HYNIX SEMICONDUCTOR INC.
8-BIT SINGLE-CHIP MICROCONTROLLERS
HMS99C51
HMS99C52
User’s Manual (Ver. 1.0)
Version 1.0
Published by
MCU Application Team
2002 Hynix semiconductor All right reserved.
Additional information of this manual may be served by Hynix semiconductor offices in Korea or Distributors
and Representatives listed at address directory.
Hynix semiconductor reserves the right to make changes to any information here in at any time without notice.
The information, diagrams and other data in this manual are correct and reliable; however, Hynix semiconductor is in no way responsible for any violations of patents or other rights of the third party generated by the use
of this manual.
Device Naming Structure
XX
FLASH version
Hynix semiconductor MCU
HMS99X5X
Package Type
Blank: 40PDIP
PL:
44PLCC
Q:
44MQFP
ROM size
1: 4k bytes
2: 8k bytes
Operating Voltage
C: 4.5~5.5V
HMS99C5X Series Selection Guide
Operating
Voltage (V)
4.5~5.5
ROM size (bytes)
FLASH
RAM size
(bytes)
4K
8K
128
256
Device Name
HMS99C51
HMS99C52
Operating
Frequency (MHz)
40
40
HMS99C5X Series
HMS99C51
• Fully compatible to standard MCS-51 microcontroller
• Wide operating frequency up to 40MHz
(for more detail, see “HMS99C5X Series Selection Guide”)
• X2 Speed Improvement capability ( X2 Mode : 6 clocks/machine cycle)
20MHz @5V (Equivalent to 40MHz @5V)
• 4K bytes FLASH ROM
• 128 × 8Bit RAM
• 64K external program memory space
• 64K external data memory space
• Four 8-bit ports
• Two 16-bit Timers / Counters
• USART
• Programmable ALE pin enable / disable (Low EMI)
• Five interrupt sources, two priority levels
• Power saving Idle and power down mode
• P-DIP-40, P-LCC-44, P-MQFP-44 package
• Temperature Ranges : -40°C ~ 85°C
Block Diagram
RAM
128 × 8
T0
CPU
T1
FLASH ROM
4K × 8
0
8-BIT
USART
PORT 0
I/O
PORT 1
I/O
PORT 2
I/O
PORT 3
I/O
Jan. 2003 Ver 1.0
HMS99C5X Series
HMS99C52
• Fully compatible to standard MCS-51 microcontroller
• Wide operating frequency up to 40MHz
(for more detail, see “HMS99C5X Series Selection Guide”)
• X2 Speed Improvement capability ( X2 Mode : 6 clocks/machine cycle)
20MHz @5V (Equivalent to 40MHz @5V)
• 8K bytes FLASH ROM
• 256 × 8Bit RAM
• 64K external program memory space
• 64K external data memory space
• Four 8-bit ports
• Three 16-bit Timers / Counters (Timer2 with up/down counter feature)
• USART
• One clock output port
• Programmable ALE pin enable / disable (Low EMI)
• Six interrupt sources, two priority levels
• Power saving Idle and power down mode
• P-DIP-40, P-LCC-44, P-MQFP-44 package
• Temperature Ranges : -40°C ~ 85°C
Block Diagram
RAM
256 × 8
T0
CPU
T2
8-BIT
USART
T1
FLASH ROM
8K × 8
Jan. 2003 Ver 1.0
PORT 0
I/O
PORT 1
I/O
PORT 2
I/O
PORT 3
I/O
1
HMS99C5X Series
PIN CONFIGURATION
P0.1 / AD1
P0.2 / AD2
P0.3 / AD3
41
40
N.C.*
42
P1.0 / T2
1
VCC
P1.1 / T2EX
2
P0.0 / AD0
P1.2
3
43
P1.3
4
44
P1.4
5
INDEX
CORNER
6
44-PLCC Pin Configuration (top view)
PSEN
INT1 / P3.3
15
31
P2.7 / A15
T0 / P3.4
16
30
P2.6 / A14
T1 / P3.5
17
29
P2.5 / A13
28
32
P2.4 / A12
14
27
ALE / PROG
INT0 / P3.2
26
33
P2.2 / A10
13
P2.3 / A11
N.C.*
TxD / P3.1
25
34
P2.1 / A9
12
24
EA / VPP
N.C.*
P2.0 / A8
35
23
11
N.C.*
P0.7 / AD7
RxD / P3.0
22
36
VSS
10
21
P0.6 / AD6
RESET
XTAL1
37
20
9
XTAL2
P0.5 / AD5
P1.7
19
P0.4 / AD4
38
18
39
8
RD / P3.7
7
P1.6
WR / P3.6
P1.5
N.C.: Do not connect.
2
Jan. 2003 Ver 1.0
HMS99C5X Series
40-PDIP Pin Configuration (top view)
Jan. 2003 Ver 1.0
T2 / P1.0
1
40
VCC
T2EX / P1.1
2
39
P0.0 / AD0
P1.2
3
38
P0.1 / AD1
P1.3
4
37
P0.2 / AD2
P1.4
5
36
P0.3 / AD3
P1.5
6
35
P0.4 / AD4
P1.6
7
34
P0.5 / AD5
P1.7
8
33
P0.6 / AD6
RESET
9
32
P0.7 / AD7
RxD / P3.0
10
31
EA / VPP
TxD / P3.1
11
30
ALE / PROG
INT0 / P3.2
12
29
PSEN
INT1 / P3.3
13
28
P2.7 / A15
T0 / P3.4
14
27
P2.6 / A14
T1 / P3.5
15
26
P2.5 / A13
WR / P3.6
16
25
P2.4 / A12
RD / P3.7
17
24
P2.3 / A11
XTAL2
18
23
P2.2 / A10
XTAL1
19
22
P2.1 / A9
VSS
20
21
P2.0 / A8
3
HMS99C5X Series
P1.4
P1.3
P1.2
P1.1 / T2EX
P1.0 / T2
N.C.*
VCC
P0.0 / AD0
P0.1 / AD1
P0.2 / AD2
P0.3 / AD3
44
43
42
41
40
39
38
37
36
35
34
44-MQFP Pin Configuration (top view)
PSEN
INT1 / P3.3
9
25
P2.7 / A15
T0 / P3.4
10
24
P2.6 / A14
T1 / P3.5
11
23
P2.5 / A13
22
26
P2.4 / A12
8
21
ALE / PROG
INT0 / P3.2
P2.3 / A11
27
20
7
P2.2 / A10
N.C.*
TxD / P3.1
19
28
P2.1 / A9
6
18
EA / VPP
N.C.*
P2.0 / A8
29
17
5
N.C.*
P0.7 / AD7
RxD / P3.0
16
30
VSS
4
15
P0.6 / AD6
RESET
XTAL1
31
14
3
XTAL2
P0.5 / AD5
P1.7
13
P0.4 / AD4
32
12
33
2
RD / P3.7
1
P1.6
WR / P3.6
P1.5
N.C.: Do not connect.
