slave transmit mode
1 0 : Master receive mode
1 1 : Master transmit mode
Note: These bits and flags can be read out, but cannot be written.
Write “0” to these bits at writing.
Fig. 64 Structure of I2C status register
SCL
PIN
Note. START condition duplication preventing function
The MST, TRX, and BB bits is set to “1” at the same time after
confirming that the BB flag is “0” in the procedure of a START
condition occurrence. However, when a START condition by
another master device occurs and the BB flag is set to “1” immediately after the contents of the BB flag is confirmed, the START
condition duplication preventing function makes the writing to the
MST and TRX bits invalid. The duplication preventing function
becomes valid from the rising of the BB flag to reception completion of slave address.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 68 of 128
I2CIRQ
Fig. 65 Interrupt request signal generating timing
3804 Group (Spec.L)
START Condition Generating Method
STOP Condition Generating Method
I2C
When writing “1” to the MST, TRX, and BB bits of the
status register (S1: address 001316) at the same time after writing
the slave address to the I 2 C data shift register (S0: address
001116 ) with the condition in which the ES0 bit of the I 2 C
control register (S1D: address 001416) is “1” and the BB flag is
“0”, a START condition occurs. After that, the bit counter
becomes “0002” and an SCL for 1 byte is output. The START
condition generating timing is different in the standard clock
mode and the high-speed clock mode. Refer to Figure 66, the
START condition generating timing diagram, and Table 11, the
START condition generating timing table.
When the ES0 bit of the I2 C control register (S1D: address
001416) is “1”, write “1” to the MST and TRX bits, and write “0”
to the BB bit of the I2 C status register (S1: address 0013 16 )
simultaneously. Then a STOP condition occurs. The STOP
condition generating timing is different in the standard clock
mode and the high-speed clock mode. Refer to Figure 67, the
STOP condition generating timing diagram, and Table 12, the
STOP condition generating timing table.
I2C status register
write signal
SCL
I2C status register
write signal
SCL
Setup
time
Hold time
SDA
Setup
time
Hold time
Fig. 67 STOP condition generating timing diagram
SDA
Table 12 STOP condition generating timing table
Fig. 66 START condition generating timing diagram
Table 11 START condition generating timing table
Item
Setup time
Hold time
Standard clock
mode
5.0 μs (20 cycles)
5.0 μs (20 cycles)
High-speed clock
mode
2.5 μs (10 cycles)
2.5 μs (10 cycles)
NOTE:
1. Absolute time at φ = 4 MHz. The value in parentheses
denotes the number of φ cycles.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 69 of 128
Item
Setup time
Hold time
NOTE:
Standard clock
mode
5.0 μs (20 cycles)
4.5 μs (18 cycles)
High-speed clock
mode
3.0 μs (12 cycles)
2.5 μs (10 cycles)
1. Absolute time at φ = 4 MHz. The value in parentheses
denotes the number of φ cycles.
3804 Group (Spec.L)
START/STOP Condition Detecting Operation
The START/STOP condition detection operations are shown in
Figures 68, 69, and Table 13. The START/STOP condition is set
by the START/STOP condition set bit.
The START/STOP condition can be detected only when the
input signal of the SCL and SDA pins satisfy three conditions:
SCL release time, setup time, and hold time (see Table 13).
The BB flag is set to “1” by detecting the START condition and
is reset to “0” by detecting the STOP condition.
The BB flag set/reset timing is different in the standard clock
mode and the high-speed clock mode. Refer to Table 13, the BB
flag set/reset time.
SCL release time
SCL
SDA
Setup
time
Hold time
BB flag
reset time
BB flag
Fig. 68 START/STOP condition detecting timing
diagram
Note. When a STOP condition is detected in the slave mode (MST = 0),
an interrupt request signal “I2CIRQ” occurs to the CPU.
SCL release time
Table 13 START condition/STOP condition detecting
conditions
Standard clock mode
High-speed clock mode
SCL release
time
SSC value + 1 cycle (6.25 μs)
4 cycle (1.0 μs)
Setup time
SSC value + 1
cycle < 4 μs (3.125 μs)
2
2 cycle (0.5 μs)
Hold time
SSC value + 1
cycle < 4 μs (3.125 μs)
2
2 cycle (0.5 μs)
BB flag set/
reset time
SSC value −1
+ 2 cycles (3.375 μs)
2
3.5 cycle (0.875 μs)
Setup
time
Hold time
SDA
BB flag
reset time
BB flag
NOTE:
1. Unit : Cycle number of system clock φ
SSC value is the decimal notation value of the START/STOP
condition set bits SSC4 to SSC0. Do not set “0” or an odd
number to SSC value. The value in parentheses is an
example when the I2C START/STOP condition control
register is set to “1816” at φ = 4 MHz.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
SCL
Page 70 of 128
Fig. 69 STOP condition detecting timing diagram
3804 Group (Spec.L)
[I2C START/STOP Condition Control Register (S2D)]
001616
The I2C START/STOP condition control register (S2D: address
001616) controls START/STOP condition detection.
• Bits 0 to 4: START/STOP condition set bits
(SSC4-SSC0)
SCL release time, setup time, and hold time change the detection
condition by value of the main clock divide ratio selection bit
and the oscillation frequency f(XIN ) because these time are
measured by the internal system clock. Accordingly, set the
proper value to the START/STOP condition set bits (SSC4 to
SSC0) in considered of the system clock frequency. Refer to
Table 13.
Do not set “00000 2 ” or an odd number to the START/STOP
condition set bits (SSC4 to SSC0).
Refer to Table 14, the recommended set value to START/STOP
condition set bits (SSC4-SSC0) for each oscillation frequency.
• Bit 6: SCL/SDA interrupt pin selection bit (SIS)
This bit selects the pin of which interrupt becomes valid between
the SCL pin and the SDA pin.
Note. When changing the setting of the SCL/SDA interrupt pin polarity
selection bit, the SCL/SDA interrupt pin selection bit, or the I2CBUS interface enable bit ES0, the SCL/SDA interrupt request bit
may be set. When selecting the SCL/SDA interrupt source, disable the interrupt before the SCL/SDA interrupt pin polarity selection bit, the SCL/SDA interrupt pin selection bit, or the I2C-BUS
interface enable bit ES0 is set. Reset the request bit to “0” after
setting these bits, and enable the interrupt.
• Bit 5: SCL/SDA interrupt pin polarity selection bit
(SIP)
An interrupt can occur when detecting the falling or rising edge
of the SCL or SDA pin. This bit selects the polarity of the SCL or
SDA pin interrupt pin.
b7
b0
SIS
SIP SSC4 SSC3 SSC2 SSC1 SSC0
I2C START/STOP condition
control register
(S2D: address 001616)
START/STOP condition set bits
SCL/SDA interrupt pin polarity
selection bit
0: Falling edge active
1: Rising edge active
SCL/SDA interrupt pin selection bit
0: SDA valid
1: SCL valid
Not used
(Fix this bit to “0”.)
Fig. 70 Structure of I2C START/STOP condition control
register
Table 14 Recommended set value to START/STOP condition set bits (SSC4-SSC0) for each oscillation frequency
Oscillation
frequency
f(XIN)(MHz)
Main clock
divide ratio
Internal clock φ
(MHz)
8
2
4
8
8
1
4
2
2
2
2
1
START/STOP
condition control
register
SCL release time
(μs)
XXX11010
XXX11000
Setup time
(μs)
Hold time
(μs)
6.75 μs (27 cycles)
3.5 μs (14 cycles)
3.25 μs (13 cycles)
6.25 μs (25 cycles)
3.25 μs (13 cycles)
3.0 μs (12 cycles)
XXX00100
5.0 μs (5 cycles)
3.0 μs (3 cycles)
2.0 μs (2 cycles)
XXX01100
6.5 μs (13 cycles)
3.5 μs (7 cycles)
3.0 μs (6 cycles)
XXX01010
5.5 μs (11 cycles)
3.0 μs (6 cycles)
2.5 μs (5 cycles)
XXX00100
5.0 μs (5 cycles)
3.0 μs (3 cycles)
2.0 μs (2 cycles)
NOTE:
1. Do not set an odd number to the START/STOP condition set bits (SSC4 to SSC0) and “000002”.
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3804 Group (Spec.L)
[I2C Special Mode Status Register (S3)] 001216
The I 2 C special mode status register (S3: address 0012 16 )
consists of the flags indicating I 2C operating state in the I2C
special mode, which is set by the I2 C special mode control
register (S3D: address 001716).
The stop condition flag is valid in all operating modes.
• Bit 0: Slave address 0 comparison flag (AAS0)
Bit 1: Slave address 1 comparison flag (AAS1)
Bit 2: Slave address 2 comparison flag (AAS2)
These flags indicate a comparison result of address data. These
flags are valid only when the slave address control bit (MSLAD)
is “1”.
In the 7-bit addressing format of the slave reception mode, the
respective slave address i (i = 0, 1, 2) comparison flags
corresponding to the I2C slave address registers 0 to 2 are set to
“1” when an address data immediately after an occurrence of a
START condition agrees with the high-order 7-bit slave address
stored in the I2C slave address registers 0 to 2 (addresses 0FF716
to 0FF916).
In the 10-bit addressing format of the slave mode, the respective
slave address i (i = 0, 1, 2) comparison flags corresponding to the
I2C slave address registers are set to “1” when an address data is
compared with the 8 bits consisting of the slave address stored in
the I2C slave address registers 0 to 2 and the RWB bit, and the
first byte agrees.
These flags are initialized to “0” at reset, when the slave address
control bit (MSLAD) is “0”, or when writing data to the I2C data
shift register (S0: address 001116).
b7
SPCF
• Bit 5: SCL pin low hold 2 flag (PIN2)
When the ACK interrupt control bit (ACKICON) and the ACK
clock bit (ACK) are “1”, this flag is set to “0” in synchronization
with the falling of the data’s last SCL clock, just before the ACK
clock. The SCL pin is simultaneously held low, and the I2 C
interrupt request occurs.
This flag is initialized to “1” at reset, when the ACK interrupt
control bit (ACKICON) is “0”, or when writing “1” to the SCL
pin low hold 2 flag set bit (PIN2IN).
The SCL pin is held low when either the SCL pin low hold bit
(PIN) or the SCL pin low hold 2 flag (PIN2) becomes “0”. The
low hold state of the SCL pin is released when both the SCL pin
low hold bit (PIN) and the SCL pin low hold 2 flag (PIN2) are
“1”.
• Bit 7: Stop condition flag (SPCF)
This flag is set to “1” when a STOP condition occurs.
This flag is initialized to “0” at reset, when the I 2 C-BUS
interface enable bit (ES0) is “0”, or when writing “1” to the
STOP condition flag clear bit (SPFCL).
b0
PIN2
AAS2 AAS1
AAS0
I2C special mode status register
(S3: address 001216)
Slave address 0 comparison flag
0: Address disagreement
1: Address agreement
Slave address 1 comparison flag
0: Address disagreement
1: Address agreement
Slave address 2 comparison flag
0: Address disagreement
1: Address agreement
Not used
(return “0” when read)
Not used
(undefined when read)
SCL pin low hold 2 flag
0: SCL pin low hold
1: SCL pin low release (Note)
Not used
(return “0” when read)
STOP condition flag
0: No detection
1: Detection
Note: In order that the low hold state of the SCL pin may release, it is necessary that the
SCL pin low hold 2 flag and the SCL pin low hold bit (PIN) are “1” simultaneously.
Fig. 71 Structure of I2C special mode status register
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3804 Group (Spec.L)
[I2C Special Mode Control Register (S3D)] 001716
The I2C special mode control register (S3D: address 001716 )
controls special functions such as occurrence timing of reception
interrupt request and extending slave address comparison to 3
bytes.
• Bit 1: ACK interrupt control bit (ACKICON)
This bit controls the timing of I2C interrupt request occurrence at
completion of data receiving due to master reception or slave
reception.
When this bit is “0”, the SCL pin low hold bit (PIN) is set to “0”
in synchronization with the falling of the last SCL clock,
including the ACK clock. The SCL pin is simultaneously held
low, and the I2C interrupt request occurs.
When this bit is “1” and the ACK clock bit (ACK) is “1”, the
SCL pin low hold 2 flag (PIN2) is set to “0” in synchronization
with the falling of the data’s last SCL clock, just before the ACK
clock. The SCL pin is simultaneously held low, and the I2 C
interrupt request occurs again. The ACK bit can be changed after
the contents of data are confirmed by using this function.
• Bit 2: I2C slave address control bit (MSLAD)
This bit controls a slave address. When this bit is “0”, only the
I2C slave address register 0 (address 0FF716) becomes valid as a
slave address and a read/write bit.
When this bit is “1”, all of the I2C slave address registers 0 to 2
(addresses 0FF716 to 0FF916) become valid as a slave address
and a read/write bit. In this case, when an address data agrees
with any one of the I2C slave address registers 0 to 2, the slave
address comparison flag (AAS) is set to “1” and the I2C slave
address comparison flag corresponding to the agreed I2C slave
address registers 0 to 2 is also set to “1”.
• Bit 5: SCL pin low hold 2 flag set bit (PIN2IN)
Writing “1” to this bit initializes the SCL pin low hold 2 flag
(PIN2) to “1”.
When writing “0”, nothing is generated.
• Bit 6: SCL pin low hold set bit (PIN2HD)
When the SCL pin low hold bit (PIN) becomes “0”, the SCL pin
is held low. However, the SCL pin low hold bit (PIN) cannot be
set to “0” by software. The SCL pin low hold set bit (PIN2HD)
is used to, hold the SCL pin in the low state by software. When
writing “1” to this bit, the SCL pin low hold 2 flag (PIN2)
becomes “0”, and the SCL pin is held low. When writing “0”,
nothing occurs.
• Bit 7: STOP condition flag clear bit (SPFCL)
Writing “1” to this bit initializes the STOP condition flag (SPCF)
to “0”.
When writing “0”, nothing is generated.
b7
b0
SPFCL PIN2HD PIN2IN
ACKI
MSLAD
CON
I2C special mode control register
(S3D: address 001716)
Not used
(Fix this bit to “0”.)
ACK interrupt control bit
0: At communication completion
1: At falling of ACK clock and communication
completion
Slave address control bit
0: One-byte slave address compare mode
1: Three-byte slave address compare mode
Not used
(return “0” when read)
Not used
(Fix this bit to “0”.)
SCL pin low hold 2 flag set bit (Notes 1, 2)
Writing “1” to this bit initializes the SCL pin
low hold 2 flag to “1”.
SCL pin low hold set bit (Notes 1, 2)
When writing “1” to this bit, the SCL pin low
hold 2 flag becomes “0” and the SCL pin is
held low.
STOP condition flag clear bit (Note 2)
Writing “1” to this bit initializes the STOP
condition flag to “0”.
Notes 1: Do not write “1” to these bits simultaneously.
2: return “0” when read
Fig. 72 Structure of I2C special mode control register
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3804 Group (Spec.L)
Address Data Communication
There are two address data communication formats, namely, 7bit addressing format and 10-bit addressing format. The
respective address communication formats are described below.
• 7-bit addressing format
To adapt the 7-bit addressing format, set the 10BIT SAD bit of
the I2C control register (S1D: address 001416) to “0”. The first 7bit address data transmitted from the master is compared with the
high-order 7-bit slave address stored in the I2C slave address
register. At the time of this comparison, address comparison of
the RWB bit of the I2C slave address register is not performed.
For the data transmission format when the 7-bit addressing
format is selected, refer to Figure 73, (1) and (2).
• 10-bit addressing format
To adapt the 10-bit addressing format, set the 10BIT SAD bit of
the I2C control register (S1D: address 001416) to “1”. An address
comparison is performed between the first-byte address data
transmitted from the master and the 8-bit slave address stored in
the I2C slave address register. At the time of this comparison, an
address comparison between the RWB bit of the I 2 C slave
address register and the R/W bit which is the last bit of the
address data transmitted from the master is made. In the 10-bit
addressing mode, the RWB bit which is the last bit of the address
data not only specifies the direction of communication for
control data, but also is processed as an address data bit.
When the first-byte address data agree with the slave address, the
AAS bit of the I2C status register (S1: address 001316) is set to
“1”. After the second-byte address data is stored into the I2C data
shift register (S0: address 0011 1 6 ), perform an address
comparison between the second-byte data and the slave address
by software. When the address data of the 2 bytes agree with the
slave address, set the RWB bit of the I2C slave address register to
“1” by software. This processing can make the 7-bit slave
address and R/W data agree, which are received after a
RESTART condition is detected, with the value of the I2C slave
address register. For the data transmission format when the 10bit addressing format is selected, refer to Figure 73, (3) and (4)
.
(1) A master-transmitter transmits data to a slave-receiver
S
Slave address R/W
7 bits
A
“0”
Data
A
1 to 8 bits
Data
A/A
P
A
P
1 to 8 bits
(2) A master-receiver receives data from a slave-transmitter
S
Slave address R/W
7 bits
“1”
A
Data
A
1 to 8 bits
Data
1 to 8 bits
(3) A master-transmitter transmits data to a slave-receiver with a 10-bit address
Slave address
Slave address
Data
Data
R/W A
A
A
A/A
S
2nd bytes
1st 7 bits
“0”
7 bits
8 bits
1 to 8 bits
1 to 8 bits
(4) A master-receiver receives data from a slave-transmitter with a 10-bit address
Slave address
Slave address
Slave address
S
R/W A
A
Sr 1st 7 bits
R/W
1st 7 bits
2nd bytes
7 bits
8 bits
7 bits
“1”
“0”
S: START condition
A: ACK bit
Sr: Restart condition
P: STOP condition
R/W: Read/Write bit
Fig. 73 Address data communication format
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Page 74 of 128
P
A
: Master to slave
: Slave to master
Data
1 to 8 bits
A
Data
1 to 8 bits
A
P
3804 Group (Spec.L)
Example of Master Transmission
An example of master transmission in the standard clock mode,
at the SCL frequency of 100 kHz and in the ACK return mode is
shown below.
