ETC W741C250

W741C250
4-BIT MICROCONTROLLER
Table of Contents-GENERAL DESCRIPTION .........................................................................................................................2
FEATURES.................................................................................................................................................2
PIN CONFIGURATION ...............................................................................................................................3
PIN DESCRIPTION.....................................................................................................................................4
BLOCK DIAGRAM ......................................................................................................................................5
FUNCTIONAL DESCRIPTION ...................................................................................................................6
ABSOLUTE MAXIMUM RATINGS .............................................................................................................32
DC CHARACTERISTICS............................................................................................................................32
AC CHARACTERISTICS ............................................................................................................................33
PAD ASSIGNMENT & POSITIONS............................................................................................................34
TYPICAL APPLICATION CIRCUIT.............................................................................................................36
INSTRUCTION SET TABLE .......................................................................................................................37
PACKAGE DIMENSIONS...........................................................................................................................85
-1-
Publication Release Date: March 1998
Revision A4
W741C250
GENERAL DESCRIPTION
The W741C250 is a high-performance 4-bit microcontroller (µC) that provides an LCD driver. The
device contains a 4-bit ALU, two 8-bit timers, a divider, a 24 × 4 LCD driver, and five 4-bit I/O ports
(including 1 output port for LED driving). There are also five interrupt sources and 8-level subroutine
nesting for interrupt applications. The W741C250 operates on low voltage and very low current and
has two power reduction modes, hold mode and stop mode, which help to minimize power dissipation.
The W741C250 is suitable for remote controllers, watches and clocks, multiple I/O products,
keyboard controllers, speech synthesis LSI controllers, and other products.
FEATURES
• Operating voltage: 2.2V to 5.5V (LCD drive voltage: 3.0V or 4.5V)
• Operating frequency up to 4 MHz
• Crystal/RC oscillation circuit selectable by code option for system clock
• High-frequency clock (400 KHz to 4 MHz) or low-frequency clock (32.768 KHz) for crystal mode by
code option
• Memory
− 2048 × 16 bit program ROM (including 2K × 4 bit look-up table)
− 128 × 4 bit data RAM (including 16 working registers)
− 24 × 4 LCD data RAM
• 21 input/output pins
− Ports for input only: 2 ports/8 pins
− Input/output ports: 2 ports/8 pins
− Port for output only: 1 port /4 pins (high sink current for LED driving)
− MFP output pin: 1 pin (MFP)
• Power-down mode
− Hold function: no operation (except for oscillator)
− Stop function: no operation (including oscillator)
• Five types of interrupts
− Three internal interrupts (Divider 0, Timer 0, Timer 1)
− Two external interrupts (Port RC and INT pin)
• LCD driver output
− 24 segment × 4 common
− Static, 1/2 duty (1/2 bias), 1/3 duty (1/2 or 1/3 bias), 1/4 duty (1/3 bias) driving mode can be
selected
− LCD driver output pins can be used as DC output port by code option
-2-
W741C250
• MFP output pin
− Output is software selectable as modulating or nonmodulating frequency
− Works as frequency output specified by Timer 1
• Built-in 14-bit clock frequency divider circuit
• Two built-in 8-bit programmable countdown timers
− Timer 0: One of two internal clock frequencies (FOSC/4 or FOSC/1024) can be selected
•
•
•
•
•
− Timer 1: Offers auto-reload function and one of two internal clock frequencies (FOSC or
FOSC/64) can be selected or falling edge of pin RC.0 can be selected (output through MFP pin)
Built-in 18/14-bit watchdog timer selectable for system reset
Powerful instruction set: 116 instructions
8-level subroutine (include interrupt) nesting
Up to 1 µS instruction cycle (with 4 MHz operating frequency)
Packaged in 64-pin QFP
PIN CONFIGURATION
S S S S S
X
R M /
I
A F N
0 P T
V V V E E E E E
/ X O V
D D D D D G G G G G
R
E I U D N N H H D D D 2 2 2 2 1
S N T D C C 1 2 1 2 3 3 2 1 0 9
51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
RA1
52
32
SEG18
RA2
RA3
53
31
SEG17
54
55
30
SEG16
SEG15
RB0
RB1
29
28
56
RB2
RB3
57
58
RC0
RC1
RC2
59
60
61
24
RC3
62
RD0
RD1
63
64
22
21
27
26
25
23
20
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
R R R R R R V N N C C C C S S S S S S
D D E E E E S C C O O O O E E E E E E
2 3 0 1 2 3 S
M M M M G G G G G G
3 2 1 0 0 1 2 3 4 5
-3-
Publication Release Date: March 1998
Revision A4
W741C250
PIN DESCRIPTION
SYMBOL
I/O
FUNCTION
XIN
I
Input pin for oscillator.