4
Jan. 2003 Ver 1.0
HMS99C5X Series
Logic Symbol
VCC
XTAL1
XTAL2
RESET
VSS
Port 0
8-bit Digital I/O
Port 1
8-bit Digital I/O
Port 2
8-bit Digital I/O
EA/VPP
ALE/PROG
Port 3
8-bit Digital I/O
PSEN
Jan. 2003 Ver 1.0
5
HMS99C5X Series
PIN DEFINITIONS AND FUNCTIONS
Pin Number
Symbol
P1.0-P1.7
P3.0-P3.7
XTAL2
6
Input/
Output
Function
PLCC44
PDIP40
MQFP44
2-9
1-8
40-44,
1-3
2
3
1
2
40
41
2
1
40
11,
13-19
10-17
5, 7-13
11
10
5
P3.0 / RxD
13
11
7
P3.1 / TxD
14
15
16
17
18
12
13
14
15
16
8
9
10
11
12
P3.2 /INT0
P3.3 / INT1
P3.4 /T0
P3.5 /T1
P3.6 / WR
19
17
13
P3.7 /RD
20
18
14
I/O
Port1
Port 1 is an 8-bit bidirectional I/O port with internal
pull-ups. Port 1 pins that have 1s written to them are
pulled high by the internal pull-up resistors and can be
used as inputs. As inputs, port 1 pins that are
externally pulled low will source current because of
the pulls-ups (IIL, in the DC characteristics). Pins P1.0
and P1.1 also. Port1 also receives the low-order
address byte during program memory verification.
Port1 also serves alternate functions of Timer 2.
P1.0 / T2 :Timer/counter 2 external count input
P1.1 / T2EX :Timer/counter 2 trigger input
In HMS99C52:
P1.0 / T2, Clock Out : Timer/counter 2 external count
input, Clock Out
I/O
O
Port 3
Port 3 is an 8-bit bidirectional I/O port with internal
pull-ups. Port 3 pins that have 1s written to them are
pulled high by the internal pull-up resistors and can be
used as inputs. As inputs, port 3 pins that are
externally pulled low will source current because of
the pulls-ups (IIL, in the DC characteristics). Port 3 also
serves the special features of the 80C51 family, as
listed below.
receiver data input (asynchronous) or
data input output(synchronous) of serial
interface 0
transmitter data output (asynchronous)
or clock output (synchronous) of the
serial interface 0
interrupt 0 input/timer 0 gate control
interrupt 1 input/timer 1 gate control
counter 0 input
counter 1 input
the write control signal latches the data
byte from port 0 into the external data
memory
the read control signal enables the
external data memory to port 0
XTAL2
Output of the inverting oscillator amplifier.
Jan. 2003 Ver 1.0
HMS99C5X Series
Pin Number
Symbol
Input/
Output
Function
PLCC44
PDIP40
MQFP44
XTAL1
21
19
15
I
XTAL1
Input to the inverting oscillator amplifier and input to
the internal clock generator circuits.To drive the
device from an external clock source, XTAL1 should
be driven, while XTAL2 is left unconnected. There are
no requirements on the duty cycle of the external
clock signal, since the input to the internal clocking
circuitry is divided down by a divide-by-two flip-flop.
Minimum and maximum high and low times as well as
rise fall times specified in the AC characteristics must
be observed.
P2.0-P2.7
24-31
21-28
18-25
I/O
Port 2
Port 2 is an 8-bit bidirectional I/O port with internal
pull-ups. Port 2 pins that have 1s written to them are
pulled high by the internal pull-up resistors and can be
used as inputs. As inputs, port 2 pins that are
externally pulled low will source current because of
the pulls-ups (IIL, in the DC characteristics).Port 2
emits the high-order address byte during fetches from
external program memory and during accesses to
external data memory that use 16-bit addresses
(MOVX @DPTR). In this application it uses strong
internal pull-ups when emitting 1s. During accesses to
external data memory that use 8-bit addresses
(MOVX @Ri), port 2 emits the contents of the P2
special function register.
PSEN
32
29
26
O
The Program Store Enable
The read strobe to external program memory when
the device is executing code from the external
program memory. PSEN is activated twice each
machine cycle, except that two PSEN activations are
skipped during each access to external data memory.
PSEN is not activated during fetches from internal
program memory.
RESET
10
9
4
I
RESET
A high level on this pin for two machine cycles while
the oscillator is running resets the device. An internal
diffused resistor to VSS permits power-on reset using
only an external capacitor to VCC.
Jan. 2003 Ver 1.0
7
HMS99C5X Series
Pin Number
Symbol
ALE /
PROG
PLCC44
PDIP40
MQFP44
33
30
27
Input/
Output
O
Function
The Address Latch Enable / Program pulse
Output pulse for latching the low byte of the address
during an access to external memory. In normal
operation, ALE is emitted at a constant rate of 1/6 the
oscillator frequency, and can be used for external
timing or clocking. Note that one ALE pulse is skipped
during each access to external data memory. This pin
is also the program pulse input (PROG) during
EPROM programming.
If desired, ALE operation can be disabled by setting
bit 0 of SFR location 8EH. With this bit set, the pin is
weakly pulled high. The ALE disable feature will be
terminated by reset. Setting the ALE-disable bit has
no affect if the microcontroller is in external execution
mode.
EA / VPP
35
31
29
I
External Access Enable / Program Supply Voltage
EA must be external held low to enable the device to
fetch code from external program memory locations
0000H to FFFFH. If EA is held high, the device
executes from internal program memory unless the
program counter contains an address greater than its
internal memory size. This pin also receives the
12.75V programming supply voltage (VPP) during
EPROM programming.
Note;
8
however, that if any of the Lock bits are
programmed, EA will be internally
latched on reset.
P0.0-P0.7
36-43
32-39
30-37
I/O
Port 0
Port 0 is an 8-bit open-drain bidirectional I/O port.
Port 0 pins that have 1s written to them float and can
be used as high-impedance inputs.
Port 0 is also the multiplexed low-order address and
data bus during accesses to external program and
data memory. In this application it uses strong internal
pull-ups when emitting 1s. Port 0 also outputs the
code bytes during program verification in the
GMS97X5X. External pull-up resistors are required
during program verification.
VSS
22
20
16
-
Circuit ground potential
VCC
44
40
38
-
Supply terminal for all operating modes
N.C.
1,12
23,34
-
6,17
28,39
-
No connection
Jan. 2003 Ver 1.0
HMS99C5X Series
FUNCTIONAL DESCRIPTION
The HMS99C5X series is fully compatible to the standard 8051 microcontroller family.
It is compatible with the general 8051 family. While maintaining all architectural and operational characteristics
of the general 8051 family.
Figure 1 shows a block diagram of the HMS99C5X series
XTAL1
RAM
OSC & TIMING
XTAL2
RESET
CPU
EA/VPP
Timer 0
128/256×8
ALE/PROG
PSEN
FRASH
4K/8K
Port 0
Port 0
8-bit Digit. I/O
Port 1
Port 1
8-bit Digit. I/O
Port 2
Port 2
8-bit Digit. I/O
Port 3
Port 3
8-bit Digit. I/O
Timer 1
Timer 2
Interrupt Unit
Serial Channel
Figure 1. Block Diagram of the HMS99C5X series
Jan. 2003 Ver 1.0
9
HMS99C5X Series
CPU
The HMS99C5X series is efficient both as a controller and as an arithmetic processor. It has extensive facilities
for binary and BCD arithmetic and excels in its bit-handling capabilities. Efficient use of program memory results from an instruction set consisting of 44% one-byte, 41% two-byte, and 15% three-byte instructions. With
a 12 MHz crystal, 58% of the instructions are executed in 1.0µs (40MHz: 300ns).