(1) Set a slave address in the high-order 7 bits of the I2C slave
address register and “0” into the RWB bit.
(2) Set the ACK return mode and SCL = 100 kHz by setting
“8516” in the I2C clock control register (S2: address 001516).
(3) Set “0016” in the I2C status register (S1: address 001316) so
that transmission/reception mode can become initializing
condition.
(4) Set a communication enable status by setting “0816” in the
I2C control register (S1D: address 001416).
(5) Confirm the bus free condition by the BB flag of the I2C
status register (S1: address 001316).
(6) Set the address data of the destination of transmission in the
high-order 7 bits of the I2C data shift register (S0: address
001116) and set “0” in the least significant bit.
(7) Set “F016” in the I2C status register (S1: address 001316) to
generate a START condition. At this time, an SCL for 1
byte and an ACK clock automatically occur.
(8) Set transmit data in the I2C data shift register (S0: address
0 011 1 6 ) . A t t hi s ti me, a n SCL and an ACK clock
automatically occur.
(9) When transmitting control data of more than 1 byte, repeat
step (8).
(10) Set “D016” in the I2C status register (S1: address 001316) to
generate a STOP condition if ACK is not returned from
slave reception side or transmission ends.
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Example of Slave Reception
An example of slave reception in the high-speed clock mode, at
the SCL frequency of 400 kHz, in the ACK non-return mode and
using the addressing format is shown below.
(1) Set a slave address in the high-order 7 bits of the I2C slave
address register and “0” in the RWB bit.
(2) Set the no ACK clock mode and SCL = 400 kHz by setting
“2516” in the I2C clock control register (S2: address 001516).
(3) Set “0016” in the I2C status register (S1: address 001316) so
that transmission/reception mode can become initializing
condition.
(4) Set a communication enable status by setting “0816” in the
I2C control register (S1D: address 001416).
(5) When a START condition is received, an address
comparison is performed.
(6) • When all transmitted addresses are “0” (general call):
AD0 of the I2C status register (S1: address 001316) is set to
“1” and an interrupt request signal occurs.
• When the transmitted addresses agree with the address set
in (1):
AAS of the I2C status register (S1: address 001316) is set to
“1” and an interrupt request signal occurs.
• In the cases other than the above AD0 and AAS of the I2C
status register (S1: address 001316) are set to “0” and no
interrupt request signal occurs.
(7) Set dummy data in the I2C data shift register (S0: address
001116).
(8) When receiving control data of more than 1 byte, repeat step
(7).
(9) When a STOP condition is detected, the communication
ends.
3804 Group (Spec.L)
Precautions when using multi-master I2C BUS interface
(1) Read-modify-write instruction
The precautions when the read-modify-write instruction such as
SEB, CLB etc. is executed for each register of the multi-master
I2C-BUS interface are described below.
• I2C data shift register (S0: address 001116)
When executing the read-modify-write instruction for this
register during transfer, data may become a value not intended.
• I2C slave address registers 0 to 2 (S0D0 to S0D2: addresses
0FF716 to0FF916)
When the read-modify-write instruction is executed for this
register at detecting the STOP condition, data may become a
value not intended. It is because H/W changes the read/write
bit (RWB) at the above timing.
• I2C status register (S1: address 001316)
Do not execute the read-modify-write instruction for this
register because all bits of this register are changed by H/W.
• I2C control register (S1D: address 001416)
When the read-modify-write instruction is executed for this
register at detecting the START condition or at completing the
byte transfer, data may become a value not intended. Because
H/W changes the bit counter (BC0-BC2) at the above timing.
• I2C clock control register (S2: address 001516)
The read-modify-write instruction can be executed for this
register.
• I2C START/STOP condition control register (S2D: address
001616)
The read-modify-write instruction can be executed for this
register.
(2) START condition generating procedure using
multi-master
1. Procedure example (The necessary conditions of the generating procedure are described as the following 2 to 5.
:
LDA −
(Taking out of slave address value)
SEI
(Interrupt disabled)
BBS 5, S1, BUSBUSY (BB flag confirming and branch process)
BUSFREE:
STA S0
(Writing of slave address value)
LDM #$F0, S1
(Trigger of START condition
generating)
CLI
(Interrupt enabled)
:
BUSBUSY:
CLI
(Interrupt enabled)
:
2. Use “Branch on Bit Set” of “BBS 5, S1, -” for the BB flag
confirming and branch process.
3. Use “STA $12, STX $12” or “STY $12” of the zero page
addressing instruction for writing the slave address value to
the I2C data shift register.
4. Execute the branch instruction of above 2 and the store
instruction of above 3 continuously shown the above procedure example.
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5. Disable interrupts during the following three process steps:
• BB flag confirming
• Writing of slave address value
• Trigger of START condition generating
When the condition of the BB flag is bus busy, enable
interrupts immediately.
(3) RESTART condition generating procedure
1. Procedure example (The necessary conditions of the generating procedure are described as the following 2 to 4.)
Execute the following procedure when the PIN bit is “0”
:
LDM #$00, S1 (Select slave receive mode)
LDA −
(Taking out of slave address value)
SEI
(Interrupt disabled)
STA S0
(Writing of slave address value)
LDM #$F0, S1 (Trigger of RESTART condition generating)
CLI
(Interrupt enabled)
:
2. Select the slave receive mode when the PIN bit is “0”. Do
not write “1” to the PIN bit. Neither “0” nor “1” is specified
for the writing to the BB bit.
The TRX bit becomes “0” and the SDA pin is released.
3. The SCL pin is released by writing the slave address value
to the I2C data shift register.
4. Disable interrupts during the following two process steps:
• Writing of slave address value
• Trigger of RESTART condition generating
(4) Writing to I2C status register
Do not execute an instruction to set the PIN bit to “1” from “0”
and an instruction to set the MST and TRX bits to “0” from “1”
simultaneously. It is because it may enter the state that the SCL
pin is released and the SDA pin is released after about one
machine cycle. Do not execute an instruction to set the MST and
TRX bits to “0” from “1” simultaneously when the PIN bit is
“1”. It is because it may become the same as above.
(5) Process of after STOP condition generating
Do not write data in the I2C data shift register S0 and the I2C
status register S1 until the bus busy flag BB becomes “0” after
generating the STOP condition in the master mode. It is because
the STOP condition waveform might not be normally generated.
Reading to the above registers does not have the problem.
3804 Group (Spec.L)
RESET CIRCUIT
To reset the microcomputer, RESET pin should be held at an “L”
level for 16 cycles or more of X IN . Then the RESET pin is
returned to an “H” level (the power source voltage should be
between 2.7 V and 5.5 V, and the oscillation should be stable),
reset is released. After the reset is completed, the program starts
from the address contained in address FFFD16 (high-order byte)
and address FFFC16 (low-order byte).
Input to the RESET pin in the following procedure.
• When power source is stabilized
(1) Input “L” level to RESET pin.
(2) Input “L” level for 16 cycles or more to XIN pin.
(3) Input “H” level to RESET pin.
• At power-on
(1) Input “L” level to RESET pin.
(2) Increase the power source voltage to 2.7 V.
(3) Wait for td(P-R) until internal power source has stabilized.
(4) Input “L” level for 16 cycles or more to XIN pin.
(5) Input “H” level to RESET pin.
VCC
RESET
VCC
2.7 V
0V
RESET
0.2VCC or less
0V
td(P-R)+XIN16 cycles or more
5V
VCC
RESET
VCC
Power source
voltage detection
circuit
2.7 V
0V
5V
RESET
0V
td(P-R)+XIN16 cycles or more
Example at VCC = 5 V
Fig. 74 Reset circuit example
XIN
φ
RESET
Internal
reset
?
Address
?
?
?
FFFC
FFFD
ADH,L
Reset address from the
vector table.
?
Data
?
?
?
ADL
ADH
SYNC
XIN : 10.5 to 18.5 clock cycles
Notes 1: The frequency relation of f(XIN) and f(φ) is f(XIN) = 8 • f(φ).
2: The question marks (?) indicate an undefined state that depends on the previous state.
Fig. 75 Reset sequence
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3804 Group (Spec.L)
Address
Register contents
Address
Register contents
(1)
Port P0 (P0)
000016
0016
(41) Timer Z (low-order) (TZL)
002816
FF16
(2)
Port P0 direction register (P0D)
000116
0016
(42) Timer Z (high-order) (TZH)
002916
FF16
(3)
Port P1 (P1)
000216
0016
(43) Timer Z mode register (TZM)
002A16
0016
(4)
Port P1 direction register (P1D)
000316
0016
(44) PWM control register (PWMCON)
002B16
0016
(5)
Port P2 (P2)
000416
0016
(45) PWM prescaler (PREPWM)
002C16 X X X X X X X X
(6)
Port P2 direction register (P2D)
000516
0016
(46) PWM register (PWM)
002D16 X X X X X X X X
(7)
Port P3 (P3)
000616
0016
(47) Baud rate generator 3 (BRG3)
002F16 X X X X X X X X
(8)
Port P3 direction register (P3D)
000716
0016
(48) Transmit/Receive buffer register 3 (TB3/RB3) 003016 X X X X X X X X
(9)
Port P4 (P4)
000816
0016
(49) Serial I/O3 status register (SIO3STS)
003116 1 0 0 0 0 0 0 0
(10) Port P4 direction register (P4D)
000916
0016
(50) Serial I/O3 control register (SIO3CON)
003216
(11) Port P5 (P5)
000A16
0016
(51) UART3 control register (UART3CON)
003316 1 1 1 0 0 0 0 0
(12) Port P5 direction register (P5D)
000B16
0016
(52) AD/DA control register (ADCON)
003416 0 0 0 0 1 0 0 0
000C16
0016
(53) AD conversion register 1 (AD1)
003516 X X X X X X X X
000D16
0016
(13) Port P6 (P6)
0016
(54) DA1 conversion register (DA1)
003616
0016
(15) Timer 12, X count source selection register (T12XCSS) 000E16 0 0 1 1 0 0 1 1
(55) DA2 conversion register (DA2)
003716
0016
(16) Timer Y, Z count source selection register (TYZCSS)
000F16 0 0 1 1 0 0 1 1
(56) AD conversion register 2 (AD2)
003816 0 0 0 0 0 0 X X
(17) MISRG
001016
(57) Interrupt source selection register (INTSEL)
003916
(18) I2C data shift register (S0)
001116 X X X X X X X X
(58) Interrupt edge selection register (INTEDGE)
003A16
0016
(19) I2C special mode status register (S3)
001216 0 0 1 0 0 0 0 0
(59) CPU mode register (CPUM)
003B16
0 1 0 0 1 0 0 0
(20) I2C status register (S1)
001316 0 0 0 1 0 0 0 X
(60) Interrupt request register 1 (IREQ1)
003C16
0016
(21) I2C control register (S1D)
001416
0016
(61) Interrupt request register 2 (IREQ2)
003D16
0016
(22) I2C clock control register (S2)
001516
0016
(62) Interrupt control register 1 (ICON1)
003E16
0016
(23) I2C START/STOP condition control register (S2D) 001616 0 0 0 1 1 0 1 0
(63) Interrupt control register 2 (ICON2)
003F16
0016
(24) I2C special mode control register (S3D)
(64) Flash memory control register 0 (FMCR0)
0FE016 0 0 0 0 0 0 0 1
(25) Transmit/Receive buffer register 1 (TB1/RB1) 001816 X X X X X X X X
(65) Flash memory control register 1 (FMCR1)
0FE116 0 1 0 0 0 0 0 0
(26) Serial I/O1 status register (SIO1STS)
001916 1 0 0 0 0 0 0 0
(66) Flash memory control register 2 (FMCR2)
0FE216 0 1 0 0 0 1 0 1
(27) Serial I/O1 control register (SIO1CON)
001A16
(67) Port P0 pull-up control register (PULL0)
0FF016
(28) UART1 control register (UART1CON)
001B16 1 1 1 0 0 0 0 0
(68) Port P1 pull-up control register (PULL1)
0FF116
0016
(29) Baud rate generator 1 (BRG1)
001C16 X X X X X X X X
(69) Port P2 pull-up control register (PULL2)
0FF216
0016
(30) Serial I/O2 control register (SIO2CON)
001D16
(70) Port P3 pull-up control register (PULL3)
0FF316
0016
(31) Watchdog timer control register (WDTCON)
001E16 0 0 1 1 1 1 1 1
(71) Port P4 pull-up control register (PULL4)
0FF416
0016
(32) Serial I/O2 register (SIO2)
001F16 X X X X X X X X
(72) Port P5 pull-up control register (PULL5)
0FF516
0016
(33) Prescaler 12 (PRE12)
002016
FF16
(73) Port P6 pull-up control register (PULL6)
0FF616
0016
(34) Timer 1 (T1)
002116
0116
(74) I2C slave address register 0 (S0D0)
0FF716
0016
(35) Timer 2 (T2)
002216
FF16
(75) I2C slave address register 1 (S0D1)
0FF816
0016
(36) Timer XY mode register (TM)
002316
0016
(76) I2C slave address register 2 (S0D2)
0FF916
0016
(37) Prescaler X (PREX)
002416
FF16
(77) Processor status register
(PS)
X X X X X 1 X X
(38) Timer X (TX)
002516
FF16
(78) Program counter
(PCH)
FFFD16 contents
(39) Prescaler Y (PREY)
002616
FF16
(PCL)
FFFC16 contents
(40) Timer Y (TY)
002716
FF16
(14) Port P6 direction register (P6D)
001716
0016
0016
0016
0016
Note : X: Not fixed.
Since the initial values for other than above mentioned registers and
RAM contents are indefinite at reset, they must be set.
Fig. 76 Internal status at reset
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0016
0016
3804 Group (Spec.L)
CLOCK GENERATING CIRCUIT
The 3804 group (Spec.L) has two built-in oscillation circuits:
main clock XIN-XOUT oscillation circuit and sub clock XCINXCOUT oscillation circuit. An oscillation circuit can be formed by
connecting a resonator between X IN and X OUT (X CIN and
X COUT ). Use the circuit constants in accordance with the
resonator manufacturer’s recommended values. No external
resistor is needed between X IN and X OUT since a feed-back
resistor exists on-chip.(An external feed-back resistor may be
needed depending on conditions.) However, an external feedback resistor is needed between XCIN and XCOUT.
Immediately after power on, only the XIN oscillation circuit
starts oscillating, and XCIN and XCOUT pins function as I/O ports.
• Frequency Control
(1) Middle-speed mode
The internal clock φ is the frequency of XIN divided by 8. After
reset is released, this mode is selected.
(2) High-speed mode
The internal clock φ is half the frequency of XIN.
(3) Low-speed mode
The internal clock φ is half the frequency of XCIN.
(4) Low power dissipation mode
The low power consumption operation can be realized by
stopping the main clock XIN in low-speed mode. To stop the
main clock, set bit 5 of the CPU mode register to “1”. When the
main clock XIN is restarted (by setting the main clock stop bit to
“0”), set sufficient time for oscillation to stabilize.
The sub-clock XCIN-XCOUT oscillating circuit can not directly
input clocks that are generated externally. Accordingly, make
sure to cause an external resonator to oscillate.
Oscillation Control
(1) Stop mode
If the STP instruction is executed, the internal clock φ stops at an
“H” level, and X IN and X CIN oscillators stop. When the
oscillation stabilizing time set after STP instruction released bit
(bit 0 of address 001016) is “0”, the prescaler 12 is set to “FF16”
and timer 1 is set to “0116”. When the oscillation stabilizing time
set after STP instruction released bit is “1”, set the sufficient time
for oscillation of used oscillator to stabilize since nothing is set to
the prescaler 12 and timer 1.
After STP instruction is released, the input of the prescaler 12 is
connected to count source which had set at executing the STP
instruction, and the output of the prescaler 12 is connected to
timer 1. Oscillator restarts when an external interrupt is received,
but the internal clock φ is not supplied to the CPU (remains at
“H”) until timer 1 underflows. The internal clock φ is supplied
for the first time, when timer 1 underflows. This ensures time for
the clock oscillation using the ceramic resonators to be
stabilized. When the oscillator is restarted by reset, apply “L”
level to the RESET pin until the oscillation is stable since a wait
time will not be generated.
In the flash memory L version, the built-in power source circuit
is switched to the low power dissipation mode at executing the
STP instruction to reduce consumption current. At returning
from the STP instruction, the built-in power source circuit is
switched to the normal mode, but a specified time is required
from when the power supply to the flash memory is started until
the flash memory operation is enabled. In this version, set a wait
time of 100 μs or more with the oscillation stabilizing time set
after STP instruction released function by using timer 1.
(2) Wait mode
If the WIT instruction is executed, the internal clock φ stops at an
“H” level, but the oscillator does not stop. The internal clock φ
restarts at reset or when an interrupt is received. Since the
oscillator does not stop, normal operation can be started
immediately after the clock is restarted.
To ensure that the interrupts will be received to release the STP
or WIT state, their interrupt enable bits must be set to “1” before
executing of the STP or WIT instruction.
When releasing the STP state, the input of the prescaler 12 and
timer 1 is connected to the count source which had set at
executing the STP instruction and the prescaler 12 and timer 1
will start counting. Set the timer 1 interrupt enable bit to “0”
before executing the STP instruction.
<Notes>
• If you switch the mode between middle/high-speed and lowspeed, stabilize both XIN and XCIN oscillations. The sufficient
time is required for the sub clock to stabilize, especially
immediately after power on and at returning from stop mode.
When switching the mode between middle/high-speed and
low-speed, set the frequency on condition that f(X IN ) >
3×f(XCIN).
• When using the quartz-crystal oscillator of high frequency,
such as 16 MHz etc., it may be necessary to select a specific
oscillator with the specification demanded.
• When using the oscillation stabilizing time set after STP
instruction released bit set to “1”, evaluate time to stabilize
oscillation of the used oscillator and set the value to the timer 1
and prescaler 12.