Connected to crystal or resistor to generate system clock by code option.
XOUT
O
Output pin for oscillator.
Connected to crystal or resistor to generate system clock by code option.
RA0−RA3
I/O
Input/Output port.
Input/output mode specified by port mode 1 register (PM1).
RB0−RB3
I/O
Input/Output port.
Input/output mode specified by port mode 2 register (PM2).
RC0−RC3
I
4-bit port for input only.
Each pin has an independent interrupt capability.
RD0−RD3
I
4-bit port for input only.
RE0−RE3
O
Output port only.
This port provides high sink current to drive LED.
MFP
O
Output pin only.
This pin can output modulating or nonmodulating frequency, or Timer 1
clock output specified by mode register 1 (MR1).
INT
I
External interrupt pin with pull-high resistor.
RES
I
System reset pin with pull-high resistor.
SEG0−SEG23
O
LCD segment output pins.
Also can be used as DC output ports specified by code option.
COM0−COM3
O
LCD common signal output pins.
COM0
Static
1/2 Duty
1/3 Duty
1/4 Duty
Used
Used
Used
Used
Used
Used
Used
Used
Used
COM1
Not Used
COM2
Not Used
Not Used
COM3
Not Used
Not Used
Not Used
Used
The LCD alternating frequency can be selected by code option.
-4-
W741C250
Pin Description, continued
SYMBOL
I/O
FUNCTION
DH1, DH2
I
Connection terminals for voltage doubler (halver) capacitor.
VDD1,
VDD2,
VDD3
I
Refer to Functional Description.
VDD
I
Positive power supply (+).
VSS
I
Negative power supply (-).
Positive (+) supply voltage terminal.
BLOCK DIAGRAM
SEG0 to SEG23 COM0 to COM3 VDD1 to 3 DH1 to 2
LCD DRIVER
RAM
(128*4)
PORT RA
RA0 to 3
PORT RB
RB0 to 3
PORT RD
RD0 to 3
PORT RC
RC0 to 3
PORT RE
RE0 to 3
ACC
ROM
(2048*16)
ALU
(look_up table
2K*4)
+1(+2)
PC
Central Control
Unit
STACK
(8 Levels)
IEF
HEF
PEF
HCF
EVF
SEF
PSR0
PR
MR1
.
Timer 0
(8 Bit)
Watchdog Timer
(4 Bit)
.
.
Timer 1
(8 Bit)
Modulation
Frequency
Pulse
SEL
MUX
MFP
VDD
VSS
Divider 0
(14 Bit)
Timing Generator
INT
RES
XIN
-5-
XOUT
Publication Release Date: March 1998
Revision A4
W741C250
FUNCTIONAL DESCRIPTION
Program Counter (PC)
Organized as an 11-bit binary counter (PC0 to PC10), the program counter generates the addresses
of the 2048 × 16 on-chip ROM containing the program instruction words. When jump or subroutine
call instructions or interrupt or initial reset conditions are to be executed, the address corresponding to
the instruction will be loaded into the program counter. The format used is shown below.
ITEM
ADDRESS
INTERRUPT PRIORITY
Initial Reset
000H
-
INT 0 (Divider 0)
004H
1st
INT 1 (Timer 0)
008H
2nd
INT 2 (Port RC)
00CH
3rd
INT 4 ( INT pin)
014H
4th
INT 7 (Timer 1)
020H
5th
JP Instruction
XXXH
-
Subroutine Call
XXXH
-
Stack Register (STACK)
The stack register is organized as 11 bits × 8 levels (first-in, last-out). When either a call subroutine or
an interrupt is executed, the program counter will be pushed onto the stack register automatically. At
the end of a call subroutine or an interrupt service subroutine, the RTN instruction must be executed
to pop the contents of the stack register into the program counter. When the stack register is pushed
over the eighth level, the contents of the first level will be lost. In other words, the stack register is
always eight levels deep.
Program Memory (ROM)
The read-only memory (ROM) is used to store program codes; the look-up table is arranged as 2048
× 4 bits. The first three quarters of ROM (000H to 5FFH) are used to store instruction codes only, but
the last quarter (600H to 7FFH) can store both instruction codes and the look-up table. Each look-up
table element is composed of 4 bits, so the look-up table can be addressed up to 2048 elements.
There are two registers (TABL and TABH) to be used in look-up table addressing and they are
controlled by MOV TABH, R and MOV TABL, R instructions. When the instruction MOVC R is
executed, the contents of the look-up table location address specified by TABH, TABL and ACC will
be read and transfered to the data RAM. Refer to the instruction table for more details. The
organization of the program memory is shown in Figure 1.