Special Function Register PSW
Bit No.
Addr. D0H
LSB
MSB
7
6
CY
AC
5
4
3
2
F0 RS1 RS0 OV
Bit
1
0
F1
P
Function
CY
Carry Flag
AC
Auxiliary Carry Flag (for BCD operations)
F0
General Purpose Flag
RS1
0
0
1
1
PSW
RS0
0
1
0
1
Register Bank select control bits
Bank 0 selected, data address 00H - 07H
Bank 1 selected, data address 08H - 0FH
Bank 2 selected, data address 10H - 17H
Bank 3 selected, data address 18H - 1FH
OV
Overflow Flag
F1
General Purpose Flag
P
Parity Flag
Set/cleared by hardware each instruction cycle to indicate an odd/even
number of "one" bits in the accumulator, i.e. even parity.
Reset value of PSW is 00H.
10
Jan. 2003 Ver 1.0
HMS99C5X Series
SPECIAL FUNCTION REGISTERS
All registers, except the program counter and the four general purpose register banks, reside in the special function register area.
The 28 special function registers (SFR) include pointers and registers that provide an interface between the CPU
and the other on-chip peripherals. There are also 128 directly addressable bits within the SFR area.
All SFRs are listed in Table 1, Table 2, and Table 3.
In Table 1 they are organized in numeric order of their addresses. In Table 2 they are organized in groups which
refer to the functional blocks of the HMS99C5X series. Table 3 illustrates the contents of the SFRs
Table 1. Special Function Registers in Numeric Order of their Addresses (cont’d)
Address
Register
Contents after
Reset
Address
Register
Contents after
Reset
80H
81H
82H
83H
84H
85H
86H
87H
P0 1)
SP
DPL
DPH
reserved
reserved
reserved
PCON
FFH
07H
00H
00H
XXH 2)
XXH 2)
XXH 2)
0XXX0000B 2)
88H
89H
8AH
8BH
8CH
8DH
8EH
8FH
TCON 1)
TMOD
TL0
TL1
TH0
TH1
AUXR0
CKCON
00H
00H
00H
00H
00H
00H
XXH 2)
XXXXXXX0B 2)
90H
91H
92H
93H
94H
95H
96H
97H
P1 1)
reserved
reserved
reserved
reserved
reserved
reserved
reserved
FFH
00H
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
98H
99H
9AH
9BH
9CH
9DH
9EH
9FH
SCON 1)
SBUF
reserved
reserved
reserved
reserved
reserved
reserved
00H
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
A0H
A1H
A2H
A3H
A4H
A5H
A6H
A7H
P2 3)
reserved
reserved
reserved
reserved
reserved
reserved
reserved
FFH
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
A8H
A9H
AAH
ABH
ACH
ADH
AEH
AFH
IE 1)
reserved
reserved
reserved
reserved
reserved
reserved
reserved
0X000000B 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
B0H
B1H
B2H
B3H
B4H
B5H
B6H
B7H
P3 1)
reserved
reserved
reserved
reserved
reserved
reserved
reserved
FFH
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
B8H
B9H
BAH
BBH
BCH
BDH
BEH
BFH
IP 1)
reserved
reserved
reserved
reserved
reserved
reserved
reserved
XX000000B 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
Jan. 2003 Ver 1.0
11
HMS99C5X Series
Table 1. Special Function Registers in Numeric Order of their Addresses (cont’d)
Address
Register
Contents after
Reset
Address
Register
Contents after
Reset
C0H
C1H
C2H
C3H
C4H
C5H
C6H
C7H
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
XXH
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
C8H 3)
C9H 4)
CAH 3)
CBH 3)
CCH 3)
CDH 3)
CEH
CFH
T2CON 1)
T2MOD
RC2L
RC2H
TL2
TH2
reserved
reserved
00H
XXXXXX00B 2)
00H
00H
00H
00H
XXH 2)
XXH 2)
D0H
D1H
D2H
D3H
D4H
D5H
D6H
D7H
PSW 1)
reserved
reserved
reserved
reserved
reserved
reserved
reserved
FFH
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
D8H
D9H
DAH
DBH
DCH
DDH
DEH
DFH
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
E0H
E1H
E2H
E3H
E4H
E5H
E6H
E7H
ACC 1)
reserved
reserved
reserved
reserved
reserved
reserved
reserved
00H
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
E8H
E9H
EAH
EBH
ECH
EDH
EEH
EFH
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
F0H
F1H
F2H
F3H
F4H
F5H
F6H
F7H
B 1)
reserved
reserved
reserved
reserved
reserved
reserved
reserved
00H
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
F8H
F9H
FAH
FBH
FCH
FDH
FEH
FFH
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
XXH 2)
1) Bit-addressable Special Function Register.
2) X means that the value is indeterminate and the location is reserved.
3) Bit-addressable Special Function Register.
4) These Registers are in the HMS99C52 only.
12
Jan. 2003 Ver 1.0
HMS99C5X Series
Table 2. Special Function Registers - Functional Blocks
Block
Symbol
Name
Address
Contents
after Reset
CPU
ACC
B
DPH
DPL
PSW
SP
Accumulator
B-Register
Data Pointer, High Byte
Data Pointer, Low Byte
Program Status Word Register
Stack Pointer
E0H 1)
F0H 1)
83H
82H
D0H 1)
81H
00H
00H
00H
00H
00H
07H
Interrupt System
IE
IP
Interrupt Enable Register
Interrupt Priority Register
A8H 1)
B8H 1)
0X000000B 2)
XX000000B 2)
Ports
P0
P1
P2
P3
Port 0
Port 1
Port 2
Port 3
80H 1)
90H 1)
A0H 1)
B0H 1)
FFH
FFH
FFH
FFH
Serial Channels
PCON 3)
SBUF
SCON
Power Control Register
Serial Channel Buffer Reg.
Serial Channel 0 Control Reg.