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3804 Group (Spec.L)
XCIN XCOUT
XIN
XOUT
Rd
Rf
Rd
CCOUT
CCIN
CIN
COUT
Note 1 : Insert a damping resistor if required.
The resistance will vary depending on the
oscillator and the oscillation drive capacity
setting.
Use the value recommended by the maker of the
oscillator.
Also, if the oscillator manufacturer’s data sheet
specifies that a feedback resistor be added
external to the chip though a feedback resistor
exists on-chip, insert a feedback resistor between
XIN and XOUT following the instruction.
Fig. 77 Ceramic resonator circuit
X IN
X COUT
X CIN
Rf
C CIN
X OUT
Open
Rd
External oscillation
circuit
C COUT
V CC
V CC
V SS
V SS
Fig. 78 External clock input circuit
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3804 Group (Spec.L)
XCOUT
XCIN
“0”
“1”
Port XC
switch bit
XIN
XOUT
(4)
Main clock division ratio
selection bits(1)
Divider
Low-speed
mode
1/2
Timer 1
Prescaler 12
1/4
High-speed or
middle-speed mode
(3)
Reset or
STP instruction(2)
Main clock division ratio
selection bits(1)
Middle-speed mode
Timing φ (internal clock)
High-speed or
low-speed mode
Main clock stop bit
Q
S
S
R
STP
instruction
WIT
instruction
R
Q
Reset
Q S
R
STP
instruction
Reset
Interrupt disable flag l
Interrupt request
Notes 1: Either high-speed, middle-speed or low-speed mode is selected by bits 7 and 6 of the CPU mode register.
When low-speed mode is selected, set port XC switch bit (b4) to “1”.
2: f(XIN)/16 is supplied as the count source to the prescaler 12 at reset, the count source before executing the STP instruction is
supplied as the count source at executing STP instruction.
3: When bit 0 of MISRG is “0”, timer 1 is set “0116” and prescaler 12 is set “FF16” automatically. When bit 0 of MISRG is “1” , set the
appropriate value to them in accordance with oscillation stabilizing time required by the using oscillator because nothing is
automatically set into timer 1 and prescaler 12.
4: Although a feed-back resistor exists on-chip, an external feed-back resistor may be needed depending on conditions.
Fig. 79 System clock generating circuit block diagram (Single-chip mode)
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3804 Group (Spec.L)
Reset
”0
”
→
C M ”←
0”
“1 M 6 →”
C ”←
“1
Middle-speed mode
(f(φ) = 1 MHz)
CM7=0
CM6=1
CM5=0 (8 MHz oscillating)
CM4=1 (32 kHz oscillating)
C
“0 M 4
C M ”←
“1 6 → ”
1”
”←
→
”0
”
CM6
“1”←→”0”
C
“0 M7
C M ”← →
“1 6
”1
”←
”
→
”0
”
High-speed mode
(f(φ) = 4 MHz)
CM7=0
CM6=0
CM5=0 (8 MHz oscillating)
CM4=0 (32 kHz stopped)
CM4
“1”←→”0”
4
CM6
“1”←→”0”
High-speed mode
(f(φ) = 4 MHz)
CM7=0
CM6=0
CM5=0 (8 MHz oscillating)
CM4=1 (32 kHz oscillating)
CM7
“1”←→”0”
CM4
“1”←→”0”
Middle-speed mode
(f(φ) = 1 MHz)
CM7=0
CM6=1
CM5=0 (8 MHz oscillating)
CM4=0 (32 kHz stopped)
CM5
“1”←→”0”
Low-speed mode
(f(φ) = 16 kHz)
CM7=1
CM6=0
CM5=0 (8 MHz oscillating)
CM4=1 (32 kHz oscillating)
Low-speed mode
(f(φ) = 16 kHz)
CM7=1
CM6=0
CM5=1 (8 MHz stopped)
CM4=1 (32 kHz oscillating)
b7
b4
CPU mode register
(CPUM : address 003B 16)
CM4 : Port XC switch bit
0 : I/O port function (stop oscillating)
1 : XCIN-XCOUT oscillating function
CM5 : Main clock (XIN-XOUT) stop bit
0 : Operating
1 : Stopped
CM7, CM6: Main clock division ratio selection bit
b7 b6
0 0 : φ = f(XIN)/2 (High-speed mode)
0 1 : φ = f(XIN)/8 (Middle-speed mode)
1 0 : φ = f(XCIN)/2 (Low-speed mode)
1 1 : Not available
Notes 1: Switch the mode by the allows shown between the mode blocks. (Do not switch between the modes directly without an
allow.)
2: The all modes can be switched to the stop mode or the wait mode and return to the source mode when the stop mode or the
wait mode is ended.
3: Timer operates in the wait mode.
4: When the stop mode is ended, a delay of approximately 1 ms occurs by connecting prescaler 12 and Timer 1 in middle/highspeed mode.
5: When the stop mode is ended, a delay of approximately 0.25 s occurs by Timer 1 and Timer 2 in low-speed mode.
6: Wait until oscillation stabilizes after oscillating the main clock X IN before the switching from the low-speed mode to middle/
high-speed mode.
7: The example assumes that 8 MHz is being applied to the X IN pin and 32 kHz to the X CIN pin. φ indicates the internal clock.
Fig. 80 State transitions of system clock
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3804 Group (Spec.L)
FLASH MEMORY MODE
The 3804 group (Spec.L)’s flash memory version has the flash
memory that can be rewritten with a single power source.
For this flash memory, three flash memory modes are available
in which to read, program, and erase: the parallel I/O and
standard serial I/O modes in which the flash memory can be
manipulated using a programmer and the CPU rewrite mode in
which the flash memory can be manipulated by the Central
Processing Unit (CPU).
This flash memory version has some blocks on the flash memory
as shown in Figure 81 and each block can be erased.
In addition to the ordinary User ROM area to store the MCU
operation control program, the flash memory has a Boot ROM
area that is used to store a program to control rewriting in CPU
rewrite and standard serial I/O modes. This Boot ROM area has
had a standard serial I/O mode control program stored in it when
shipped from the factory. However, the user can write a rewrite
control program in this area that suits the user’s application
system. This Boot ROM area can be rewritten in only parallel I/O
mode.
Summary
Table 15 lists the summary of the 3804 group (Spec.L) flash
memory version.
Table 15 Summary of 3804 group (Spec.L)’s flash memory version
Item
Power source voltage (VCC)
Program/Erase VPP voltage (VPP)
Flash memory mode
Erase block division
Specifications
User ROM area/Data ROM area
Boot ROM area (1)
Program method
Erase method
Program/Erase control method
Number of commands
Number of program/Erase times
ROM code protection
NOTE:
VCC = 2.7 to 5.5 V
VCC = 2.7 to 5.5 V
3 modes; Parallel I/O mode, Standard serial I/O mode, CPU
rewrite mode
Refer to Figure 81.
Not divided (4 Kbytes)
In units of bytes
Block erase
Program/Erase control by software command
5 commands
100(Max.)
Available in parallel I/O mode and standard serial I/O mode
1. The Boot ROM area has had a standard serial I/O mode control program stored in it when shipped from the factory.
This Boot ROM area can be erased and written in only parallel I/O mode.
Table 16 Electrical characteristics of flash memory (program ROM)
Symbol
−
−
Parameter
Byte programming time
(Block 1)
(Block 2)
Block erase time
(Block 3)
(Block A, B)
NOTES:
Test conditions
VCC = 5.0 V, Topr = 25 °C
VCC = 5.0 V, Topr = 25 °C
Min.
−
−
−
−
−
Limits
Typ.
60
0.5
0.9
1.3
0.3
Max.
400
9
9
9
9
Unit
μs
s
s
s
s
1. VCC = AVCC = 2.7 V to 5.5 V, Topr = 0 °C to 60 °C, unless otherwise noted.
2. Definition of programming/erase count
The programming/erase count refers to the number of erase operations per block. For example, if block A is a 2 K-byte block and
2,048 1-byte writes are performed, all to different addresses, after which block A is erased, the programming/erase count is 1. Note
that for each erase operation it is not possible to perform more than one programming (write) operation to the same address
(overwrites prohibited).
3. This is the number of times for which all electrical characteristics are guaranteed after a programming or erase operation. (The
guarantee covers the range from 1 to maximum value.)
4. On systems where reprogramming is performed a large number of times, it is possible to reduce the effective number of overwrites
by sequentially shifting the write address, so that as much of the available area of the block is used up through successive
programming (write) operations before an erase operation is performed. For example, if each programming operation uses 16 bytes
of space, a maximum of 128 programming operations may be performed before it becomes necessary to erase the block in order to
continue. In this way the effective number of overwrites can be kept low. The effective overwrite count can be further reduced by
evenly dividing operations between block A and block B. It is recommended that data be retained on the number of times each
block has been erased and a limit count set.
5. If a block erase error occurs, execute the clear status register command followed by the block erase command a minimum of three
times and until the erase error is no longer generated.
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3804 Group (Spec.L)
Boot Mode
The control program for CPU rewrite mode must be written into
the User ROM or Boot ROM area in parallel I/O mode
beforehand. (If the control program is written into the Boot ROM
area, the standard serial I/O mode becomes unusable.)
See Figure 81 for details about the Boot ROM area.
Normal microcomputer mode is entered when the
microcomputer is reset with pulling CNVSS pin low. In this case,
the CPU starts operating using the control program in the User
ROM area.
When the microcomputer is reset and the CNVSS pin high after
pulling the P45/TxD1 pin and CNVSS pin high, the CPU starts
operating (start address of program is stored into addresses
FFFC 16 and FFFD 16 ) using the control program in the Boot
ROM area. This mode is called the “Boot mode”. Also, User
ROM area can be rewritten using the control program in the Boot
ROM area.
CPU Rewrite Mode
In CPU rewrite mode, the internal flash memory can be operated
on (read, program, or erase) under control of the Central
Processing Unit (CPU).
In CPU rewrite mode, only the User ROM area shown in Figure
81 can be rewritten; the Boot ROM area cannot be rewritten.
Make sure the program and block erase commands are issued for
only the User ROM area and each block area.
The control program for CPU rewrite mode can be stored in
either User ROM or Boot ROM area. In the CPU rewrite mode,
because the flash memory cannot be read from the CPU, the
rewrite control program must be transferred to internal RAM
area before it can be executed.
Block Address
Block addresses refer to the maximum address of each block.
These addresses are used in the block erase command.
000016
User ROM area
SFR area
100016
004016
Internal RAM area
(2 Kbytes)
RAM
180016
Data block B:
2 Kbytes
Data block A:
2 Kbytes
200016
083F16
Block 3: 24 Kbytes
0FE016
SFR area
800016
0FFF16
100016
Block 2: 16 Kbytes
C00016
Internal flash memory area
(60 Kbytes)
Notes 1: The boot ROM area can be rewritten
in a parallel I/O mode. (Access to
except boot ROM area is disabled.)
2: To specify a block, use the maximum
address in the block.
Block 1: 8 Kbytes
F00016
E00016
Boot ROM area
4 Kbytes
Block 0: 8 Kbytes
FFFF16
FFFF16
Fig. 81 Block diagram of built-in flash memory
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FFFF16
3804 Group (Spec.L)
Outline Performance
CPU rewrite mode is usable in the single-chip or Boot mode. The
only User ROM area can be rewritten.
In CPU rewrite mode, the CPU erases, programs and reads the
internal flash memory as instructed by software commands. This
rewrite control program must be transferred to internal RAM
area before it can be executed.
The MCU enters CPU rewrite mode by setting “1” to the CPU
rewrite mode select bit (bit 1 of address 0FE016). Then, software
commands can be accepted.
Use software commands to control program and erase
operations. Whether a program or erase operation has terminated
normally or in error can be verified by reading the status register.
Figure 82 shows the flash memory control register 0.
Bit 0 of the flash memory control register 0 is the RY/BY status
flag used exclusively to read the operating status of the flash
memory. During programming and erase operations, it is “0”
(busy). Otherwise, it is “1” (ready).
Bit 1 of the flash memory control register 0 is the CPU rewrite
mode select bit. When this bit is set to “1”, the MCU enters CPU
rewrite mode. And then, software commands can be accepted. In
CPU rewrite mode, the CPU becomes unable to access the
internal flash memory directly. Therefore, use the control
program in the internal RAM for write to bit 1. To set this bit 1 to
“1”, it is necessary to write “0” and then write “1” in succession
to bit 1. The bit can be set to “0” by only writing “0”.
Bit 2 of the flash memory control register 0 is the 8 KB user
block E/W enable bit. By setting combination of bit 4 of the flash
memory control register 2 and this bit as shown in Table 17, E/W
is disabled to user block in the CPU rewriting mode.
Bit 3 of the flash memory control register 0 is the flash memory
reset bit used to reset the control circuit of internal flash memory.
This bit is used when flash memory access has failed. When the
CPU rewrite mode select bit is “1”, setting “1” for this bit resets
the control circuit. To release the reset, it is necessary to set this
bit to “0”.
Bit 5 of the flash memory control register 0 is the User ROM
area select bit and is valid only in the boot mode. Setting this bit
to “1” in the boot mode switches an accessible area from the boot
ROM area to the user ROM area. To use the CPU rewrite mode
in the boot mode, set this bit to “1”. To rewrite bit 5, execute the
user original reprogramming control software transferred to the
internal RAM in advance.
Bit 6 of the flash memory control register 0 is the program status
flag. This bit is set to “1” when writing to flash memory is failed.
When program error occurs, the block cannot be used.
Bit 7 of the flash memory control register 0 is the erase status
flag.
This bit is set to “1” when erasing flash memory is failed. When
erase error occurs, the block cannot be used.
Figure 83 shows the flash memory control register 1.
Bit 0 of the flash memory control register 1 is the Erase suspend
enable bit. By setting this bit to “1”, the erase suspend mode to
suspend erase processing temporary when block erase command
is executed can be used. In order to set this bit to “1”, writing “0”
and “1” in succession to bit 0. In order to set this bit to “0”, write
“0” only to bit 0.
Bit 1 of the flash memory control register 1 is the erase suspend
request bit. By setting this bit to “1” when erase suspend enable
bit is “1”, the erase processing is suspended.
Bit 6 of the flash memory control register 1 is the erase suspend
flag. This bit is cleared to “0” at the flash erasing.
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b7
b0
Flash memory control register 0
(FMCR0: address : 0FE016: initial value: 0116)
RY/BY status flag
0 : Busy (being written or erased)
1 : Ready
CPU rewrite mode select bit(1)
0 : CPU rewrite mode invalid
1 : CPU rewrite mode valid
8 KB user block E/W enable bit(1, 2)
0 : E/W disabled
1 : E/W enabled
Flash memory reset bit(3, 4)
0 : Normal operation
1 : reset
Not used (do not write “1” to this bit.)
User ROM area select bit(5)
0 : Boot ROM area is accessed
1 : User ROM area is accessed
Program status flag
0: Pass
1: Error
Erase status flag
0: Pass
1: Error
Notes 1: For this bit to be set to “1”, the user needs to write a “0” and then a
“1” to it in succession. For this bit to be set to “0”, write “0” only to this
bit.
2: This bit can be written only when CPU rewrite mode select bit is “1”.
3: Effective only when the CPU rewrite mode select bit = “1”. Fix this
bit to “0” when the CPU rewrite mode select bit is “0”.
4: When setting this bit to “1” (when the control circuit of flash memory
is reset), the flash memory cannot be accessed for 10 μs.
5: Write to this bit in program on RAM
Fig. 82 Structure of flash memory control register 0
b7
b0
Flash memory control register 1
(FMCR1: address : 0FE116: initial value: 4016)
Erase Suspend enable bit(1)
0 : Suspend invalid
1 : Suspend valid
Erase Suspend request bit(2)
0 : Erase restart
1 : Suspend request
Not used (do not write “1” to this bit.)
Erase Suspend flag
0 : Erase active
1 : Erase inactive (Erase Suspend mode)
Not used (do not write “1” to this bit.)
Notes 1: For this bit to be set to “1”, the user needs to write a “0” and then a
“1” to it in succession. For this bit to be set to “0”, write “0” only to this
bit.
2: Effective only when the suspend enable bit = “1”.
Fig. 83 Structure of flash memory control register 1
3804 Group (Spec.L)
b7
b0
Flash memory control register 2
(FMCR2: address : 0FE216: initial value: 4516)
Not used
Not used (do not write “1” to this bit.)
Not used
All user block E/W enable bit(1, 2)
0 : E/W disabled
1 : E/W enabled
Not used
Notes 1: For this bit to be set to “1”, the user needs to write a “0” and then a
“1” to it in succession. For this bit to be set to “0”, write “0” only to this
bit.
2: Effective only when the CPU rewrite mode select bit = “1”.
Fig. 84 Structure of flash memory control register 2
Table 17 State of E/W inhibition function
All user block E/W
enable bit
8 KB user block
E/W enable bit
8 KB × 2 block
Addresses C00016 to FFFF16
16 KB + 24 KB block
Addresses 200016 to BFFF16
Data block
Addresses 100016 to 1FFF16
0
0
E/W disabled
E/W disabled
E/W enabled
0
1
E/W disabled
E/W disabled
E/W enabled
1
0
E/W disabled
E/W enabled
E/W enabled
1
1
E/W enabled
E/W enabled
E/W enabled
Figure 85 shows a flowchart for setting/releasing CPU rewrite mode.
Start
Single-chip mode or Boot mode
Set CPU mode register(1)
Transfer CPU rewrite mode control program to internal RAM
Jump to control program transferred to internal RAM
(Subsequent operations are executed by control program in
this RAM)
Set CPU rewrite mode select bit to “1” (by writing “0” and
then “1” in succession)
Set all user block E/W enable bit to “1” (by writing “0” and
then “1” in succession)
Set 8 KB user block E/W enable bit (At E/W disabled; writing
“0” , at E/W enabled;
writing “0” and then “1” in succession
Using software command executes erase, program, or other
operation
Execute read array command(2)
Set all user block E/W enable bit to “0”
Set 8 KB user block E/W enable bit to “0”
Write “0” to CPU rewrite mode select bit
End
Notes 1: Set the main clock as follows depending on the clock division ratio selection bits of CPU mode register (bits 6, 7 of address 003B16).
2: Before exiting the CPU rewrite mode after completing erase or program operation, always be sure to execute the read array
command.
Fig. 85 CPU rewrite mode set/release flowchart be sure to execute
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3804 Group (Spec.L)
<Notes on CPU Rewrite Mode>
Take the notes described below when rewriting the flash memory
in CPU rewrite mode.
(1) Operation speed
During CPU rewrite mode, set the system clock φ to 4.0 MHz or
less using the clock division ratio selection bits (bits 6 and 7 of
address 003B16).
(2) Instructions inhibited against use
The instructions which refer to the internal data of the flash
memory cannot be used during CPU rewrite mode.
(3) Interrupts
The interrupts cannot be used during CPU rewrite mode because
they refer to the internal data of the flash memory.
(4) Watchdog timer
If the watchdog timer has been already activated, internal reset
due to an underflow will not occur because the watchdog timer is
surely cleared during program or erase.
(5) Reset
Reset is always valid. The MCU is activated using the boot mode
at release of reset in the condition of CNVSS = “H”, so that the
program will begin at the address which is stored in addresses
FFFC16 and FFFD16 of the boot ROM area.
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3804 Group (Spec.L)
Software Commands
Table 18 lists the software commands.
After setting the CPU rewrite mode select bit to “1”, execute a
software command to specify an erase or program operation.
Each software command is explained below.
The RY/BY status flag of the flash memory control register is
“0” during write operation and “1” when the write operation is
completed as is the status register bit 7.
At program end, program results can be checked by reading the
status register.
• Read Array Command (FF16)
The read array mode is entered by writing the command code
“FF16” in the first bus cycle. When an address to be read is input
in one of the bus cycles that follow, the contents of the specified
address are read out at the data bus (D0 to D7).
The read array mode is retained until another command is
written.
• Read Status Register Command (7016)
When the command code “7016” is written in the first bus cycle,
the contents of the status register are read out at the data bus (D0
to D7) by a read in the second bus cycle.
The status register is explained in the next section.
Start
Write “4016”
Write
Read status register
• Clear Status Register Command (5016)
This command is used to clear the bits SR4 and SR5 of the status
register after they have been set. These bits indicate that
operation has ended in an error. To use this command, write the
command code “5016” in the first bus cycle.
• Program Command (4016)
Program operation starts when the command code “4016 ” is
written in the first bus cycle. Then, if the address and data to
program are written in the 2nd bus cycle, program operation
(data programming and verification) will start.
Whether the write operation is completed can be confirmed by
read status register or the RY/BY status flag. When the program
starts, the read status register mode is entered automatically and
the contents of the status register is read at the data bus (D0 to
D7). The status register bit 7 (SR7) is set to “0” at the same time
the write operation starts and is returned to “1” upon completion
of the write operation. In this case, the read status register mode
remains active until the read array command (FF16) is written.
Write address
Write data
SR7 = “1”?
or
RY/BY = “1”?
NO
YES
NO
Program error
SR4 = “0”?
YES
Program completed
Fig. 86 Program flowchart
Table 18 List of software commands (CPU rewrite mode)
First bus cycle
Second bus cycle
cycle
number
Mode
Address
Data
(D0 to D7)
Read array
1
Write
X(4)
FF16
Read status register
2
Write
X
7016
Clear status register
1
Write
X
5016
Program
2
Write
X
4016
Command
Block erase
2
Write
X
2016
NOTES:
1.
2.
3.
4.
SRD = Status Register Data
WA = Write Address, WD = Write Data
BA = Block Address to be erased (Input the maximum address of each block.)
X denotes a given address in the User ROM area.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 88 of 128
Mode
Address
Data
(D0 to D7)
Read
X
SRD(1)
Write
WA(2)
WD(2)
Write
BA(3)
D016
3804 Group (Spec.L)
• Block Erase Command (2016/D016)
By writing the command code “2016” in the first bus cycle and
the confirmation command code “D016” and the block address in
the second bus cycle that follows, the block erase (erase and
erase verify) operation starts for the block address of the flash
memory to be specified.
Whether the block erase operation is completed can be confirmed
by read status register or the RY/BY status flag of flash memory
control register. At the same time the block erase operation
starts, the read status register mode is automatically entered, so
that the contents of the status register can be read out. The status
register
bit 7 (SR7) is set to “0” at the same time the block erase
operation starts and is returned to “1” upon completion of the
block erase operation. In this case, the read status register mode
remains active until the read array command (FF16) is written.
The RY/BY status flag is “0” during block erase operation and
“1” when the block erase operation is completed as is the status
register bit 7.
After the block erase ends, erase results can be checked by
reading the status register. For details, refer to the section where
the status register is detailed.
Start
Write “2016”
Write “D016”
Blockaddress
Read status register
SR7 = “1”?
or
RY/BY = “1”?
NO
YES
SR5 = “0”?
YES
Erase completed
(write read command
“FF16”)
Fig. 87 Erase flowchart
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 89 of 128
NO
Erase error
3804 Group (Spec.L)
• Status Register
The status register shows the operating status of the flash
memory and whether erase operations and programs ended
successfully or in error. It can be read in the following ways:
(1) By reading an arbitrary address from the User ROM area
after writing the read status register command (7016)
(2) By reading an arbitrary address from the User ROM area in
the period from when the program starts or erase operation
starts to when the read array command (FF16) is input.
Also, the status register can be cleared by writing the clear status
register command (5016).
After reset, the status register is set to “8016”.
Table 19 shows the status register. Each bit in this register is
explained below.
• Sequencer status (SR7)
The sequencer status indicates the operating status of the flash
memory. This bit is set to “0” (busy) during write or erase
operation and is set to “1” when these operations ends.
After power-on, the sequencer status is set to “1” (ready).
• Erase status (SR5)
The erase status indicates the operating status of erase operation.
If an erase error occurs, it is set to “1”. When the erase status is
cleared, it is reset to “0”.
• Program status (SR4)
The program status indicates the operating status of write
operation.
When a write error occurs, it is set to “1”.
The program status is reset to “0” when it is cleared.
If “1” is written for any of the SR5 and SR4 bits, the read array,
program, and block erase commands are not accepted. Before
executing these commands, execute the clear status register
command (5016) and clear the status register.
Also, if any commands are not correct, both SR5 and SR4 are set
to “1”.
Table 19 Definition of each bit in status register
Each bit of
SRD bits
Status name
SR7 (bit 7)
SR6 (bit 6)
SR5 (bit 5)
SR4 (bit 4)
SR3 (bit 3)
SR2 (bit 2)
SR1 (bit 1)
SR0 (bit 0)
Sequencer status
Reserved
Erase status
Program status
Reserved
Reserved
Reserved
Reserved
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 90 of 128
Definition
“1”
Ready
−
Terminated in error
Terminated in error
−
−
−
−
“0”
Busy
−
Terminated normally
Terminated normally
−
−
−
−
3804 Group (Spec.L)
Full Status Check
By performing full status check, it is possible to know the
execution results of erase and program operations. Figure 88
shows a full status check flowchart and the action to be taken
when each error occurs.
Read status register
SR4 = “1”
YES
and
SR5 = “1”?
Command
sequence error
Execute the clear status register command (50 16)
to clear the status register. Try performing the
operation one more time after confirming that the
command is entered correctly.
NO
SR5 = “0”?
NO
Erase error
Should an erase error occur, the block in error
cannot be used.
YES
SR4 = “0”?
NO
Program error
Should a program error occur, the block in error
cannot be used.
YES
End (block erase, program)
Note: When one of SR5 and SR4 is set to “1”, none of the read array, program,
and block erase commands is accepted. Execute the clear status register
command (5016) before executing these commands.
Fig. 88 Full status check flowchart and remedial procedure for errors
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 91 of 128
3804 Group (Spec.L)
Functions To Inhibit Rewriting Flash Memory Version
To prevent the contents of internal flash memory from being read
out or rewritten easily, this MCU incorporates a ROM code
protect function for use in parallel I/O mode and an ID code
check function for use in standard serial I/O mode.
• ROM Code Protect Function
The ROM code protect function is the function to inhibit reading
out or modifying the contents of internal flash memory by using
the ROM code protect control address (address FFDB 16 ) in
parallel I/O mode. Figure 89 shows the ROM code protect
control address (address FFDB16). (This address exists in the
User ROM area.)
b7
If one or both of the pair of ROM code protect bits is set to “0”,
the ROM code protect is turned on, so that the contents of
internal flash memory are protected against readout and
modification. The ROM code protect is implemented in two
levels. If level 2 is selected, the flash memory is protected even
against readout by a shipment inspection LSI tester, etc. When an
attempt is made to select both level 1 and level 2, level 2 is
selected by default.
If both of the two ROM code protect reset bits are set to “00”, the
ROM code protect is turned off, so that the contents of internal
flash memory can be readout or modified. Once the ROM code
protect is turned on, the contents of the ROM code protect reset
bits cannot be modified in parallel I/O mode. Use the serial I/O
or CPU rewrite mode to rewrite the contents of the ROM code
protect reset bits.
Rewriting of only the ROM code protect control address (address
FFDB16) cannot be performed. When rewriting the ROM code
protect reset bit, rewrite the whole user ROM area (block 0)
containing the ROM code protect control address.
b0
1
1
ROM code protect control address (address FFDB16)
ROMCP (FF16 when shipped)
Reserved bits (“1” at read/write)
ROM code protect level 2 set bits (ROMCP2)(1, 2)
b3 b2
0 0 : Protect enabled
0 1 : Protect enabled
1 0 : Protect enabled
1 1 : Protect disabled
ROM code protect reset bits (ROMCR)(3)
b5 b4
0 0 : Protect removed
0 1 : Protect set bits effective
1 0 : Protect set bits effective
1 1 : Protect set bits effective
ROM code protect level 1 set bits (ROMCP1)(1)
b7 b6
0 0 : Protect enabled
0 1 : Protect enabled
1 0 : Protect enabled
1 1 : Protect disabled
Notes 1: When ROM code protect is turned on, the internal flash memory is protected
against readout or modification in parallel I/O mode.
2: When ROM code protect level 2 is turned on, ROM code readout by a
shipment inspection LSI tester, etc. also is inhibited.
3: The ROM code protect reset bits can be used to turn off ROM code protect
level 1 and ROM code protect level 2. However, since these bits cannot be
modified in parallel I/O mode, they need to be rewritten in serial I/O mode or
CPU rewrite mode.
Fig. 89 Structure of ROM code protect control address
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 92 of 128
3804 Group (Spec.L)
• ID Code Check Function
Use this function in standard serial I/O mode. When the contents
of the flash memory are not blank, the ID code sent from the
programmer is compared with the ID code written in the flash
memory to see if they match. If the ID codes do not match, the
commands sent from the programmer are not accepted. The ID
code consists of 8-bit data, and its areas are FFD416 to FFDA16.
Write a program which has had the ID code preset at these
addresses to the flash memory.
Address
FFD416
ID1
FFD516
ID2
FFD616
ID3
FFD716
ID4
FFD816
ID5
FFD916
ID6
FFDA16
ID7
FFDB16
ROM code protect control
Interrupt vector area
Fig. 90 ID code store addresses
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 93 of 128
3804 Group (Spec.L)
Parallel I/O Mode
The parallel I/O mode is used to input/output software
commands, address and data in parallel for operation (read,
program and erase) to internal flash memory.
Use the external device (writer) only for 3804 group (Spec.L)
flash memory version. For details, refer to the user’s manual of
each writer manufacturer.
• User ROM and Boot ROM Areas
In parallel I/O mode, the User ROM and Boot ROM areas shown
in Figure 81 can be rewritten. Both areas of flash memory can be
operated on in the same way.
The Boot ROM area is 4 Kbytes in size and located at addresses
F00016 through FFFF 16 . Make sure program and block erase
operations are always performed within this address range.
(Access to any location outside this address range is prohibited.)
In the Boot ROM area, an erase block operation is applied to
only one 4 Kbyte block. The boot ROM area has had a standard
serial I/O mode control program stored in it when shipped from
the factory. Therefore, using the MCU in standard serial I/O
mode, do not rewrite to the Boot ROM area.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 94 of 128
3804 Group (Spec.L)
Standard serial I/O Mode
The standard serial I/O mode inputs and outputs the software
commands, addresses and data needed to operate (read, program,
erase, etc.) the internal flash memory. This I/O is clock
synchronized serial. This mode requires a purpose-specific
peripheral unit.
The standard serial I/O mode is different from the parallel I/O
mode in that the CPU controls flash memory rewrite (uses the
CPU rewrite mode), rewrite data input and so forth. The standard
serial I/O mode is started by connecting “H” to the CNVSS pin
and “H” to the P45 (BOOTENT) pin, and releasing the reset
operation. (In the ordinary microcomputer mode, set CNVSS pin
to “L” level.) This control program is written in the Boot ROM
area when the product is shipped from Renesas. Accordingly,
make note of the fact that the standard serial I/O mode cannot be
used if the Boot ROM area is rewritten in parallel I/O mode. The
standard serial I/ O mode has standard serial I/O mode 1 of the
clock synchronous serial and standard serial I/O mode 2 of the
clock asynchronous serial. Table 20 and 21 show description of
pin function (standard serial I/O mode). Figures 91 to 96 show
the pin connections for the standard serial I/O mode. Figures 97
and 98 show the operating waveform for standard serial I/O
mode 1 and the operating waveform for standard serial I/O mode
1, respectively. Figures 99 and 100 show the connection
examples in standard serial I/O mode.
In standard serial I/O mode, only the User ROM area shown in
Figure 81 can be rewritten. The Boot ROM area cannot be
written.
In standard serial I/O mode, a 7-byte ID code is used. When there
is data in the flash memory, this function determines whether the
ID code sent from the peripheral unit (programmer) and those
written in the flash memory match. The commands sent from the
peripheral unit (programmer) are not accepted unless the ID code
matches.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 95 of 128
3804 Group (Spec.L)
Table 20 Description of pin function (Flash Memory Serial I/O Mode 1)
Pin name
VCC,VSS
CNVSS
RESET
XIN
XOUT
AVSS
VREF
P00−P07, P10−P17,
P20−P27, P30−P37,
P40−P43, P50−P57,
P60−P67
P44
P45
P46
P47
Signal name
Power supply
CNVSS
Reset input
I/O
I
I
I
Function
Apply 2.7 to 5.5 V to the VCC pin and 0 V to the VSS pin.
After input of port is set, input “H” level.
Clock input
Clock output
Analog power supply input
Reference voltage input
I/O port
I
O
Reset input pin. To reset the microcomputer, RESET pin should be
held at an “L” level for 16 cycles or more of XIN.
Connect an oscillation circuit between the XIN and XOUT pins.
As for the connection method, refer to the “clock generating circuit”.
I
I/O
Connect AVSS to VSS.
Apply reference voltage of A/D to this pin.
Input “L” or “H” level, or keep open.
RxD input
TxD output
SCLK input
BUSY output
I
O
I
O
Serial data input pin.
Serial data output pin.
Serial clock input pin.
BUSY signal output pin.
Table 21 Description of pin function (Flash Memory Serial I/O Mode 2)
Pin name
VCC,VSS
CNVSS
RESET
XIN
XOUT
AVSS
VREF
P00−P07, P10−P17,
P20−P27, P30−P37,
P40−P43, P50−P57,
P60−P67
P44
P45
P46
P47
Signal name
Power supply
CNVSS
Reset input
I/O
I
I
I
Clock input
Clock output
Analog power supply input
Reference voltage input
I/O port
I
O
Reset input pin. To reset the microcomputer, RESET pin should be
held at an “L” level for 16 cycles or more of XIN.
Connect an oscillation circuit between the XIN and XOUT pins.
As for the connection method, refer to the “clock generating circuit”.
I
I/O
Connect AVSS to VSS.
Apply reference voltage of A/D to this pin.
Input “L” or “H” level, or keep open.
RxD input
TxD output
SCLK input
BUSY output
I
O
I
O
Serial data input pin.
Serial data output pin.
Input “L” level.
BUSY signal output pin.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 96 of 128
Function
Apply 2.7 to 5.5 V to the VCC pin and 0 V to the VSS pin.
After input of port is set, input “H” level.
P14
P15
P16
P17
38
36
35
34
33
37
P11/INT01
P12
P13
39
P07/AN15
42
P10/INT41
P06/AN14
43
40
P05/AN13
44
41
P03/AN11
P04/AN12
45
P01/AN9
P02/AN10
46
P00/AN8
47
P37/SRDY3
49
32
P20(LED0)
P36/SCLK3
50
31
P21(LED1)
P35/TXD3
51
30
P22(LED2)
P34/RXD3
52
29
P23(LED3)
P33/SCL
53
28
P24(LED4)
P32/SDA
54
27
P25(LED5)
P31/DA2
55
26
P26(LED6)
P30/DA1
56
25
P27(LED7)
VCC
57
24
VSS
VREF
58
23
XOUT
M38049FFLHP/KP
VSS
*
9
10
11
12
13
14
15
16
P51/SOUT2
P50/SIN2
P47/SRDY1/CNTR2
P46/SCLK1
P45/TXD1
P44/RXD1
P43/INT2
P42/INT1
P52/SCLK2
17
8
64
P53/SRDY2
CNVSS
P63/AN3
7
CNVSS
6
18
P54/CNTR0
RESET
63
P55/CNTR1
RESET
P64/AN4
5
P41/INT00/XCIN
19
4
20
62
P57/INT3
61
P65/AN5
P56/PWM
P66/AN6
3
P40/INT40/XCOUT
P60/AN0
XIN
21
2
22
60
1
59
P61/AN1
AVSS
P67/AN7
P62/AN2
VCC
48
3804 Group (Spec.L)
*Connect oscillation circuit.