87H
99H
98H 1)
0XXX0000B 2)
XXH 2)
00H
Timer 0/ Timer 1
TCON
TH0
TH1
TL0
TL1
TMOD
Timer 0/1 Control Register
Timer 0, High Byte
Timer 1, High Byte
Timer 0, Low Byte
Timer 1, Low Byte
Timer Mode Register
88H 1)
8CH
8DH
8AH
8BH
89H
00H
00H
00H
00H
00H
00H
Timer 2
T2CON
T2MOD
RC2H
RC2L
TH2
TL2
AUXR0
Timer 2 Control Register
Timer 2 Mode Register
Timer 2 Reload Capture Reg., High Byte
Timer 2 Reload Capture Reg., Low Byte
Timer 2, High Byte
Timer 2, Low Byte
Aux. Register 0
C8H 1)
C9H
CBH
CAH
CDH
CCH
8EH
00H
00H
00H
00H
00H
00H
XXXXXXX0B 2)
PCON 3)
Power Control Register
87H
0XXX0000B 2)
Power
Modes
Saving
1) Bit-addressable Special Function register
2) X means that the value is indeterminate and the location is reserved
3) This special function register is listed repeatedly since some bit of it also belong to other functional blocks
Table 3. Contents of SFRs, SFRs in Numeric Order
Address
Register
80H
P0
Jan. 2003 Ver 1.0
Bit 7
6
5
4
3
2
1
0
13
HMS99C5X Series
Table 3. Contents of SFRs, SFRs in Numeric Order
Address
Register
81H
SP
82H
DPL
83H
DPH
87H
Bit 7
6
5
4
3
2
1
0
PCON
SMOD
-
-
-
GF1
GF0
PDE
IDLE
88H
TCON
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
89H
TMOD
GATE
C/T
M1
MT
GATE
C/T
M1
M0
8AH
TL0
8BH
TL1
8CH
TH0
8DH
TH1
8EH
AUXR0
-
-
-
-
-
-
-
A0
8FH
CKCON
-
-
-
-
-
-
-
X2
90H
P1
98H
SCON
SM0
SM1
SM2
REN
TB8
RB8
TI
RI
99H
SBUF
A0H
P2
A8H
IE
EA
-
ET2
ES
ET1
EX1
ET0
EX0
B0H
P3
B8H
IP
-
-
PT2
PS
PT1
PX1
PT0
PX0
SFR bit and byte addressable
SFR not bit addressable
- : this bit location is reserved
14
Jan. 2003 Ver 1.0
HMS99C5X Series
Table 3. Contents of SFRs, SFRs in Numeric Order (cont’d)
Address
Register
Bit 7
6
5
4
3
2
1
0
C8H
T2CON
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
C/T2
CP/RL2
C9H
T2MOD
-
-
-
-
-
-
T2OE †
DCEN
CAH
RC2L
CBH
RC2H
CCH
TL2
CDH
TH2
D0H
PSW
CY
AC
F0
RS1
RS0
OV
F1
P
E0H
ACC
F0H
B
† indicates resident in the HMS99C52, not in HMS99C51.
A0
8EH
A0 : ALE Signal Disable bit
0 : Enable ALE Signal (Generated ALE Signal)
1 : Disable ALE Signal (Not Generated ALE Signal)
X2
8FH
X2 : CPU & Peripheral Clock Select bit
0 : Select 12 clock periods per machine cycle
1 : Select 6 clock periods per machine cycle
†
C9H
T2OE
T2OE : Timer2 Output Enable bit
0 : Disable Timer2 Output
1 : Enable Timer2 Output
SFR bit and byte addressable
SFR not bit addressable
- : this bit location is reserved
Jan. 2003 Ver 1.0
15
HMS99C5X Series
X2 MODE
The HMS99C5X core needs only 6 clock periods per machine cycle. This feature called ”X2” provides the following advantages:
• Divide frequency crystals by 2 (cheaper crystals) while keeping same CPU power.
• Save power consumption while keeping same CPU power (oscillator power saving).
• Save power consumption by dividing dynamically operating frequency by 2 in operating and idle
modes.
• Increase CPU power by 2 while keeping same crystal frequency.
In order to keep the original C51 compatibility, a divider by 2 is inserted between the XTAL1 signal and the
main clock input of the core (phase generator). This divider may be disabled by software.
X2 Mode Description
The clock for the whole circuit and peripheral is first divided by two before being used by the CPU core and
peripherals. This allows any cyclic ratio to be accepted on XTAL1 input. In X2 mode, as this divider is bypassed,
the signals on XTAL1 must have a cyclic ratio between 40 to 60%. Figure 2. shows the clock generation block
diagram. X2 bit is validated on XTAL1÷2 rising edge to avoid glitches when switching from X2 to STD mode.
Figure 3.shows the mode switching waveforms:
XTAL1
fOSC
÷2
0
State Machine: 6 clokc cyles
CPU control
1
X2
CKCON Register
Figure 2. Clock Generation Diagram
The X2 bit in the CKCON register allows to switch from 12 clock cycles per instruction to 6 clock cycles and
vice versa. At reset, the standard speed is activated (STD mode). Setting this bit activates the X2 feature(X2
mode).
CAUTION
In order to prevent any incorrect operation while operating in X2 mode, user must be aware that all peripherals
using clock frequency as time reference (UART, timers) will have their time reference divided by two. For example a free running timer generating an interrupt every 30 ms will then generate an interrupt every 15 ms.
UART with 2400 baud rate will have 4800 baud rate.
16
Jan. 2003 Ver 1.0
HMS99C5X Series
XTAL1
XTAL1:2
X2 bit
CPU Clock
STD Mode
X2 Mode
STD Mode
Figure 3. Mode Swithcing Waveforms
.
Jan. 2003 Ver 1.0
17
HMS99C5X Series
TIMER / COUNTER 0 AND 1
Timer/Counter 0 and 1 can be used in four operating modes as listed in Table 4:
Table 4. Timer/Counter 0 and 1 Operating Modes
TMOD
Mode
Input Clock
Description
Gate
C/T
M1
M0
internal
external (Max.)
0
8-bit timer/counter with a
divide-by-32 prescaler
X
X
0
0
fOSC ÷(12×32)
fOSC ÷(24×32)
1
16-bit timer/counter
X
X
0
1
fOSC ÷12
fOSC ÷24
2
8-bit timer/counter with
8-bit auto-reload
X
X
1
0
fOSC ÷12
fOSC ÷24
3
Timer/counter 0 used as
one 8-bit timer/counter and
one 8-bit timer Timer 1
stops
X
X
1
1
fOSC ÷12
fOSC ÷24
In the "timer" function (C/T = "0") the register is incremented every machine cycle. Therefore the count rate is
fOSC/12.
In the "counter" function the register is incremented in response to a 1-to-0 transition at its corresponding external input pin (P3.4/T0, P3.5/T1). Since it takes two machine cycles to detect a falling edge the max. count rate
is fOSC/24. External inputs INT0 and INT1 (P3.2, P3.3) can be programmed to function as a gate to facilitate
pulse width measurements. Figure 4 illustrates the input clock logic.
÷ 12
fOSC
fOSC ÷ 12
C/T
TMOD
0
Timer 0/1
Input Clock
P3.4/T0
P3.5/T1
Max. fOSC/24
1
TR0 / 1
TCON
Gate
&
=1
TMOD
≥1
P3.2 / INT0
P3.3 / INT1
Figure 4. Timer/Counter 0 and 1 Input Clock Logic
18
Jan. 2003 Ver 1.0
HMS99C5X Series
TIMER 2
Timer 2 is a 16-bit timer/Counter with an up/down count feature. It can operate either as timer or as an event
counter which is selected by bit C/T2 (T2CON.1). It has three operating modes as shown in Table 5.