RxD
indicates flash memory pin.
TxD
SCLK
BUSY
Package code: PLQP0064KB-A (64P6Q-A) / PLQP0064GA-A (64P6U-A)
Fig. 91 Connection for standard serial I/O mode 1 (M38049FFLHP/KP)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 97 of 128
P14
P15
P16
P17
38
36
35
34
33
37
P11/INT01
P12
P13
39
P07/AN15
42
P10/INT41
P06/AN14
43
40
P05/AN13
44
41
P03/AN11
P04/AN12
45
P01/AN9
P02/AN10
46
P00/AN8
47
P37/SRDY3
49
32
P20(LED0)
P36/SCLK3
50
31
P21(LED1)
P35/TXD3
51
30
P22(LED2)
P34/RXD3
52
29
P23(LED3)
P33/SCL
53
28
P24(LED4)
P32/SDA
54
27
P25(LED5)
P31/DA2
55
26
P26(LED6)
P30/DA1
56
25
P27(LED7)
VCC
57
24
VSS
VREF
58
23
XOUT
M38049FFLHP/KP
VSS
*
9
10
11
12
13
14
15
16
P51/SOUT2
P50/SIN2
P47/SRDY1/CNTR2
P46/SCLK1
P45/TXD1
P44/RXD1
P43/INT2
P42/INT1
P52/SCLK2
17
8
64
P53/SRDY2
CNVSS
P63/AN3
7
CNVSS
6
18
P54/CNTR0
RESET
63
P55/CNTR1
RESET
P64/AN4
5
P41/INT00/XCIN
19
4
20
62
P57/INT3
61
P65/AN5
P56/PWM
P66/AN6
3
P40/INT40/XCOUT
P60/AN0
XIN
21
2
22
60
1
59
P61/AN1
AVSS
P67/AN7
P62/AN2
VCC
48
3804 Group (Spec.L)
*Connect oscillation circuit.
RxD
indicates flash memory pin.
TxD
“L” input
BUSY
Package code: PLQP0064KB-A (64P6Q-A) / PLQP0064GA-A (64P6U-A)
Fig. 92 Connection for standard serial I/O mode 2 (M38049FFLHP/KP)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 98 of 128
3804 Group (Spec.L)
VCC
BUSY
SCLK
TXD
RXD
CNVSS
RESET
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
M38049FFLSP
VCC
VREF
AVSS
P67/AN7
P66/AN6
P65/AN5
P64/AN4
P63/AN3
P62/AN2
P61/AN1
P60/AN0
P57/INT3
P56/PWM
P55/CNTR1
P54/CNTR0
P53/SRDY2
P52/SCLK2
P51/SOUT2
P50/SIN2
P47/SRDY1/CNTR2
P46/SCLK1
P45/TXD1
P44/RXD1
P43/INT2
P42/INT1
CNVSS
RESET
P41/INT00/XCIN
P40/INT40/XCOUT
XIN
*
XOUT
VSS
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
Package code: PRDP0064BA-A (64P4B)
*Connect oscillation circuit.
indicates flash memory pin.
Fig. 93 Connection for standard serial I/O mode 1 (M38049FFLSP)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 99 of 128
P30/DA1
P31/DA2
P32/SDA
P33/SCL
P34/RXD3
P35/TXD3
P36/SCLK3
P37/SRDY3
P00/AN8
P01/AN9
P02/AN10
P03/AN11
P04/AN12
P05/AN13
P06/AN14
P07/AN15
P10/INT41
P11/INT01
P12
P13
P14
P15
P16
P17
P20(LED0)
P21(LED1)
P22(LED2)
P23(LED3)
P24(LED4)
P25(LED5)
P26(LED6)
P27(LED7)
3804 Group (Spec.L)
VCC
BUSY
“L” input
TXD
RXD
CNVSS
RESET
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
M38049FFLSP
VCC
VREF
AVSS
P67/AN7
P66/AN6
P65/AN5
P64/AN4
P63/AN3
P62/AN2
P61/AN1
P60/AN0
P57/INT3
P56/PWM
P55/CNTR1
P54/CNTR0
P53/SRDY2
P52/SCLK2
P51/SOUT2
P50/SIN2
P47/SRDY1/CNTR2
P46/SCLK1
P45/TXD1
P44/RXD1
P43/INT2
P42/INT1
CNVSS
RESET
P41/INT00/XCIN
P40/INT40/XCOUT
XIN
*
XOUT
VSS
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
Package code: PRDP0064BA-A (64P4B)
*Connect oscillation circuit.
indicates flash memory pin.
Fig. 94 Connection for standard serial I/O mode 2 (M38049FFLSP)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 100 of 128
P30/DA1
P31/DA2
P32/SDA
P33/SCL
P34/RXD3
P35/TXD3
P36/SCLK3
P37/SRDY3
P00/AN8
P01/AN9
P02/AN10
P03/AN11
P04/AN12
P05/AN13
P06/AN14
P07/AN15
P10/INT41
P11/INT01
P12
P13
P14
P15
P16
P17
P20(LED0)
P21(LED1)
P22(LED2)
P23(LED3)
P24(LED4)
P25(LED5)
P26(LED6)
P27(LED7)
3804 Group (Spec.L)
PIN CONFIGURATION (TOP VIEW)
8
7
6
A
B
C
D
E
F
G
H
50
46
44
41
40
32
31
30
P36/SCLK3
P02/AN10
P04/AN12
P07/AN15
P10/INT41
P20(LED0)
P21(LED1)
P22(LED2)
51
47
45
42
39
27
29
28
P35/TXD3
P01/AN9
P03/AN11
P06/AN14
P11/INT01
P25(LED5)
P23(LED3)
P24(LED4)
53
52
48
43
38
37
26
25
P33/SCL
P34/RXD3
P00/AN8
P05/AN13
P12
P13
P26(LED6)
P27(LED7)
8
7
6
VSS
5
56
55
54
49
33
36
35
34
P30/DA1
P31/DA2
P32/SDA
P37/SRDY3
P17
P14
P15
P16
5
*
4
1
64
58
59
57
24
22
23
P62/AN2
P63/AN3
VREF
AVSS
VCC
VSS
XIN
XOUT
4
BUSY
VCC
3
60
61
4
7
P67/AN7
P66/AN6
P57/INT3
P54/CNTR0
12
62
63
5
8
10
13
17
19
P65/AN5
P64/AN4
P56/PWM
P53/SRDY2
P51/SOUT2
P46/SCLK1
P42/INT1
RESET
2
3
6
9
11
15
16
18
P61/AN1
P60/AN0
P55/CNTR1
P52/SCLK2
P50/SIN2
P44/RXD1
P43/INT2
CNVSS
A
B
C
D
E
F
G
H
P47/SRDY1/CNTR2
14
P45/TXD1
21
P40/INT40/XCOUT
20
3
P41/INT00/XCIN
TXD
2
RESET
2
SCLK
1
RXD
* Connect oscillation circuit.
Package code: PTLG0064JA-A (64F0G)
indicates flash memory pin.
Fig. 95 Connection for standard serial I/O mode 1 (M38049FFLWG)
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CNVSS
1
3804 Group (Spec.L)
PIN CONFIGURATION (TOP VIEW)
8
7
6
A
B
C
D
E
F
G
H
50
46
44
41
40
32
31
30
P36/SCLK3
P02/AN10
P04/AN12
P07/AN15
P10/INT41
P20(LED0)
P21(LED1)
P22(LED2)
51
47
45
42
39
27
29
28
P35/TXD3
P01/AN9
P03/AN11
P06/AN14
P11/INT01
P25(LED5)
P23(LED3)
P24(LED4)
53
52
48
43
38
37
26
25
P33/SCL
P34/RXD3
P00/AN8
P05/AN13
P12
P13
P26(LED6)
P27(LED7)
8
7
6
VSS
5
56
55
54
49
33
36
35
34
P30/DA1
P31/DA2
P32/SDA
P37/SRDY3
P17
P14
P15
P16
5
*
4
1
64
58
59
57
24
22
23
P62/AN2
P63/AN3
VREF
AVSS
VCC
VSS
XIN
XOUT
4
BUSY
VCC
3
60
61
4
7
P67/AN7
P66/AN6
P57/INT3
P54/CNTR0
12
62
63
5
8
10
13
17
19
P65/AN5
P64/AN4
P56/PWM
P53/SRDY2
P51/SOUT2
P46/SCLK1
P42/INT1
RESET
2
3
6
9
11
15
16
18
P61/AN1
P60/AN0
P55/CNTR1
P52/SCLK2
P50/SIN2
P44/RXD1
P43/INT2
CNVSS
A
B
C
D
E
F
G
H
P47/SRDY1/CNTR2
14
P45/TXD1
21
P40/INT40/XCOUT
20
3
P41/INT00/XCIN
TXD
2
RESET
2
“L”input
1
RXD
Package code: PTLG0064JA-A (64F0G)
* Connect oscillation circuit.
indicates flash memory pin.
Fig. 96 Connection for standard serial I/O mode 2 (M38049FFLWG)
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Page 102 of 128
CNVSS
1
3804 Group (Spec.L)
td(CNVSS-RESET)
td(P45-RESET)
Power source
RESET
CNVSS
P45(TXD)
P46(SCLK)
P47(BUSY)
P44(RXD)
Symbol
Limits
Min.
Typ.
Max.
td(CNVSS-RESET)
0
−
−
td(P45-RESET)
0
Unit
ms
Notes: In the standard serial I/O mode 1, input “H” to the P46 pin.
Be sure to set the CNVSS pin to “H” before rising RESET.
Be sure to set the P45 pin to “H” before rising RESET.
ms
Fig. 97 Operating waveform for standard serial I/O mode 1
td(CNVSS-RESET)
td(P45-RESET)
Power source
RESET
CNVSS
P45(TXD)
P46(SCLK)
P47(BUSY)
P44(RXD)
Symbol
Limits
Min.
Typ.
Max.
td(CNVSS-RESET)
0
−
−
td(P45-RESET)
0
Unit
ms
Notes: In the standard serial I/O mode 2, input “H” to the P46 pin.
Be sure to set the CNVSS pin to “H” before rising RESET.
Be sure to set the P45 pin to “H” before rising RESET.
ms
Fig. 98 Operating waveform for standard serial I/O mode 2
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3804 Group (Spec.L)
3804 Group (Spec. L)
T_VDD
VCC
T_VPP
N.C.
4.7kΩ
T_RXD
P45 (TXD)
T_TXD
P44 (RXD)
T_SCLK
P46 (SCLK)
T_PGM/OE/MD
CNVSS
4.7kΩ
T_BUSY
P47 (BUSY)
RESET circuit
RESET
T_RESET
GND
VSS
AVSS
XIN
XOUT
Set the same termination as the
single-chip mode.
Note: For the programming circuit, the wiring capacity of each signal pin must not exceed 47 pF.
Fig. 99 When using programmer (in standard serial I/O mode 1) of Suisei Electronics System Co., LTD,
connection example
Rev.1.00 Oct 27, 2008
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Page 104 of 128
3804 Group (Spec.L)
3804 Group (Spec. L)
VCC
VCC
CNVSS
4.7 kΩ
4.7 kΩ
4.7 kΩ
P45 (TXD)
P44 (RXD)
P46 (SCLK)
P47 (BUSY)
14
13
12
11
10
9
8
7
6
5
4
3
2
1
RESET
circuit
*1
RESET
VSS
AVSS
XIN
XOUT
Set the same termination as the
single-chip mode.
*1 : Open-collector buffer
Note : For the programming circuit, the wiring capacity of each signal pin must not exceed 47 pF.
Fig. 100 When using E8 programmer (in standard serial I/O mode 1), connection example
Rev.1.00 Oct 27, 2008
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3804 Group (Spec.L)
NOTES
NOTES ON PROGRAMMING
1. Processor Status Register
(1) Initializing of processor status register
Flags which affect program execution must be initialized after a reset.
In particular, it is essential to initialize the T and D flags because
they have an important effect on calculations.
<Reason>
After a reset, the contents of the processor status register (PS) are
undefined except for the I flag which is “1”.
Set D flag to “1”
ADC or SBC instruction
NOP instruction
SEC, CLC, or CLD instruction
Reset
Fig. 103 Execution of decimal calculations
Initializing of flags
Main program
Fig. 101 Initialization of processor status register
(2) How to reference the processor status register
To reference the contents of the processor status register (PS),
execute the PHP instruction once then read the contents of (S+1).
If necessary, execute the PLP instruction to return the PS to its
original status.
(S)
(S) + 1
Stored PS
Fig. 102 Stack memory contents after PHP instruction
execution
2. Decimal calculations
(1) Execution of decimal calculations
The ADC and SBC are the only instructions which will yield
proper decimal notation, set the decimal mode flag (D) to “1”
with the SED instruction. After executing the ADC or SBC
instruction, execute another instruction before executing the
SEC, CLC, or CLD instruction.
(2) Notes on status flag in decimal mode
When decimal mode is selected, the values of three of the flags in
the status register (the N, V, and Z flags) are invalid after a ADC
or SBC instruction is executed.
The carry flag (C) is set to “1” if a carry is generated as a result of the
calculation, or is cleared to “0” if a borrow is generated. To
determine whether a calculation has generated a carry, the C flag
must be initialized to “0” before each calculation. To check for a
borrow, the C flag must be initialized to “1” before each calculation.
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3. JMP instruction
When using the JMP instruction in indirect addressing mode, do
not specify the last address on a page as an indirect address.
4. Multiplication and Division Instructions
• The index X mode (T) and the decimal mode (D) flags do not
affect the MUL and DIV instruction.
• The execution of these instructions does not change the
contents of the processor status register.
5. Ports
The contents of the port direction registers cannot be read. The
following cannot be used:
• The data transfer instruction (LDA, etc.)
• The operation instruction when the index X mode flag (T) is “1”
• The instruction with the addressing mode which uses the value
of a direction register as an index
• The bit-test instruction (BBC or BBS, etc.) to a direction
register
• The read-modify-write instructions (ROR, CLB, or SEB, etc.)
to a direction register.
Use instructions such as LDM and STA, etc., to set the port
direction registers.
6. Instruction Execution Timing
The instruction execution time can be obtained by multiplying
the frequency of the internal clock φ by the number of cycles
mentioned in the 740 Family Software Manual.
The frequency of the internal clock φ is the twice the XIN cycle in
high-speed mode, 8 times the XIN cycle in middle-speed mode,
and the twice the XCIN in low-speed mode.
3804 Group (Spec.L)
Countermeasures against noise
(1) Shortest wiring length
1. Wiring for RESET pin
Make the length of wiring which is connected to the RESET
pin as short as possible. Especially, connect a capacitor across
the RESET pin and the VSS pin with the shortest possible
wiring (within 20mm).
<Reason>
The width of a pulse input into the RESET pin is determined by
the timing necessary conditions. If noise having a shorter pulse
width than the standard is input to the RESET pin, the reset is
released before the internal state of the microcomputer is completely initialized. This may cause a program runaway.
Noise
Reset
circuit
VSS
N.G.
Reset
circuit
VSS
XIN
XOUT
VSS
N.G.
XIN
XOUT
VSS
O.K.
Fig. 105 Wiring for clock I/O pins
RESET
VSS
Noise
RESET
(2) Connection of bypass capacitor across VSS line and VCC line
In order to stabilize the system operation and avoid the latch-up,
connect an approximately 0.1 μF bypass capacitor across the VSS
line and the VCC line as follows:
• Connect a bypass capacitor across the VSS pin and the VCC pin
at equal length.
• Connect a bypass capacitor across the VSS pin and the VCC pin
with the shortest possible wiring.
• Use lines with a larger diameter than other signal lines for VSS
line and VCC line.
• Connect the power source wiring via a bypass capacitor to the
VSS pin and the VCC pin.
VSS
O.K.
VCC
VCC
VSS
VSS
Fig. 104 Wiring for the RESET pin
2. Wiring for clock input/output pins
• Make the length of wiring which is connected to clock I/O
pins as short as possible.
• Make the length of wiring (within 20 mm) across the
grounding lead of a capacitor which is connected to an
oscillator and the VSS pin of a microcomputer as short as
possible.
• Separate the VSS pattern only for oscillation from other VSS
patterns.
<Reason>
If noise enters clock I/O pins, clock waveforms may be
deformed. This may cause a program failure or program
runaway. Also, if a potential difference is caused by the noise
between the VSS level of a microcomputer and the VSS level of
an oscillator, the correct clock will not be input in the
microcomputer.
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N.G.
O.K.
Fig. 106 Bypass capacitor across the VSS line and the
VCC line
3804 Group (Spec.L)
(3) Oscillator concerns
In order to obtain the stabilized operation clock on the user
system and its condition, contact the oscillator manufacturer and
select the oscillator and oscillation circuit constants. Be careful
especially when range of voltage and temperature is wide.
Also, take care to prevent an oscillator that generates clocks for a
microcomputer operation from being affected by other signals.
1. Keeping oscillator away from large current signal lines
Install a microcomputer (and especially an oscillator) as far as
possible from signal lines where a current larger than the tolerance of current value flows.
<Reason>
In the system using a microcomputer, there are signal lines for
controlling motors, LEDs, and thermal heads or others. When a
large current flows through those signal lines, strong noise
occurs because of mutual inductance.
2. Installing oscillator away from signal lines where potential
levels change frequently
Install an oscillator and a connecting pattern of an oscillator
away from signal lines where potential levels change frequently. Also, do not cross such signal lines over the clock
lines or the signal lines which are sensitive to noise.
<Reason>
Signal lines where potential levels change frequently (such as the
CNTR pin signal line) may affect other lines at signal rising edge
or falling edge. If such lines cross over a clock line, clock waveforms may be deformed, which causes a microcomputer failure
or a program runaway.
(4) Analog input
The analog input pin is connected to the capacitor of a voltage
comparator. Accordingly, sufficient accuracy may not be
obtained by the charge/discharge current at the time of A/D
conversion when the analog signal source of high-impedance is
connected to an analog input pin. In order to obtain the A/D
conversion result stabilized more, please lower the impedance of
an analog signal source, or add the smoothing capacitor to an
analog input pin.
(5) Difference of memory size
When memory size differ in one group, actual values such as an
electrical characteristics, A/D conversion accuracy, and the
amount of proof of noise incorrect operation may differ from the
ideal values. When these products are used switching, perform
system evaluation for each product of every after confirming
product specification.
(6) Wiring to CNVSS pin
The CNVSS pin determines the flash memory mode.
Connect the CNVSS pin the shortest possible to the GND pattern
which is supplied to the VSS pin of the microcomputer.
In addition connecting an approximately 5 kΩ. resistor in series
to the GND could improve noise immunity. In this case as well
as the above mention, connect the pin the shortest possible to the
GND pattern which is supplied to the V S S pin of the
microcomputer.
Note. When the boot mode or the standard serial I/O mode is used, a
switch of the input level to the CNVSS pin is required.
(Note)
1. Keeping oscillator away from large current signal lines
The shortest
CNVSS
Approx. 5kΩ
Microcomputer
Mutual inductance
M
VSS
(Note)
XIN
XOUT
VSS
Large
current
Note: Shows the microcomputer’s pin.
GND
2. Installing oscillator away from signal lines where potential
levels change frequently
Do not cross
CNTR
XIN
XOUT
VSS
N.G.
Fig. 107 Wiring for a large current signal line/Wiring of
signal lines where potential levels change
frequently
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REJ03B0266-0100
The shortest
Page 108 of 128
Fig. 108 Wiring for the CNVSS
3804 Group (Spec.L)
NOTES ON PERIPHERAL FUNCTIONS
Notes on Input and Output Ports
1. Notes in standby state
In standby state*1 for low-power dissipation, do not make input
levels of an I/O port “undefined”. Even when an I/O port of Nchannel open-drain is set as output mode, if output data is “1”,
the aforementioned notes are necessary.
Pull-up (connect the port to VCC) or pull-down (connect the port
to VSS) these ports through a resistor.
When determining a resistance value, note the following points:
• External circuit
• Variation of output levels during the ordinary operation
When using built-in pull-up resistor, note on varied current
values:
• When setting as an input port : Fix its input level
• When setting as an output port : Prevent current from flowing
out to external
<Reason>
Exclusive input ports are always in a high-impedance state. An
output transistor becomes an OFF state when an I/O port is set as
input mode by the direction register, so that the port enter a highimpedance state. At this time, the potential which is input to the
input buffer in a microcomputer is unstable in the state that input
levels are “undefined”. This may cause power source current.
Even when an I/O port of N-channel open-drain is set as output
mode by the direction register, if the contents of the port latch is
“1”, the same phenomenon as that of an input port will occur.
*1
Standby state :
stop mode by executing STP instruction
wait mode by executing WIT instruction
2. Modifying output data with bit managing instruction
When the port latch of an I/O port is modified with the bit
managing instruction*1, the value of the unspecified bit may be
changed.
<Reason>
I/O ports are set to input or output mode in bit units. Reading
from a port register or writing to it involves the following
operations.
• Port in input mode
Read: Read the pin level.
Write: Write to the port latch.
• Port in output mode
Read: Read the port latch or read the output from the peripheral
function (specifications differ depending on the port).
Write: Write to the port latch. (The port latch value is output
from the pin.)
Since bit managing instructions *1 are read-modify-write
instructions,*2 using such an instruction on a port register causes
a read and write to be performed simultaneously on the bits other
than the one specified by the instruction.
When an unspecified bit is in input mode, its pin level is read and
that value is written to the port latch. If the previous value of the
port latch differs from the pin level, the port latch value is changed.
If an unspecified bit is in output mode, the port latch is generally
read. However, for some ports the peripheral function output is
read, and the value is written to the port latch. In this case, if the
previous value of the port latch differs from the peripheral
function output, the port latch value is changed.
*1 Bit
managing instructions: SEB and CLB instructions
*2 Read-modify-write instructions: Instructions that read memory
in byte units, modify the value, and then write the result to the
same location in memory in byte units
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Termination of Unused Pins
1. Terminate unused pins
(1) Output ports : Open
(2) I/O ports :
• Set the I/O ports for the input mode and connect them to VCC
or VSS through each resistor of 1 kΩ to 10 kΩ.
Ports that permit the selecting of a built-in pull-up resistor can
also use this resistor. Set the I/O ports for the output mode and
open them at “L” or “H”.
• When opening them in the output mode, the input mode of the
initial status remains until the mode of the ports is switched
over to the output mode by the program after reset. Thus, the
potential at these pins is undefined and the power source
current may increase in the input mode. With regard to an
effects on the system, thoroughly perform system evaluation
on the user side.
• Since the direction register setup may be changed because of a
program runaway or noise, set direction registers by program
periodically to increase the reliability of program.
(3) The AVSS pin when not using the A/D converter :
• When not using the A/D converter, handle a power source pin
for the A/D converter, AVSS pin as follows:
AVSS: Connect to the VSS pin.
2. Termination remarks
(1) I/O ports :
Do not open in the input mode.
<Reason>
• The power source current may increase depending on the firststage circuit.
• An effect due to noise may be easily produced as compared
with proper termination (2) in 1 and shown on the above.
(2) I/O ports :
When setting for the input mode, do not connect to VCC or VSS
directly.
<Reason>
If the direction register setup changes for the output mode
because of a program runaway or noise, a short circuit may occur
between a port and VCC (or VSS).
(3) I/O ports :
When setting for the input mode, do not connect multiple ports in
a lump to VCC or VSS through a resistor.
<Reason>
If the direction register setup changes for the output mode
because of a program runaway or noise, a short circuit may occur
between ports.
• At the termination of unused pins, perform wiring at the
shortest possible distance (20 mm or less) from microcomputer pins.
3804 Group (Spec.L)
Notes on Interrupts
1. Change of relevant register settings
When the setting of the following registers or bits is changed, the
interrupt request bit may be set to “1”. When not requiring the
interrupt occurrence synchronized with these setting, take the
following sequence.
• Interrupt edge selection register (address 003A16)
• Timer XY mode register (address 002316)
• Timer Z mode register (address 002A16)
Set the above listed registers or bits as the following sequence.
2. Check of interrupt request bit
When executing the BBC or BBS instruction to an interrupt
request bit of an interrupt request register immediately after this
bit is set to “0”, execute one or more instructions before
executing the BBC or BBS instruction.
Clear the interrupt request bit to “0” (no interrupt issued)
NOP (one or more instructions)
Set the corresponding interrupt enable bit to “0” (disabled).
Set the interrupt edge select bit (active edge switch bit)
or the interrupt (source) select bit to “1”.
NOP (one or more instructions)
Set the corresponding interrupt request bit to “0”
(no interrupt request issued).
Set the corresponding interrupt enable bit to “1” (enabled).
Fig. 109 Sequence of changing relevant register
<Reason>
When setting the followings, the interrupt request bit may be set
to “1”.
• When setting external interrupt active edge
Concerned register: Interrupt edge selection register
(address 003A16)
Timer XY mode register (address 002316)
Timer Z mode register (address 002A16)
• When switching interrupt sources of an interrupt vector
address where two or more interrupt sources are allocated.
Concerned register: Interrupt source selection register
(address 003916)
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Execute the BBC or BBS instruction
Fig. 110 Sequence of check of interrupt request bit
<Reason>
If the BBC or BBS instruction is executed immediately after an
interrupt request bit of an interrupt request register is cleared to
“0”, the value of the interrupt request bit before being cleared to
“0” is read.
3804 Group (Spec.L)
Notes on 8-bit Timer (timer 1, 2, X, Y)
• If a value n (between 0 and 255) is written to a timer latch, the
frequency division ratio is 1/(n+1).
• When switching the count source by the timer 12, X and Y
count source selection bits, the value of timer count is altered
in unconsiderable amount owing to generating of thin pulses in
the count input signals.
Therefore, select the timer count source before set the value to
the prescaler and the timer.
• Set the double-function port of the CNTR0/CNTR1 pin and
port P54/P55 to output in the pulse output mode.
• Set the double-function port of CNTR0/CNTR1 pin and port
P54/P55 to input in the event counter mode and the pulse width
measurement mode.
Notes on 16-bit Timer (timer Z)
1. Pulse output mode
• Set the double-function port of the CNTR2 pin and port P47 to
output.
2. Pulse period measurement mode
• Set the double-function port of the CNTR2 pin and port P47 to
input.
• A read-out of timer value is impossible in this mode. The timer
can be written to only during timer stop (no measurement of
pulse period).
• Since the timer latch in this mode is specialized for the readout of measured values, do not perform any write operation
during measurement.
• “FFFF16” is set to the timer when the timer underflows or
when the valid edge of measurement start/completion is
detected.
Consequently, the timer value at start of pulse period
measurement depends on the timer value just before
measurement start.
3. Pulse width measurement mode
• Set the double-function port of the CNTR2 pin and port P47 to
input.
• A read-out of timer value is impossible in this mode. The timer
can be written to only during timer stop (no measurement of
pulse period).
• Since the timer latch in this mode is specialized for the readout of measured values, do not perform any write operation
during measurement.
• “FFFF16” is set to the timer when the timer underflows or
when the valid edge of measurement start/completion is
detected.
Consequently, the timer value at start of pulse width
measurement depends on the timer value just before
measurement start.
4. Programmable waveform generating mode
• Set the double-function port of the CNTR2 pin and port P47 to
output.
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REJ03B0266-0100
Page 111 of 128
5. Programmable one-shot generating mode
• Set the double-function port of CNTR2 pin and port P47 to
output, and of INT1 pin and port P42 to input in this mode.
• This mode cannot be used in low-speed mode.
• If the value of the CNTR2 active edge switch bit is changed
during one-shot generating enabled or generating one-shot
pulse, then the output level from CNTR2 pin changes.
6. All modes
• Timer Z write control
Which write control can be selected by the timer Z write control
bit (bit 3) of the timer Z mode register (address 002A16), writing
data to both the latch and the timer at the same time or writing
data only to the latch.
When the operation “writing data only to the latch” is selected,
the value is set to the timer latch by writing data to the address of
timer Z and the timer is updated at next underflow. After reset
release, the operation “writing data to both the latch and the timer
at the same time” is selected, and the value is set to both the latch
and the timer at the same time by writing data to the address of
timer Z.
In the case of writing data only to the latch, if writing data to the
latch and an underflow are performed almost at the same time,
the timer value may become undefined.
• Timer Z read control
A read-out of timer value is impossible in pulse period
measurement mode and pulse width measurement mode. In the
other modes, a read-out of timer value is possible regardless of
count operating or stopped.
However, a read-out of timer latch value is impossible.
• Switch of interrupt active edge of CNTR2 and INT1
Each interrupt active edge depends on setting of the CNTR2
active edge switch bit and the INT1 active edge selection bit.
• Switch of count source
When switching the count source by the timer Z count source
selection bits, the value of timer count is altered in
inconsiderable amount owing to generating of thin pulses on the
count input signals.
Therefore, select the timer count source before setting the value
to the prescaler and the timer.
3804 Group (Spec.L)
Notes on Serial Interface
1. Notes when selecting clock synchronous serial I/O
(1) Stop of transmission operation
As for serial I/Oi (i = 1, 3) that can be used as either a clock
synchronous or an asynchronous (UART) serial I/O, clear the
serial I/Oi enable bit and the transmit enable bit to “0” (serial
I/Oi and transmit disabled).
<Reason>
Since transmission is not stopped and the transmission circuit is
not initialized even if only the serial I/Oi enable bit is cleared to
“0” (serial I/Oi disabled), the internal transmission is running (in
this case, since pins TxDi, RxDi, SCLKi, and SRDYi function as
I/O ports, the transmission data is not output). When data is
written to the transmit buffer register in this state, data starts to
be shifted to the transmit shift register. When the serial I/Oi
enable bit is set to “1” at this time, the data during internally
shifting is output to the TxDi pin and an operation failure occurs.
(2) Stop of receive operation
As for serial I/Oi (i = 1, 3) that can be used as either a clock
synchronous or an asynchronous (UART) serial I/O, clear the
receive enable bit to “0” (receive disabled), or clear the serial
I/Oi enable bit to “0” (serial I/Oi disabled).
(3) Stop of transmit/receive operation
As for serial I/Oi (i = 1, 3) that can be used as either a clock
synchronous or an asynchronous (UART) serial I/O, clear both
the transmit enable bit and receive enable bit to “0” (transmit and
receive disabled).
(when data is transmitted and received in the clock synchronous
serial I/O mode, any one of data transmission and reception
cannot be stopped.)
<Reason>
In the clock synchronous serial I/O mode, the same clock is used
for transmission and reception. If any one of transmission and
reception is disabled, a bit error occurs because transmission and
reception cannot be synchronized.
In this mode, the clock circuit of the transmission circuit also
operates for data reception. Accordingly, the transmission circuit
does not stop by clearing only the transmit enable bit to “0”
(transmit disabled). Also, the transmission circuit is not
initialized by clearing the serial I/Oi enable bit to “0” (serial I/Oi
disabled) (refer to (1) in 1.).
2. Notes when selecting clock asynchronous serial I/O
(1) Stop of transmission operation
Clear the transmit enable bit to “0” (transmit disabled). The
transmission operation does not stop by clearing the serial I/Oi
enable bit (i = 1, 3) to “0”.
<Reason>
This is the same as (1) in 1.
(2) Stop of receive operation
Clear the receive enable bit to “0” (receive disabled).
(3) Stop of transmit/receive operation
Only transmission operation is stopped.
Clear the transmit enable bit to “0” (transmit disabled). The
transmission operation does not stop by clearing the serial I/Oi
enable bit (i = 1, 3) to “0”.
<Reason>
This is the same as (1) in 1.
Only receive operation is stopped.
Clear the receive enable bit to “0” (receive disabled).
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 112 of 128
3. SRDYi (i = 1, 3) output of reception side
When signals are output from the SRDYi pin on the reception side
by using an external clock in the clock synchronous serial I/O
mode, set all of the receive enable bit, the SRDYi output enable
bit, and the transmit enable bit to “1” (transmit enabled).
4. Setting serial I/Oi (i = 1, 3) control register again
Set the serial I/Oi control register again after the transmission
and the reception circuits are reset by clearing both the transmit
enable bit and the receive enable bit to “0”.
Clear both the transmit enable bit (TE) and
the receive enable bit (RE) to “0”
Set the bits 0 to 3 and bit 6 of the serial I/Oi
control register
Set both the transmit enable bit (TE) and the
receive enable bit (RE), or one of them to “1”
Can be set with the
LDM instruction at
the same time
Fig. 111 Sequence of setting serial I/Oi (i = 1, 3)
control register again
5. Data transmission control with referring to transmit
shift register completion flag
After the transmit data is written to the transmit buffer register,
the transmit shift register completion flag changes from “1” to
“0” with a delay of 0.5 to 1.5 shift clocks. When data
transmission is controlled with referring to the flag after writing
the data to the transmit buffer register, note the delay.
6. Transmission control when external clock is selected
When an external clock is used as the synchronous clock for data
transmission, set the transmit enable bit to “1” at “H” of the
SCLKi (i = 1, 3) input level. Also, write the transmit data to the
transmit buffer register at “H” of the SCLKi input level.
7. Transmit interrupt request when transmit enable bit
is set
When using the transmit interrupt, take the following sequence.
(1) Set the serial I/Oi transmit interrupt enable bit (i = 1, 3) to
“0” (disabled).
(2) Set the transmit enable bit to “1”.
(3) Set the serial I/Oi transmit interrupt request bit (i = 1, 3) to
“0” after 1 or more instruction has executed.
(4) Set the serial I/Oi transmit interrupt enable bit (i = 1, 3) to
“1” (enabled).
<Reason>
When the transmission enable bit is set to “1”, the transmit buffer
empty flag and transmit shift register shift completion flag are
also set to “1”.
Therefore, regardless of selecting which timing for the
generating of transmit interrupts, the interrupt request is
generated and the transmit interrupt request bit is set at this point.
8. Writing to baud rate generator i (BRGi) (i = 1, 3)
Write data to the baud rate generator i (BRGi) (i = 1, 3) while the
transmission/reception operation is stopped.
3804 Group (Spec.L)
Notes on PWM
The PWM starts from “H” level after the PWM enable bit is set
to enable and “L” level is temporarily output from the PWM pin.
The length of this “L” level output is as follows:
n+1
2 × f(XIN)
(s)
(Count source selection bit = “0”,
where n is the value set in the prescaler)
n+1
f(XIN)
(s)
(Count source selection bit = “1”,
where n is the value set in the prescaler)
Notes on A/D Converter
1. Analog input pin
Make the signal source impedance for analog input low, or equip
an analog input pin with an external capacitor of 0.01 μF to 1 μF.
Further, be sure to verify the operation of application products on
the user side.
<Reason>
An analog input pin includes the capacitor for analog voltage
comparison. Accordingly, when signals from signal source with
high impedance are input to an analog input pin, charge and
discharge noise generates. This may cause the A/D conversion
precision to be worse.
Notes on Watchdog Timer
• Make sure that the watchdog timer H does not underflow
while waiting Stop release, because the watchdog timer keeps
counting during that term.
• When the STP instruction disable bit has been set to “1”, it is
impossible to switch it to “0” by a program.
Notes on RESET Pin
Connecting capacitor
In case where the RESET signal rise time is long, connect a
ceramic capacitor or others across the RESET pin and the VSS
pin.
Use a 1000 pF or more capacitor for high frequency use. When
connecting the capacitor, note the following :
• Make the length of the wiring which is connected to a
capacitor as short as possible.
• Be sure to verify the operation of application products on the
user side.
<Reason>
If the several nanosecond or several ten nanosecond impulse
noise enters the RESET pin, it may cause a microcomputer
failure.