Table 5. Timer/Counter 2 Operating Modes
T2CON
Mode
16-bit AutoReload
16-bit
Capture
Baud Rate
Generator
Off
Note: ↓ =
RCLK or
CP/RL2
TCLK
T2MOD T2CON
TR2
DCEN
EXEN2
P1.1/
T2EX
0
0
1
0
0
X
0
0
1
0
1
↓
0
0
0
0
1
1
1
1
X
X
0
1
0
1
1
X
0
X
0
1
1
X
1
↓
1
X
1
X
0
X
1
X
1
X
1
↓
X
X
0
X
X
X
Input Clock
Remarks
internal
external
(P1.0/T2)
reload upon overflow
reload trigger (falling edge)
Down counting
Up counting
fOSC ÷ 12
Max.
fOSC ÷24
16 bit Timer/ Counter (only up-counting)
capture TH2,TL2
→ RC2H,RC2L
fOSC ÷ 12
Max.
fOSC ÷ 24
no overflow
interrupt request
(TF2)
extra external interrupt ("Timer 2")
fOSC ÷ 12
Max.
fOSC ÷ 24
-
-
Timer 2 stops
falling edge
Jan. 2003 Ver 1.0
19
HMS99C5X Series
SERIAL INTERFACE (USART)
The serial port is full duplex and can operate in four modes (one synchronous mode, three asynchronous modes)
as illustrated in Table 6. The possible baud rates can be calculated using the formulas given in Table 7.
Table 6. USART Operating Modes
SCON
Mode
Baudrate
SM0
SM1
0
0
0
fOSC
-----------12
1
0
1
Timer 1/2 overflow rate
2
1
0
f OSC or fOSC
----------------------64
32
3
1
1
Timer 1/2 overflow rate
Description
Serial data enters and exits through RxD.
TxD outputs the shift clock. 8-bit are transmitted/received (LSB first)
8-bit UART
10 bits are transmitted (through TxD) or
received (RxD)
9-bit UART
11 bits are transmitted (TxD) or received (RxD)
9-bit UART
Like mode 2 except the variable baud rate
Table 7. Formulas for Calculating Baud rates
Baud Rate
derived from
Interface Mode
Baudrate
0
f OSC
-----------12
2
2
------------------ × fOSC
64
1,3
2
------------------ × ( Timer 1 overflow )
32
1,3
SMOD
fOSC
2
------------------ × --------------------------------------------------32
12 × [ 256 Ð ( TH1 ) ]
1,3
f OSC
---------------------------------------------------------------------------------32 × [ 65536 Ð ( RC2H, RC2L ) ]
Oscillator
SMOD
SMOD
Timer 1 (16-bit timer)
(8-bit timer with
8-bit auto reload)
Timer 2
20
Jan. 2003 Ver 1.0
HMS99C5X Series
INTERRUPT SYSTEM
The HMS99C5X series provides 5 (4K bytes ROM version) or 6 (above 8K bytes ROM version) interrupt sources with two priority levels. Figure 5 gives a general overview of the interrupt sources and illustrates the request
and control flags.
High
Priority
Timer 0 Overflow
TF0
TCON.5
ET0
PT0
IE.1
IP.1
ET1
PT1
IE.3
IP.3
EXF2
ET2
PT2
T2CON.6
IE.5
IP.5
Timer 1 Overflow
Low
Priority
TF1
TCON.7
Timer 2 Overflow
TF2
≥1
T2CON.7
P1.1/
T2EX
EXEN2
T2CON.3
UART
RI
≥1
SCON.0
TI
ES
PS
SCON.1
IE.4
IP.4
IT0
EX0
PX0
TCON.0
IE.0
IP.0
P3.2/
INT0
IE0
TCON.1
P3.3/
INT1
IE1
TCON.3
IT1
EX1
EA
PX1
TCON.2
IE.2
IE.7
IP.2
: Low level triggered
: Falling edge triggered
Figure 5. Interrupt Request Sources
Jan. 2003 Ver 1.0
21
HMS99C5X Series
Table 8. Interrupt Sources and their Corresponding Interrupt Vectors
Source (Request Flags)
RESET
IE0
TF0
IE1
TF1
RI + TI
TF2 + EXF2
Vectors
Vector Address
RESET
External interrupt 0
Timer 0 interrupt
External interrupt 1
Timer 1 interrupt
Serial port interrupt
Timer 2 interrupt
0000H
0003H
000BH
0013H
001BH
0023H
002BH
A low-priority interrupt can itself be interrupted by a high-priority interrupt, but not by another low priority interrupt. A high-priority interrupt cannot be interrupted by any other interrupt source.
If two requests of different priority level are received simultaneously, the request of higher priority is serviced.
If requests of the same priority are received simultaneously, an internal polling sequence determines which request is serviced. Thus within each priority level there is a second priority structure determined by the polling
sequence as shown in Table 9.
Table 9. Interrupt Priority-Within-Level
Interrupt Source
External Interrupt 0
Timer 0 Interrupt
External Interrupt 1
Timer 1 Interrupt
Serial Channel
Timer 2 Interrupt
22
IE0
TF0
IE1
TF1
RI + TI
TF2 + EXF2
Priority
High
↓
↓
↓
↓
Low
Jan. 2003 Ver 1.0
HMS99C5X Series
Power Saving Modes
Two power down modes are available, the Idle Mode and Power Down Mode.
The bits PDE and IDLE of the register PCON select the Power Down mode or the Idle mode, respectively. If
the Power Down mode and the Idle mode are set at the same time, the Power Down mode takes precedence.
Table 10 gives a general overview of the power saving modes.
Table 10. Power Saving Modes Overview
Mode
Entering
Instruction
Example
Idle mode
ORL PCON, #01H
- Enabled interrupt
- Hardware Reset
CPU is gated off
CPU status registers maintain their
data.
Peripherals are active
Power-Down mode
ORL PCON, #02H
Hardware Reset
Oscillator is stopped, contents of onchip RAM and SFR’s are maintained
(leaving Power Down Mode means
redefinition of SFR contents).
Leaving by
Remarks
In the Power Down mode of operation, VCC can be reduced to minimize power consumption. It must be ensured,
however, that VCC is not reduced before the Power Down mode is invoked, and that VCC is restored to its normal
operating level, before the Power Down mode is terminated. The reset signal that terminates the Power Down
mode also restarts the oscillator. The reset should not be activated before VCC is restored to its normal operating
level and must be held active long enough to allow the oscillator to restart and stabilize (similar to power-on
reset).
Jan. 2003 Ver 1.0
23
HMS99C5X Series
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
Ambient temperature under bias (TA)...................................................................................... -40 to + 85 °C
Storage temperature (TST)...................................................................................................... -65 to + 150 °C
Voltage on VCC pins with respect to ground (VSS) ................................................................. -0.5V to 6.5V
Voltage on any pin with respect to ground (VSS) ..........................................................-0.5V to VCC + 0.5V
Input current on any pin during overload condition............................................................-10mA to +10mA
Absolute sum of all input currents during overload condition...........................................................|100mA|
Power dissipation ............................................................................................................................... 200mW
Note: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage of the device. This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for longer periods may affect device reliability. During overload conditions (VIN > VCC or VIN < VSS)
the Voltage on VCC pins with respect to ground (VSS) must not exceed the values defined by the absolute maximum ratings.
24
Jan. 2003 Ver 1.0
HMS99C5X Series
DC Characteristics
DC Characteristics for HMS99C51/52
VCC= 5V + 10%, -15%; VSS=0V; TA= -40°C to 85°C
Parameter
Symbol
Limit Values
Min.
Max.
Un
it
Test Conditions
Input low voltage
(except EA, RESET)
VIL
-0.5
0.2VCC - 0.1
V
VCC= 5.5V
Input low voltage (EA)
VIL1
-0.5
0.2VCC - 0.1
V
VCC= 5.5V
Input low voltage (RESET)
VIL2
-0.5
0.2VCC + 0.1
V
VCC= 5.5V
Input high voltage (except
XTAL1, EA, RESET)
VIH
0.2VCC +
0.9
VCC + 0.5
V
VCC= 4.5V
Input high voltage to XTAL1
VIH1
0.7VCC
VCC + 0.5
V
VCC= 4.5V
Input high voltage to EA,
RESET
VIH2
0.6VCC
VCC + 0.5
V
VCC= 4.5V
Output low voltage
(ports 1, 2, 3)
VOL
-
0.45
V
VCC= 5.5V, IOL= 1.6mA 1)
Output low voltage
(port 0, ALE, PSEN)
VOL1
-
0.45
V
VCC= 5.5V, IOL= 3.2mA 1)
Output high voltage
(ports 1, 2, 3)
VOH
2.4
0.9VCC
-
V
VCC= 4.5V, IOH= -80µA
VCC= 4.5V, IOH= -10µA
Output high voltage
(port 0 in external bus
mode, ALE, PSEN)
VOH1
2.4
0.9VCC
-
V
VCC= 4.5V, IOH= -800µA 2)
VCC= 4.5V, IOH= -80µA 2)
Logic 0 input current
(ports 1, 2, 3)
IIL
-10
-65
µA
VIN= 0.45V
Logical 1-to-0 transition current (ports 1, 2, 3)
ITL
-65
-650
µA
VIN= 2.0V
Input leakage current
(port 0, EA)
ILI
-
±1
µA
0.45 < VIN < VCC
CIO
-
10
pF
fC= 1MHz
TA= 25°C
Pin capacitance
Power supply current:
Active mode, 4MHz 3)
Idle mode, 4MHz 4)
Active mode, 24 MHz 4)
Idle mode, 24MHz 4)
Active mode, 40 MHz 4)
Idle mode, 40 MHz 4)
Power Down Mode 4)
Jan. 2003 Ver 1.0
ICC
ICC
ICC
ICC
ICC
ICC
IPD
-
8
4
25
10
30
15
50
mA
A
mA
mA
mA
mA
mA
µA
VCC= 5V 4)
VCC= 5V 5)
VCC= 5V 7)
VCC= 5V 8)
VCC= 5V 7)
VCC= 5V 8)
VCC= 5V 6)
25
HMS99C5X Series
1) Capacitive loading on ports 0 and 2 may cause spurious noise pulses to be superimposed on the VOL of ALE and port 3.
The noise is due to external bus capacitance discharging into the port 0 and port 2 pins when these pins make 1-to-0 transitions during bus operation. In the worst case (capacitive loading: > 50pF at 3.3V, > 100pF at 5V), the noise pulse on ALE
line may exceed 0.8V. In such cases it may be desirable to qualify ALE with a schmitt-trigger, or use an address latch with
a schmitt-trigger strobe input.
2) Capacitive loading on ports 0 and 2 may cause the VOH on ALE and PSEN to momentarily fall below the 0.9VCC specification when the address lines are stabilizing.
3) ICC Max at other frequencies is given by:
active mode: ICC = 1.27 × fOSC + 5.73
idle mode:
ICC = 0.28 × fOSC + 1.45 (except OTP devices)
where fOSC is the oscillator frequency in MHz. ICC values are given in mA and measured at VCC = 5V.
4) ICC (active mode) is measured with:
XTAL1 driven with tCLCH, tCHCL = 5ns, VIL = VSS + 0.5V, VIH = VCC - 0.5V; XTAL2 = N.C.;
EA = Port0 = RESET = VCC; all other pins are disconnected. ICC would be slightly higher if a crystal oscillator is used (appr.
1mA).
5) ICC (Idle mode) is measured with all output pins disconnected and with all peripherals disabled;
XTAL1 driven with tCLCH, tCHCL = 5ns, VIL = VSS + 0.5V, VIH = VCC - 0.5V; XTAL2 = N.C.;
RESET = EA = VSS; Port0 = VCC; all other pins are disconnected;
6) IPD (Power Down Mode) is measured under following conditions:
EA = Port0 = VCC; RESET = VSS; XTAL2 = N.C.; XTAL1 = VSS; all other pins are disconnected.
26
Jan. 2003 Ver 1.0
HMS99C5X Series
AC Characteristics
Explanation of the AC Symbols
Each timing symbol has 5 characters. The first character is always a ‘t’ (stand for time). The other characters,
depending on their positions, stand for the name of a signal or the logical status of that signal. The following is
a list of all the characters and what they stand for.
A: Address
C: Clock
D: Input Data
H: Logic level HIGH
I: Instruction (program memory contents)
L: Logic level LOW, or ALE
P: PSEN
Q: Output Data
R: RD signal
T: Time
V: Valid
W: WR signal
X: No longer a valid logic level
Z: Float
For example,
tAVLL = Time from Address Valid to ALE Low
tLLPL = Time from ALE Low to PSEN Low
AC Characteristics for HMS99C5X series (12MHz version)
VCC= 5V :
VCC= 5V + 10%, − 15%; VSS= 0V; TA= -40°C to 85°C
(CL for port 0. ALE and PSEN outputs = 100pF; CL for all other outputs = 80pF)
Variable clock :
Vcc = 5V : 1/tCLCL = 3.5 MHz to 12 MHz
External Program Memory Characteristics
12 MHz Oscillator
Parameter
Symbol
Variable Oscillator
1/tCLCL = 3.5 to 12MHz
Min.
Max.
Min.
Max.
Unit
ALE pulse width
tLHLL
127
-
2tCLCL-40
-
ns
Address setup to ALE
tAVLL
43
-
tCLCL-40
-
ns
Address hold after ALE
tLLAX
30
-
tCLCL-53
-
ns
ALE low to valid instruction in
tLLIV
-
233
-
4tCLCL-100
ns
ALE to PSEN
tLLPL
58
-
tCLCL-25
-
ns
PSEN pulse width
tPLPH
215
-
3tCLCL-35
-
ns
PSEN to valid instruction in
tPLIV
-
150
-
3tCLCL-100
ns
Input instruction hold after PSEN
tPXIX
0
-
0
-
ns
Input instruction float after PSEN
tPXIZ †
-
63
-
tCLCL-20
ns
75
-
tCLCL-8
-
ns
†
Address valid after PSEN
tPXAV
Address to valid instruction in
tAVIV
-
302
-
5tCLCL-115
ns
Address float to PSEN
tAZPL
0
-
0
-
ns
† Interfacing the HMS99C5X series to devices with float times up to 75 ns is permissible. This limited bus contention will not
cause any damage to port 0 Drivers.