Notes on Low-speed Operation Mode
2. A/D converter power source pin
The AVSS pin is A/D converter power source pins. Regardless of
using the A/D conversion function or not, connect it as following :
• AVSS : Connect to the VSS line
<Reason>
If the AVSS pin is opened, the microcomputer may have a failure
because of noise or others.
3. Clock frequency during A/D conversion
The comparator consists of a capacity coupling, and a charge of
the capacity will be lost if the clock frequency is too low. Thus,
make sure the following during an A/D conversion.
• f(XIN) is 500 kHz or more
• Do not execute the STP instruction
4. Difference between at 8-bit reading in 10-bit A/D
mode and at 8-bit A/D mode
At 8-bit reading in the 10-bit A/D mode, “–1/2 LSB” correction
is not performed to the A/D conversion result.
In the 8-bit A/D mode, the A/D conversion characteristics is the
same as 3802 group’s characteristics because “–1/2 LSB”
correction is performed.
Notes on D/A Converter
1. VCC when using D/A converter
The D/A converter accuracy when VCC is 4.0 V or less differs
from that of when VCC is 4.0 V or more. When using the D/A
converter, we recommend using a VCC of 4.0 V or more.
2. DAi conversion register when not using D/A converter
When a D/A converter is not used, set all values of the DAi
conversion registers (i = 1, 2) to “0016”. The initial value after
reset is “0016”.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 113 of 128
1. Using sub-clock
To use a sub-clock, fix bit 3 of the CPU mode register to “1” or
control the Rd (refer to Figure 112) resistance value to a certain
level to stabilize an oscillation. For resistance value of Rd,
consult the oscillator manufacturer.
XCIN
XCOUT
Rf
Rd
CCIN
CCOUT
Fig. 112 Ceramic resonator circuit
<Reason>
When bit 3 of the CPU mode register is set to “0”, the sub-clock
oscillation may stop.
2. Switch between middle/high-speed mode and lowspeed mode
If you switch the mode between middle/high-speed and lowspeed, stabilize both XIN and XCIN oscillations. The sufficient
time is required for the sub clock to stabilize, especially
immediately after power on and at returning from stop mode.
When switching the mode between middle/high-speed and lowspeed, set the frequency on condition that f(XIN) > 3 × f(XCIN).
Quartz-Crystal Oscillator
When using the quartz-crystal oscillator of high frequency, such
as 16 MHz etc., it may be necessary to select a specific oscillator
with the specification demanded.
3804 Group (Spec.L)
Notes on Restarting Oscillation
• Restarting oscillation
Usually, when the MCU stops the clock oscillation by STP
instruction and the STP instruction has been released by an
external interrupt source, the fixed values of Timer 1 and
Prescaler 12 (Timer 1 = “0116 ”, Prescaler 12 = “FF 16 ”) are
automatically reloaded in order for the oscillation to stabilize.
The user can inhibit the automatic setting by writing “1” to bit 0
of MISRG (address 001016).
However, by setting this bit to “1”, the previous values, set just
before the STP instruction was executed, will remain in Timer 1
and Prescaler 12. Therefore, you will need to set an appropriate
value to each register, in accordance with the oscillation
stabilizing time, before executing the STP instruction.
<Reason>
Oscillation will restart when an external interrupt is received.
However, internal clock φ is supplied to the CPU only when
Timer 1 starts to underflow. This ensures time for the clock
oscillation using the ceramic resonators to be stabilized.
Notes on Using Stop Mode
• Register setting
Since values of the prescaler 12 and Timer 1 are automatically
reloaded when returning from the stop mode, set them again,
respectively. (When the oscillation stabilizing time set after STP
instruction released bit is “0”)
• Clock restoration
After restoration from the stop mode to the normal mode by an
interrupt request, the contents of the CPU mode register previous
to the STP instruction execution are retained. Accordingly, if
both main clock and sub clock were oscillating before execution
of the STP instruction, the oscillation of both clocks is resumed
at restoration.
In the above case, when the main clock side is set as a system
clock, the oscillation stabilizing time for approximately 8,000
cycles of the XIN input is reserved at restoration from the stop
mode. At this time, note that the oscillation on the sub clock side
may not be stabilized even after the lapse of the oscillation
stabilizing time of the main clock side.
Notes on Wait Mode
• Clock restoration
If the wait mode is released by a reset when XCIN is set as the
system clock and XIN oscillation is stopped during execution of
the WIT instruction, XCIN oscillation stops, XIN oscillations
starts, and XIN is set as the system clock.
In the above case, the RESET pin should be held at “L” until the
oscillation is stabilized.
Notes on CPU rewrite mode of flash memory version
1. Operation speed
During CPU rewrite mode, set the system clock φ 4.0 MHz or
less using the main clock division ratio selection bits (bits 6 and
7 of address 003B16).
2. Instructions inhibited against use
The instructions which refer to the internal data of the flash
memory cannot be used during the CPU rewrite mode.
3. Interrupts inhibited against use
The interrupts cannot be used during the CPU rewrite mode
because they refer to the internal data of the flash memory.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 114 of 128
4. Watchdog timer
In case of the watchdog timer has been running already, the
internal reset generated by watchdog timer underflow does not
happen, because of watchdog timer is always clearing during
program or erase operation.
5. Reset
Reset is always valid. In case of CNVSS = “H” when reset is
released, boot mode is active. So the program starts from the
address contained in address FFFC16 and FFFD16 in boot ROM
area.
Notes on flash memory version
The CNVSS pin determines the flash memory mode.
Connect the CNVSS pin the shortest possible to the GND pattern
which is supplied to the VSS pin of the microcomputer.
In addition connecting an approximately 5 kΩ. resistor in series
to the GND could improve noise immunity. In this case as well
as the above mention, connect the pin the shortest possible to the
GND pattern which is supplied to the V S S pin of the
microcomputer.
Note. When the boot mode or the standard serial I/O mode is used, a
switch of the input level to the CNVSS pin is required.
(Note)
The shortest
CNVSS
Approx. 5kΩ
VSS
(Note)
The shortest
Note: Shows the microcomputer’s pin.
Fig. 113 Wiring for the CNVSS
Notes on Handling of Power Source Pins
In order to avoid a latch-up occurrence, connect a capacitor
suitable for high frequencies as bypass capacitor between power
source pin (VCC pin) and GND pin (VSS pin), and between power
source pin (VCC pin) and analog power source input pin (AVSS
pin). Besides, connect the capacitor to as close as possible. For
bypass capacitor which should not be located too far from the
pins to be connected, a ceramic capacitor of 0.01 μF–0.1 μF is
recommended.
Power Source Voltage
When the power source voltage value of a microcomputer is less
than the value which is indicated as the recommended operating
conditions, the microcomputer does not operate normally and
may perform unstable operation.
In a system where the power source voltage drops slowly when
the power source voltage drops or the power supply is turned off,
reset a microcomputer when the power source voltage is less
than the recommended operating conditions and design a system
not to cause errors to the system by this unstable operation.
3804 Group (Spec.L)
ELECTRICAL CHARACTERISTICS
Absolute maximum ratings
Table 22 Absolute maximum ratings
Symbol
VCC
VI
VI
VI
Parameter
Power source voltages
Input voltage
P00-P07, P10-P17, P20-P27,
P30, P31, P34-P37, P40-P47,
P50-P57, P60-P67, VREF
Input voltage
P32, P33
Input voltage
RESET, XIN
VI
VO
Input voltage
Output voltage
VO
Pd
Output voltage
Power dissipation
Topr
Tstg
Operating temperature
Storage temperature
CNVSS
P00-P07, P10-P17, P20-P27,
P30, P31, P34-P37, P40-P47,
P50-P57, P60-P67, XOUT
P32, P33
Ta=25 °C
NOTE:
1. This value is 300 mW except SP package.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Conditions
All voltages are based on VSS.
When an input voltage is
measured, output transistors
are cut off.
Page 115 of 128
Ratings
−0.3 to 6.5
−0.3 to VCC + 0.3
Unit
V
V
−0.3 to 5.8
−0.3 to VCC + 0.3
V
V
−0.3 to VCC + 0.3
−0.3 to VCC + 0.3
V
V
−0.3 to 5.8
V
mW
1000(1)
−20 to 85
−65 to 125
°C
°C
3804 Group (Spec.L)
Recommended operating conditions
Table 23
Symbol
VCC
VSS
VIH
VIH
VIH
VIH
VIH
VIH
VIL
VIL
VIL
VIL
VIL
VIL
f(XIN)
Recommended operating conditions (1)
(VCC = 2.7 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Parameter
Conditions
Power source voltage(1)
When start oscillating(2)
f(XIN) ≤ 8.4 MHz
High-speed mode
f(φ) = f(XIN)/2
f(XIN) ≤ 12.5 MHz
f(XIN) ≤ 16.8 MHz
Middle-speed mode f(XIN) ≤ 12.5 MHz
f(φ) = f(XIN)/8
f(XIN) ≤ 16.8 MHz
Power source voltage
“H” input voltage
P00-P07, P10-P17,
P20-P27, P30, P31,
P34-P37, P40-P47,
P50-P57, P60-P67
“H” input voltage
P32, P33
“H” input voltage (when
I2C-BUS input level is
selected) SDA, SCL
“H” input voltage
(when SMBUS input level
is selected) SDA, SCL
“H” input voltage
RESET, XIN,
CNVSS
“H” input voltage
XCIN
“L” input voltage
P00-P07, P10-P17,
P20-P27, P30-P37,
P40-P47, P50-P57,
P60-P67
“L” input voltage (when
I2C-BUS input level is
selected) SDA, SCL
“L” input voltage
(when SMBUS input level
is selected) SDA, SCL
“L” input voltage
RESET, CNVSS
“L” input voltage
XIN
“L” input voltage
XCIN
Main clock input
High-speed mode
f(φ) = f(XIN)/2
oscillation frequency(3)
Middle-speed mode
f(φ) = f(XIN)/8
Limits
Min.
2.7
Typ.
5.0
Max.
5.5
2.7
4.0
4.5
2.7
4.5
5.0
5.0
5.0
5.0
5.0
0
5.5
5.5
5.5
5.5
5.5
Sub-clock input
oscillation frequency(3, 4)
V
V
V
0.8 VCC
VCC
V
V
0.8 VCC
5.5
V
0.7 VCC
5.5
V
1.4
5.5
V
0.8 VCC
VCC
V
2
VCC
V
0
0.2 VCC
V
0
0.3 VCC
V
0
0.6
V
0
0.2 VCC
V
0.16 VCC
V
0.4
V
2.7 ≤ VCC < 4.0 V
( 9 × V CC – 0.3 ) × 1.05
---------------------------------------------------------3
MHz
4.0 ≤ VCC < 4.5 V
( 24 × V CC – 60 ) × 1.05
----------------------------------------------------------3
MHz
4.5 ≤ VCC ≤ 5.5 V
2.7 ≤ VCC < 4.5 V
16.8
MHz
MHz
4.5 ≤ VCC ≤ 5.5 V
f(XCIN)
Unit
32.768
( 15 × V C C + 39 ) × 1.1
-------------------------------------------------------7
16.8
50
MHz
kHz
NOTES:
1. When using A/D converter, see A/D converter recommended operating conditions.
2. The start voltage and the start time for oscillation depend on the using oscillator, oscillation circuit constant value and operating
temperature range, etc.. Particularly a high-frequency oscillator might require some notes in the low voltage operation.
3. When the oscillation frequency has a duty cycle of 50%.
4. When using the microcomputer in low-speed mode, set the sub-clock input oscillation frequency on condition that f(XCIN) < f(XIN)/3.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 116 of 128
3804 Group (Spec.L)
Table 24 Recommended operating conditions (2)
(VCC = 2.7 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Symbol
Parameter
Limits
Typ.
Unit
ΣIOH(peak)
“H” total peak output current(1)
P00-P07, P10-P17, P20-P27, P30, P31, P34-P37
Max.
−80
ΣIOH(peak)
“H” total peak output current(1)
P40-P47, P50-P57, P60-P67
−80
mA
ΣIOL(peak)
“L” total peak output
current(1)
P00-P07, P10-P17, P30-P37
80
mA
ΣIOL(peak)
“L” total peak output current(1)
P20-P27
80
mA
ΣIOL(peak)
“L” total peak output current(1)
P40-P47, P50-P57, P60-P67
80
mA
ΣIOH(avg)
“H” total average output current(1)
P00-P07, P10-P17, P20-P27, P30, P31, P34-P37
−40
mA
ΣIOH(avg)
“H” total average output current(1)
P40-P47, P50-P57, P60-P67
−40
mA
ΣIOL(avg)
“L” total average output
current(1)
P00-P07, P10-P17, P30-P37
40
mA
ΣIOL(avg)
“L” total average output current(1)
P20-P27
40
mA
ΣIOL(avg)
“L” total average output current(1)
P40-P47, P50-P57, P60-P67
40
mA
IOH(peak)
“H” peak output current(2)
−10
mA
IOL(peak)
“L” peak output current(2)
10
mA
IOL(peak)
“L” peak output current(2)
P00-P07, P10-P17, P20-P27, P30, P31, P34-P37,
P40-P47, P50-P57, P60-P67
P00-P07, P10-P17, P30-P37, P40-P47, P50-P57,
P60-P67
P20-P27
20
mA
P00-P07, P10-P17, P20-P27, P30, P31, P34-P37,
P40-P47, P50-P57, P60-P67
P00-P07, P10-P17, P30-P37, P40-P47, P50-P57,
P60-P67
P20-P27
−5
mA
5
mA
10
mA
IOH(avg)
“H” average output
IOL(avg)
“L” average output current(3)
IOL(avg)
“L” average output current(3)
current(3)
Min.
mA
NOTES:
1. The total output current is the sum of all the currents flowing through all the applicable ports. The total average current is an average
value measured over 100 ms. The total peak current is the peak value of all the currents.
2. The peak output current is the peak current flowing in each port.
3. The average output current IOL(avg), IOH(avg) are average value measured over 100 ms.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 117 of 128
3804 Group (Spec.L)
Electrical characteristics
Table 25 Electrical characteristics (1)
(VCC = 2.7 to 5.5 V, VSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Symbol
VOH
VOL
VOL
VT+ − VT−
VT+ − VT−
VT+ − VT−
IIH
IIH
IIH
IIL
IIL
IIL
IIL
VRAM
Parameter
“H” output voltage(1)
P00-P07, P10-P17, P20-P27, P30, P31,
P34-P37, P40-P47, P50-P57, P60-P67
“L” output voltage
P00-P07, P10-P17, P20-P27, P30-P37,
P40-P47, P50-P57, P60-P67
“L” output voltage
P20-P27
Hysteresis
CNTR0, CNTR1, CNTR2, INT0-INT4
Hysteresis
RxD1, SCLK1, SIN2, SCLK2, RxD3, SCLK3
Hysteresis
RESET
“H” input current
P00-P07, P10-P17, P20-P27, P30-P37,
P40-P47, P50-P57, P60-P67
“H” input current
RESET, CNVSS
“H” input current
XIN
“L” input current
P00-P07, P10-P17, P20-P27, P30-P37,
P40-P47, P50-P57, P60-P67
“L” input current
RESET, CNVSS
“L” input current
XIN
“L” input current (at Pull-up)
P00-P07, P10-P17, P20-P27, P30, P31,
P34-P37, P40-P47, P50-P57, P60-P67
RAM hold voltage
Test conditions
IOH = −10 mA
VCC = 4.0 to 5.5 V
IOH = –1.0 mA
VCC = 2.7 to 5.5 V
IOL = 10 mA
VCC = 4.0 to 5.5 V
IOL = 1.6 mA
VCC = 2.7 to 5.5 V
IOL = 20 mA
VCC = 4.0 to 5.5 V
IOL = 1.6 mA
VCC = 2.7 to 5.5 V
Min.
VCC − 2.0
Limits
Typ.
Unit
V
VCC − 1.0
2.0
V
1.0
2.0
V
0.4
0.4
V
0.5
V
0.5
V
VI = VCC
(Pin floating,
Pull-up transistor “off”)
VI = VCC
VI = VCC
5.0
μA
5.0
μA
μA
4.0
VI = VSS
(Pin floating,
Pull-up transistor “off”)
VI = VSS
−5.0
μA
−5.0
μA
−4.0
VI = VSS
VI = VSS
VCC = 5.0 V
VI = VSS
VCC = 3.0 V
When clock stopped
Max.
μA
−80
−210
−420
−30
−70
−140
1.8
VCC
μA
V
NOTE:
1. P35 is measured when the P35/TXD3 P-channel output disable bit of the UART3 control register (bit 4 of address 003316) is “0”.
P45 is measured when the P45/TXD1 P-channel output disable bit of the UART1 control register (bit 4 of address 001B16) is “0”.
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 118 of 128
3804 Group (Spec.L)
Table 26 Electrical characteristics (2)
(VCC = 2.7 to 5.5 V, Ta = –20 to 85 °C, f(XCIN)=32.768 kHz (Stopped in middle-speed mode),
Output transistors “off”, AD converter not operated)
Symbol
ICC
Parameter
Test conditions
Power source High-speed
current
mode
VCC = 5.0 V
VCC = 3.0 V
Middle-speed
mode
VCC = 5.0 V
VCC = 3.0 V
Low-speed
mode
VCC = 5.0 V
VCC = 3.0 V
In STP state
(All oscillation stopped)
Increment when A/D
conversion is executed
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 119 of 128
f(XIN) = 16.8 MHz
f(XIN) = 12.5 MHz
f(XIN) = 8.4 MHz
f(XIN) = 4.2 MHz
f(XIN) = 16.8 MHz (in WIT state)
f(XIN) = 8.4 MHz
f(XIN) = 4.2 MHz
f(XIN) = 2.1 MHz
f(XIN) = 16.8 MHz
f(XIN) = 12.5 MHz
f(XIN) = 8.4 MHz
f(XIN) = 16.8 MHz (in WIT state)
f(XIN) = 12.5 MHz
f(XIN) = 8.4 MHz
f(XIN) = 6.3 MHz
f(XIN) = stopped
In WIT state
f(XIN) = stopped
In WIT state
Ta = 25 °C
Ta = 85 °C
f(XIN) = 16.8 MHz, VCC = 5.0 V
In Middle-, high-speed mode
Min.
Limits
Typ.
5.5
4.5
3.5
2.2
2.2
2.7
1.8
1.1
3.0
2.4
2.0
2.1
1.7
1.5
1.3
410
4.5
400
3.7
0.55
0.75
1000
Max.
8.3
6.8
5.3
3.3
3.3
4.1
2.7
1.7
4.5
3.6
3.0
3.2
2.6
2.3
2.0
630
6.8
600
5.6
3.0
Unit
mA
mA
mA
mA
μA
μA
μA
μA
3804 Group (Spec.L)
A/D converter characteristics
Table 27 A/D converter recommended operating conditions
(VCC = 2.7 to 5.5 V, VSS = AVSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Symbol
Parameter
Power source voltage
(When A/D converter is used)
VCC
VREF
AVSS
VIA
f(XIN)
Limits
Conditions
8-bit A/D mode(1)
10-bit A/D
Analog convert reference voltage
Analog power source voltage
Analog input voltage AN0-AN15
Main clock input oscillation
frequency
(When A/D converter is used)
Min.
2.7
Typ.
5.0
Max.
5.5
2.7
5.0
5.5
mode(2)
2.0
Unit
V
VCC
V
V
V
MHz
0
2.7 ≤ VCC = VREF < 4.0 V
0
0.5
VCC
4.0 ≤ VCC = VREF < 4.5 V
0.5
( 24.6 × V CC – 62.7 ) × 1.05
--------------------------------------------------------------------3
4.5 ≤ VCC = VREF ≤ 5.5 V
0.5
16.8
( 9 × V CC – 0.3 ) × 1.05
---------------------------------------------------------3
NOTES:
1. 8-bit A/D mode: When the conversion mode selection bit (bit 7 of address 003816) is “1”.
2. 10-bit A/D mode: When the conversion mode selection bit (bit 7 of address 003816) is “0”.
Table 28 A/D converter characteristics
(VCC = 2.7 to 5.5 V, VSS = AVSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Symbol
−
Parameter
Test conditions
Resolution
−
Absolute accuracy
(excluding quantization error)
tCONV
8-bit A/D mode(1)
10-bit A/D mode(2)
10
10-bit A/D
Conversion time
Limits
Typ.
Max.
8
8-bit A/D mode(1)
8-bit A/D
mode(2)
Min.
II(AD)
bit
2.7 ≤ VREF ≤ 5.5 V
±2
LSB
2.7 ≤ VREF ≤ 5.5 V
±4
LSB
50
2tc(XIN)
mode(1)
61
10-bit A/D mode(2)
RLADDER
IVREF
Unit
Ladder resistor
Reference power
at A/D converter operated VREF = 5.0 V
source input current at A/D converter stopped VREF = 5.0 V
A/D port input current
12
50
35
150
kΩ
μA
μA
μA
100
200
5.0
5.0
NOTES:
1. 8-bit A/D mode: When the conversion mode selection bit (bit 7 of address 003816) is “1”.
2. 10-bit A/D mode: When the conversion mode selection bit (bit 7 of address 003816) is “0”.
D/A converter characteristics
Table 29 D/A converter characteristics
(VCC = 2.7 to 5.5 V, VREF = 2.7 V to VCC, VSS = AVSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Symbol
−
−
tsu
RO
IVREF
Parameter
Resolution
Absolute accuracy
Min.
Limits
Typ.
4.0 ≤ VREF ≤ 5.5 V
2.7 ≤ VREF < 4.0 V
Setting time
Output resistor
2
3.5
Reference power source input current(1)
Unit
Max.
8
1.0
2.5
3
5
3.2
bit
%
μs
kΩ
mA
NOTE:
1. Using one D/A converter, with the value in the DA conversion register of the other D/A converter being “0016”.
Power source circuit timing characteristics
Table 30 Power source circuit timing characteristics
(VCC = 2.7 to 5.5 V, VREF = 2.7 V to VCC, VSS = AVSS = 0 V, Ta = –20 to 85 °C, unless otherwise noted)
Symbol
td(P−R)
Parameter
Internal power source stable time at power-on
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 120 of 128
Test conditions
2.7 ≤ VCC < 5.5 V
Min.
Limits
Typ.
Max.
2
Unit
ms
3804 Group (Spec.L)
Timing requirements and switching characteristics
Table 31 Timing requirements (1)
(VCC = 2.7 to 5.5 V, VSS = 0V, Ta = –20 to 85 °C, unless otherwise noted)
Symbol
tW(RESET)
tC(XIN)
Limits
Min.
td(P-R)ms + 16
Parameter
Reset input “L” pulse width
Main clock XIN
input cycle time
tWH(XIN)
Main clock XIN
input “H” pulse width
tWL(XIN)
Main clock XIN
input “L” pulse width
tC(XCIN)
tWH(XCIN)
tWL(XCIN)
tC(CNTR)
Sub-clock XCIN input cycle time
Sub-clock XCIN input “H” pulse width
Sub-clock XCIN input “L” pulse width
CNTR0−CNTR2
input cycle time
tWH(CNTR)
CNTR0−CNTR2
input “H” pulse width
tWL(CNTR)
CNTR0−CNTR2
input “L” pulse width
tWH(INT)
INT00, INT01, INT1, INT2,
INT3, INT40, INT41
input “H” pulse width
tWL(INT)
INT00, INT01, INT1, INT2,
INT3, INT40, INT41
input “L” pulse width
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 121 of 128
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
59.5
10000/(86 VCC − 219)
2.7 ≤ VCC < 4.0 V
26 × 103/(82 VCC − 3)
25
4000/(86 VCC − 219)
10000/(82 VCC − 3)
25
4000/(86 VCC − 219)
10000/(82 VCC − 3)
20
5
5
120
160
250
48
64
115
48
64
115
48
64
115
48
64
115
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
Typ.
Max.
Unit
XIN cycle
ns
ns
ns
μs
μs
μs
ns
ns
ns
ns
ns
3804 Group (Spec.L)
Table 32 Timing requirements (2)
(VCC = 2.7 to 5.5 V, VSS = 0 V, Ta = −20 to 85 °C, unless otherwise noted)
Symbol
Parameter
tC(SCLK1)
tC(SCLK3)
Serial I/O1, serial I/O3
clock input cycle time(1)
tWH(SCLK1)
tWH(SCLK3)
Serial I/O1, serial I/O3
clock input “H” pulse width(1)
tWL(SCLK1)
tWL(SCLK3)
Serial I/O1, serial I/O3
clock input “L” pulse width(1)
tsu(RxD1-SCLK1)
tsu(RxD3-SCLK3)
Serial I/O1, serial I/O3
clock input setup time
th(SCLK1-RxD1)
th(SCLK3-RxD3)
Serial I/O1, serial I/O3
clock input hold time
tC(SCLK2)
Serial I/O2
clock input cycle time
tWH(SCLK2)
Serial I/O2
clock input “H” pulse width
tWL(SCLK2)
Serial I/O2
clock input “L” pulse width
tsu(SIN2-SCLK2)
Serial I/O2
clock input setup time
th(SCLK2-SIN2)
Serial I/O2
clock input hold time
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
Min.
250
320
500
120
150
240
120
150
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
240
70
90
100
32
40
50
500
650
1000
200
260
400
200
260
400
100
130
200
100
130
150
NOTE:
1. When bit 6 of address 001A16 and bit 6 of address 003216 are “1” (clock synchronous).
Divide this value by four when bit 6 of address 001A16 and bit 6 of address 003216 are “0” (UART).
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 122 of 128
Limits
Typ.
Max.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3804 Group (Spec.L)
Table 33 Switching characteristics
(VCC = 2.7 to 5.5 V, VSS = 0 V, Ta = −20 to 85 °C, unless otherwise noted)
Symbol
Parameter
tWH(SCLK1)
tWH(SCLK3)
Serial I/O1, serial I/O3
clock output “H” pulse
width
tWL(SCLK1)
tWL(SCLK3)
Serial I/O1, serial I/O3
clock output “L” pulse
width
td(SCLK1-TxD1)
td(SCLK3-TxD3)
Serial I/O1, serial I/O3
output delay time(1)
tV(SCLK1-TxD1)
tV(SCLK3-TxD3)
Serial I/O1, serial I/O3
output valid time(1)
tr(SCLK1)
tr(SCLK3)
Serial I/O1, serial I/O3
rise time of clock
output
tf(SCLK1)
tf(SCLK3)
Serial I/O1, serial I/O3
fall time of clock output
tWH(SCLK2)
Serial I/O2
clock output “H” pulse
width
tWL(SCLK2)
Serial I/O2
clock output “L” pulse
width
td(SCLK2-SOUT2) Serial I/O2
output delay time
tV(SCLK2-SOUT2) Serial I/O2
output valid time
tf(SCLK2)
Serial I/O2
fall time of clock output
tr(CMOS)
CMOS
rise time of output(2)
tf(CMOS)
CMOS
fall time of output(2)
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
4.5 ≤ VCC ≤ 5.5 V
4.0 ≤ VCC < 4.5 V
2.7 ≤ VCC < 4.0 V
Test
conditions
Limits
Min.
tC(SCLK1)/2-30, tC(SCLK3)/2-30
tC(SCLK1)/2-35, tC(SCLK3)/2-35
tC(SCLK1)/2-40, tC(SCLK3)/2-40
tC(SCLK1)/2-30, tC(SCLK3)/2-30
tC(SCLK1)/2-35, tC(SCLK3)/2-35
tC(SCLK1)/2-40, tC(SCLK3)/2-40
Typ.
ns
140
200
350
−30
−30
−30
tC(SCLK2)/2-160
tC(SCLK2)/2-200
tC(SCLK2)/2-240
tC(SCLK2)/2-160
tC(SCLK2)/2-200
tC(SCLK2)/2-240
ns
ns
ns
ns
200
250
300
0
0
0
10
12
15
10
12
15
1. When the P45/TXD1 P-channel output disable bit of the UART1 control register (bit 4 of address 001B16) is “0”.
2. When the P35/TXD3 P4-channel output disable bit of the UART3 control register (bit 4 of address 003316) is “0”.
Page 123 of 128
ns
ns
30
35
40
30
35
40
Fig.114
Unit
ns
NOTES:
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Max.
ns
ns
30
35
40
30
35
40
30
35
40
ns
ns
ns
3804 Group (Spec.L)
Measurement output pin
1kΩ
100 pF
Measurement output pin
100 pF
CMOS output
N-channel open-drain output
Fig. 114 Circuit for measuring output switching characteristics (1)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 124 of 128
Fig. 115 Circuit for measuring output switching
characteristics (2)
3804 Group (Spec.L)
Single-chip mode timing diagram
tC(CNTR)
tWL(CNTR)
tWH(CNTR)
CNTR0, CNTR1
CNTR2
0.8VCC
INT1, INT2, INT3
INT00, INT40
INT01, INT41
0.2VCC
tWH(INT)
tWL(INT)
0.8VCC
0.2VCC
tW(RESET)
RESET
0.8VCC
0.2VCC
tC(XIN)
tWL(XIN)
tWH(XIN)
0.8VCC
XIN
0.2VCC
tC(XCIN)
tWL(XCIN)
tWH(XCIN)
0.8VCC
XCIN
0.2VCC
tC(SCLK1), tC(SCLK2), tC(SCLK3)
SCLK1
SCLK2
SCLK3
tf tWL(SCLK1), tWL(SCLK2), tWL(SCLK3) tr tWH(SCLK1), tWH(SCLK2), tWH(SCLK3)
0.8VCC
0.2VCC
tsu(RXD1-SCLK1),
tsu(SIN2-SCLK2),
tsu(RXD3-SCLK3)
R XD 1
R XD 3
SIN2
th(SCLK1-RXD1),
th(SCLK2-SIN2),
th(SCLK3-RXD3)
0.8VCC
0.2VCC
td(SCLK1-TXD1), td(SCLK2-SOUT2), td(SCLK3-TXD3)
T XD 1
T XD 3
SOUT2
Fig. 116 Timing diagram (in single-chip mode)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 125 of 128
tv(SCLK1-TXD1),
tv(SCLK2-SOUT2),
tv(SCLK3-TXD3)
3804 Group (Spec.L)
Table 34 Multi-master I2C-BUS bus line characteristics
Symbol
Standard clock mode
Parameter
Min.
4.7
4.0
4.7
tBUF
tHD;STA
tLOW
tR
Bus free time
Hold time for START condition
Hold time for SCL clock = ”0”
Rising time of both SCL and SDA signals
tHD;DAT
tHIGH
tF
Data hold time
Hold time for SCL clock = “1”
Falling time of both SCL and SDA signals
0
4.0
tSU;DAT
tSU;STA
tSU;STO
Data setup time
Setup time for repeated START condition
Setup time for STOP condition
250
4.7
4.0
High-speed clock mode
Max.
1000
300
Unit
Min.
1.3
0.6
1.3
Max.
20+0.1Cb(1)
0
0.6
300
ns
0.9
μs
μs
20+0.1Cb(1)
100
0.6
0.6
300
μs
μs
μs
ns
ns
μs
μs
NOTE:
1. Cb = total capacitance of 1 bus line
SDA
tHD:STA
tBUF
tLOW
SCL
P
tR
tF
P
Sr
S
tHD:STA
tsu:STO
tHD:DTA
tHIGH
tsu:DAT
tsu:STA
S : START condition
Sr: RESTART condition
P : STOP condition
Fig. 117 Timing diagram of multi-master I2C-BUS
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 126 of 128
3804 Group (Spec.L)
PACKAGE OUTLINE
Diagrams showing the latest package dimensions and mounting information are available in the “Packages” section of
the Renesas Technology website.
RENESAS Code
PRDP0064BA-A
Previous Code
64P4B
MASS[Typ.]
7.9g
33
1
32
*1
E
64
e1
JEITA Package Code
P-SDIP64-17x56.4-1.78
c
D
A
A2
*2
NOTE)
1. DIMENSIONS "*1" AND "*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION "*3" DOES NOT
INCLUDE TRIM OFFSET.
A1
L
Reference
Symbol
SEATING PLANE
*3
e
bp
b3
*3
e1
D
E
A
A1
A2
bp
b2
b3
c
b2
e
L
JEITA Package Code
P-LQFP64-10x10-0.50
RENESAS Code
PLQP0064KB-A
Previous Code
64P6Q-A / FP-64K / FP-64KV
Dimension in Millimeters
Min
18.75
56.2
16.85
Nom
19.05
56.4
17.0
Max
19.35
56.6
17.15
5.08
0.38
0.4
0.65
0.9
0.2
0°
1.528
2.8
3.8
0.5 0.6
0.75 1.05
1.0 1.3
0.25 0.32
15°
1.778 2.028
MASS[Typ.]
0.3g
HD
*1
D
48
33
49
NOTE)
1. DIMENSIONS "*1" AND "*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION "*3" DOES NOT
INCLUDE TRIM OFFSET.
32
bp
64
1
c1
Terminal cross section
ZE
17
Reference
Symbol
c
E
*2
HE
b1
16
Index mark
ZD
c
A
*3
A1
y
e
A2
F
bp
L
x
L1
Detail F
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 127 of 128
D
E
A2
HD
HE
A
A1
bp
b1
c
c1
e
x
y
ZD
ZE
L
L1
Dimension in Millimeters
Min Nom Max
9.9 10.0 10.1
9.9 10.0 10.1
1.4
11.8 12.0 12.2
11.8 12.0 12.2
1.7
0.05 0.1 0.15
0.15 0.20 0.25
0.18
0.09 0.145 0.20
0.125
8°
0°
0.5
0.08
0.08
1.25
1.25
0.35 0.5 0.65
1.0
3804 Group (Spec.L)
JEITA Package Code
P-LQFP64-14x14-0.80
RENESAS Code
PLQP0064GA-A
Previous Code
64P6U-A
MASS[Typ.]
0.7g
HD
*1
D
33
48
49
NOTE)
1. DIMENSIONS "*1" AND "*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION "*3" DOES NOT
INCLUDE TRIM OFFSET.
32
bp
c
HE
Reference
Symbol
*2
E
c1
b1
Terminal cross section
ZE
D
E
A2
HD
HE
A
A1
bp
b1
c
c1
64
17
A2
16
Index mark
c
ZD
A
1
A1
F
L
L1
y
*3
e
JEITA Package Code
P-TFLGA64-6x6-0.65
RENESAS Code
PTLG0064JA-A
e
x
y
ZD
ZE
L
L1
Detail F
bp
x
Previous Code
64F0G
w S B
Min Nom Max
13.9 14.0 14.1
13.9 14.0 14.1
1.4
15.8 16.0 16.2
15.8 16.0 16.2
1.7
0.1 0.2
0
0.32 0.37 0.42
0.35
0.09 0.145 0.20
0.125
8°
0°
0.8
0.20
0.10
1.0
1.0
0.3 0.5 0.7
1.0
MASS[Typ.]
0.07g
b1
S
AB
b
D
Dimension in Millimeters
S
w S A
AB
e
A
e
H
G
F
E
E
D
C
B
A
y S
x4
v
Index mark
(Laser mark)
Rev.1.00 Oct 27, 2008
REJ03B0266-0100
Page 128 of 128
1
2
3
Index mark
4
5
6
7
8
Reference Dimension in Millimeters
Symbol
Min
D
E
v
w
A
e
b
b1
x
y
Nom Max
6.0
6.0
0.15
0.20
1.05
0.65
0.31 0.35 0.39
0.39 0.43 0.47
0.08
0.10
REVISION HISTORY
Rev.
Date
1.00
Oct. 27, 2008
3804 Group (Spec.L) Data Sheet
Description
Page
-
Summary
First edition issued
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