Jan. 2003 Ver 1.0
27
HMS99C5X Series
AC Characteristics for HMS99C5X series (12MHz)
External Data Memory Characteristics
12 MHz Oscillator
Parameter
Symbol
Variable Oscillator
1/tCLCL = 3.5 to 12MHz
Min.
Max.
Min.
Max.
Unit
RD pulse width
tRLRH
400
-
6tCLCL-100
-
ns
WR pulse width
tWLWH
400
-
6tCLCL-100
-
ns
Address hold after ALE
tLLAX2
53
-
tCLCL-30
-
ns
RD to valid data in
tRLDV
-
252
-
5tCLCL-165
ns
Data hold after RD
tRHDX
0
-
0
-
ns
Data float after RD
tRHDZ
-
97
-
2tCLCL-70
ns
ALE to valid data in
tLLDV
-
517
-
8tCLCL-150
ns
Address to valid data in
tAVDV
-
585
-
9tCLCL-165
ns
ALE to WR or RD
tLLWL
200
300
3tCLCL-50
3tCLCL+50
ns
Address valid to WR or RD
tAVWL
203
-
4tCLCL-130
-
ns
WR or RD high to ALE high
tWHLH
43
123
tCLCL-40
tCLCL+40
ns
Data valid to WR transition
tQVWX
33
-
tCLCL-50
-
ns
Data setup before WR
tQVWH
433
-
7tCLCL-150
-
ns
Data hold after WR
tWHQX
33
-
tCLCL-50
-
ns
Address float after RD
tRLAZ
-
0
-
0
ns
Advance Information (12MHz)
External Clock Drive
Parameter
Symbol
Variable Oscillator
(Freq. = 3.5 to 12MHz)
Unit
Min.
Max.
Oscillator period (VCC=5V)
tCLCL
83.3
285.7
ns
High time
tCHCX
20
tCLCL - tCLCX
ns
Low time
tCLCX
20
tCLCL - tCHCX
ns
Rise time
tCLCH
-
20
ns
Fall time
tCHCL
-
20
ns
28
Jan. 2003 Ver 1.0
HMS99C5X Series
AC Characteristics for HMS99C5X series (24MHz version)
VCC= 5V + 10%, −15%; VSS= 0V; TA= -40°C to 85°C
(CL for port 0. ALE and PSEN outputs = 100pF; CL for all other outputs = 80pF)
External Program Memory Characteristics
24 MHz Oscillator
Parameter
Symbol
Variable Oscillator
1/tCLCL = 3.5 to 24MHz
Min.
Max.
Min.
Max.
Unit
ALE pulse width
tLHLL
43
-
2tCLCL-40
-
ns
Address setup to ALE
tAVLL
17
-
tCLCL-25
-
ns
Address hold after ALE
tLLAX
17
-
tCLCL-25
-
ns
ALE low to valid instruction in
tLLIV
-
80
-
4tCLCL-87
ns
ALE to PSEN
tLLPL
22
-
tCLCL-20
-
ns
PSEN pulse width
tPLPH
95
-
3tCLCL-30
-
ns
PSEN to valid instruction in
tPLIV
-
60
-
3tCLCL-65
ns
Input instruction hold after PSEN
tPXIX
0
-
0
-
ns
-
32
-
tCLCL-10
ns
37
-
tCLCL-5
-
ns
†
Input instruction float after PSEN
tPXIZ
Address valid after PSEN
tPXAV †
Address to valid instruction in
tAVIV
-
148
-
5tCLCL-60
ns
Address float to PSEN
tAZPL
0
-
0
-
ns
† Interfacing the HMS99C5X series to devices with float times up to 35 ns is permissible. This limited bus contention will not
cause any damage to port 0 Drivers.
Jan. 2003 Ver 1.0
29
HMS99C5X Series
AC Characteristics for HMS99C5X series (24MHz)
External Data Memory Characteristics
24 MHz Oscillator
Parameter
Symbol
Variable Oscillator
1/tCLCL = 3.5 to 24MHz
Min.
Max.
Min.
Max.
Unit
RD pulse width
tRLRH
180
-
6tCLCL-70
-
ns
WR pulse width
tWLWH
180
-
6tCLCL-70
-
ns
Address hold after ALE
tLLAX2
15
-
tCLCL-27
-
ns
RD to valid data in
tRLDV
-
118
-
5tCLCL-90
ns
Data hold after RD
tRHDX
0
-
0
-
ns
Data float after RD
tRHDZ
-
63
-
2tCLCL-20
ns
ALE to valid data in
tLLDV
-
200
-
8tCLCL-133
ns
Address to valid data in
tAVDV
-
220
-
9tCLCL-155
ns
ALE to WR or RD
tLLWL
75
175
3tCLCL-50
3tCLCL+50
ns
Address valid to WR or RD
tAVWL
67
-
4tCLCL-97
-
ns
WR or RD high to ALE high
tWHLH
17
67
tCLCL-25
tCLCL+25
ns
Data valid to WR transition
tQVWX
5
-
tCLCL-37
-
ns
Data setup before WR
tQVWH
170
-
7tCLCL-122
-
ns
Data hold after WR
tWHQX
15
-
tCLCL-27
-
ns
Address float after RD
tRLAZ
-
0
-
0
ns
Advance Information (24MHz)
External Clock Drive
Parameter
Symbol
Variable Oscillator
(Freq. = 3.5 to 24MHz)
Unit
Min.
Max.
Oscillator period
tCLCL
41.7
285.7
ns
High time
tCHCX
12
tCLCL - tCLCX
ns
Low time
tCLCX
12
tCLCL - tCHCX
ns
Rise time
tCLCH
-
12
ns
Fall time
tCHCL
-
12
ns
30
Jan. 2003 Ver 1.0
HMS99C5X Series
AC Characteristics for HMS99C5X series (40MHz version)
VCC= 5V + 10%, − 15%; VSS= 0V; TA= -40°C to 85°C
(CL for port 0. ALE and PSEN outputs = 100pF; CL for all other outputs = 80pF)
External Program Memory Characteristics
40 MHz Oscillator
Parameter
Symbol
Variable Oscillator
1/tCLCL = 3.5 to 40MHz
Min.
Max.
Min.
Max.
Unit
ALE pulse width
tLHLL
40
-
2tCLCL−20
-
ns
Address setup to ALE
tAVLL
10
-
tCLCL−20
-
ns
Address hold after ALE
tLLAX
10
-
tCLCL−20
-
ns
ALE low to valid instruction in
tLLIV
-
56
-
4tCLCL−65
ns
ALE to PSEN
tLLPL
15
-
tCLCL−15
-
ns
PSEN pulse width
tPLPH
80
-
3tCLCL−20
-
ns
PSEN to valid instruction in
tPLIV
-
35
-
3tCLCL−55
ns
Input instruction hold after PSEN
tPXIX
0
-
0
-
ns
-
20
-
tCLCL−10
ns
25
-
tCLCL−5
-
ns
†
Input instruction float after PSEN
tPXIZ
Address valid after PSEN
tPXAV †
Address to valid instruction in
tAVIV
-
91
-
5tCLCL−60
ns
Address float to PSEN
tAZPL
0
-
0
-
ns
† Interfacing the HMS99C5X series to devices with float times up to 20 ns is permissible. This limited bus contention will not
cause any damage to port 0 Drivers.
Jan. 2003 Ver 1.0
31
HMS99C5X Series
AC Characteristics for HMS99C5X series (40MHz)
External Data Memory Characteristics
at 40 MHz Clock
Parameter
Symbol
Variable Clock
1/tCLCL = 3.5 to 40MHz
Min.
Max.
Min.
Max.
Unit
RD pulse width
tRLRH
132
-
6tCLCL-50
-
ns
WR pulse width
tWLWH
132
-
6tCLCL-50
-
ns
Address hold after ALE
tLLAX2
10
-
tCLCL-20
-
ns
RD to valid data in
tRLDV
-
81
-
5tCLCL-70
ns
Data hold after RD
tRHDX
0
-
0
-
ns
Data float after RD
tRHDZ
-
46
-
2tCLCL-15
ns
ALE to valid data in
tLLDV
-
153
-
8tCLCL-90
ns
Address to valid data in
tAVDV
-
183
-
9tCLCL-90
ns
ALE to WR or RD
tLLWL
71
111
3tCLCL-20
3tCLCL+20
ns
Address valid to WR or RD
tAVWL
66
-
4tCLCL-55
-
ns
WR or RD high to ALE high
tWHLH
10
40
tCLCL-20
tCLCL+20
ns
Data valid to WR transition
tQVWX
5
-
tCLCL-25
-
ns
Data setup before WR
tQVWH
142
-
7tCLCL-70
-
ns
Data hold after WR
tWHQX
10
-
tCLCL-20
-
ns
Address float after RD
tRLAZ
-
0
-
0
ns
Advance Information (40MHz)
External Clock Drive
Parameter
Symbol
Variable Oscillator
(Freq. = 3.5 to 40MHz)
Unit
Min.
Max.
Oscillator period
tCLCL
30.3
285.7
ns
High time
tCHCX
11.5
tCLCL - tCLCX
ns
Low time
tCLCX
11.5
tCLCL - tCHCX
ns
Rise time
tCLCH
-
5
ns
Fall time
tCHCL
-
5
ns
32
Jan. 2003 Ver 1.0
HMS99C5X Series
tLHLL
ALE
tLLPL
tAVLL
tPLPH
tLLIV
tPLIV
PSEN
tPXAV
tPXIZ
tPXIX
tAZPL
tLLAX
PORT 0
INSTR.
IN
A0-A7
A0-A7
tAVIV
PORT 2
A8-A15
A8-A15
Figure 6. External Program Memory Read Cycle
Jan. 2003 Ver 1.0
33
HMS99C5X Series
ALE
tLHLL
tWHLH
PSEN
tLLDV
tLLWL
tRLRH
RD
tAVLL
tRHDZ
tRLDV
tLLAX2
tRHDX
tRLAZ
A0-A7 from
RI or DPL
PORT 0
DATA IN
A0-A7 from PCL
INSTR. IN
tAVWL
tAVDV
PORT 2
P2.0-P2.7 or A8-A15 from DPH
A8-A15 from PCH
Figure 7. External Data Memory Read Cycle
ALE
tLHLL
tWHLH
PSEN
tLLWL
tWLWH
WR
tAVLL
PORT 0
tQVWX
tLLAX2
A0-A7 from
RI or DPL
tWHQX
tQVWH
DATA OUT
A0-A7 from PCL
INSTR. IN
tAVWL
PORT 2
P2.0-P2.7 or A8-A15 from DPH
A8-A15 from PCH
Figure 8. External Data Memory Write Cycle
34
Jan. 2003 Ver 1.0
HMS99C5X Series
VCC−0.5V
0.2VCC + 0.9
Test Points
0.2VCC − 0.1
0.45V
AC Inputs during testing are driven at VCC−0.5V for a logic ‘1’ and 0.45V for a logic ‘0’.
Timing measurements are made a VIHmin for a logic ‘1’ and VILmax for a logic ‘0’.
Figure 9. AC Testing: Input, Output Waveforms
VLOAD + 0.1
VOH − 0.1
Timing Reference Points
VLOAD
VLOAD − 0.1
0.2VCC − 0.1
VOL + 0.1
For timing purposes a port pin is no longer floating when a 100mV change from load voltage
occurs and begins to float when a 100mV change from the loaded VOH / VOL level occurs.
IOL / IOH ≥ 20mA.
Figure 10. Float Waveforms
tCLCL
VCC−0.5V
0.45V
0.7 VCC
0.2 VCC −0.1
tCHCX
tCHCL
tCLCX
tCLCH
Figure 11. External Clock Cycle
Jan. 2003 Ver 1.0
35
HMS99C5X Series
OSCILLATOR CIRCUIT
CRYSTAL OSCILLATOR MODE
C2
DRIVING FROM EXTERNAL SOURCE
N.C.
XTAL2
P-LCC-44/Pin 20
P-DIP-40/Pin 18
M-QFP-44/Pin 14
C1
XTAL1
P-LCC-44/Pin 21
P-DIP-40/Pin 19
M-QFP-44/Pin 15
External Oscillator
Signal
XTAL2
P-LCC-44/Pin 20
P-DIP-40/Pin 18
M-QFP-44/Pin 14
XTAL1
P-LCC-44/Pin 21
P-DIP-40/Pin 19
M-QFP-44/Pin 15
C1, C2 = 30pF ±10pF for Crystals
For Ceramic Resonators, contact resonator manufacturer.
Figure 12. Recommended Oscillator Circuits
Oscillation circuit is designed to be used either with a ceramic resonator or crystal oscillator. Since each crystal
and ceramic resonator have their own characteristics, the user should consult the crystal manufacturer for appropriate values of external components.
36
Jan. 2003 Ver 1.0
HMS99C5X Series
Plastic Package P-LCC-44
(Plastic Leaded Chip-Carrier)
44PLCC
UNIT: INCH
0.695
0.685
0.012
0.0075
0.021
0.013
0.032
0.026
0.656
0.650
0.695
0.685
0.050 BSC
0.630
0.590
min. 0.020
0.656
0.650
0.120
0.090
0.180
0.165
Jan. 2003 Ver 1.0
37
HMS99C5X Series
Plastic Package P-DIP-40
(Plastic Dual in-Line Package)
40DIP
UNIT: INCH
0.065
0.045
0.100 BSC
0.140
0.120
0.022
0.015
38
0.600 BSC
min. 0.015
0.200 max.
2.075
2.045
0.550
0.530
0-15°
0.012
0.008
Jan. 2003 Ver 1.0
HMS99C5X Series
Plastic Package P-MPQF-44
(Plastic Metric Quad Flat Package)
44MQFP
13.45
12.95
UNIT: MM
0-7°
0.25
0.10
SEE DETAIL "A"
2.35 max.
0.45
0.30
0.80 BSC
0.23
0.13
2.10
1.95
10.10
9.90
13.45
12.95
10.10
9.90
1.03
0.73
1.60
REF
DETAIL "A"
Jan. 2003 Ver 1.0
39