-6-
W741C250
16 bits
000H
TABH
- x x x
2048
address
TABL
x x x x
ACC
x x y y
Offset
0 1 1 x x x x x
x x x x
ROM address = 600H + Offset/4
600H
3
2
1
0
This area can be used to store both instruction cod
and look-up table
Each element (4 bits) of the look-up table
7FFH
2048 x 16-bit
Figure 1. Program Memory Organization
Data Memory (RAM)
1. Architecture
The static data memory (RAM) used to store data is arranged as 128 × 4 bits. The data memory can
be addressed directly or indirectly. The organization of the data memory is shown in Figure 2.
4 bits
00H
:
0FH
Working Register
128
address
7FH
128 x 4-bit
Figure 2. Data Memory Organization
The first sixteen addresses (00H to 0FH) in the data memory are known as the working registers
(WR). The other data memory is used as general memory and cannot operate directly with immediate
data. The relationship between data memory locations and the page register (PAGE) in indirect
addressing mode is described in the next section.
-7-
Publication Release Date: March 1998
Revision A4
W741C250
2. Page Register (PAGE)
The page register is organized as a 4-bit binary register. The bit descriptions are as follows:
PAGE
3
_
2
1
0
R/W
R/W
R/W
Note: R/W means read/write available.
Bit 3 is reserved.
Bit 2, Bit 1, Bit 0 are indirect addressing mode preselect bits:
000 = Page 0 (00H−0FH)
001 = Page 1 (10H−1FH)
010 = Page 2 (20H−2FH)
011 = Page 3 (30H−3FH)
100 = Page 4 (40H−4FH)
101 = Page 5 (50H−5FH)
110 = Page 6 (60H−6FH)
111 = Page 7 (70H−7FH)
Accumulator (ACC)
The accumulator (ACC) is a 4-bit register used to hold results from the ALU and transfer data
between the memory, I/O ports, and registers.
Arithmetic and Logic Unit (ALU)
This is a circuit which performs arithmetic and logic operations. The ALU provides the following
functions:
• Logic operations: ANL, XRL, ORL
• Branch decisions: JB0, JB1, JB2, JB3, JNZ, JZ, JC, JNC, DSKZ, DSKNZ, SKB0, SKB1, SKB2,
SKB3
• Shift operations: SHRC, RRC, SHLC, RLC
• Binary additions/subtractions: ADC, SBC, ADD, SUB, ADU, DEC, INC
After any of the above instructions are executed, the status of the carry flag (CF) and zero flag (ZF) is
stored in the internal registers. CF can be read out by executing MOVA R, CF.
Clock Generator
The W741C250 provides a crystal or RC oscillation circuit selected by option codes to generate the
system clock through external connections. If a crystal oscillator is used, a crystal or a ceramic
resonator must be connected to XIN and XOUT, and the capacitor must be connected if an accurate
frequency is needed. When a crystal oscillator is used, a high-frequency clock (400 KHz to 4 MHz) or
low-frequency clock (32 KHz) can be selected for the system clock by means of option codes. If the
RC oscillator is used, a resistor in the range of 20 KΩ to 1.6 MΩ must be connected to XIN and
XOUT, as shown in Figure 3. The system clock frequency range is from 32 KHz to 4 MHz. One
machine cycle consists of a four-phase system clock sequence and can run up to 1 µS with a 4 MHz
system clock.
XIN
XIN
Crystal
32 KHz or
400K to 4MHz
or
Resistor
XOUT
XOUT
Figure 3. Oscillator Configuration
-8-
W741C250
Divider 0
Divider 0 is organized as a 14-bit binary up-counter designed to generate periodic interrupts, as
shown in Figure 4. When the system starts, the divider is incremented by each system clock (FOSC).
When an overflow occurs, the divider event flag is set to 1 (EVF.0 = 1). Then, if the divider interrupt
enable flag has been set (IEF.0 = 1), the interrupt is executed, while if the hold release enable flag
has been set (HEF.0 = 1), the hold state is terminated. In addition, the 4 MSB of the divider can be
reset by executing the CLR DIVR0 instruction.
Watchdog Timer (WDT)
The watchdog timer (WDT) is organized as a 4-bit up counter and is designed to protect the program
from unknown errors. The WDT is enable when the corresponding option code bit of the WDT is set
to 1. If the WDT overflows, the chip will be reset. At initial reset, the input clock of the WDT is
FOSC/1024. The input clock of the WDT can be switched to FOSC/16384 (or FOSC/1024) by executing
the SET PMF, #08H (or CLR PMF, #08H) instruction. The contents of the WDT can be reset by the
instruction CLR WDT. In normal operation, the application program must reset WDT before it
overflows. A WDT overflow indicates that the operation is not under control and the chip will be reset.
The WDT minimun overflow period is 468.75 mS when the system clock (FOSC) is 32 KHz and WDT
clock input is FOSC/1024. When the corresponding option code bit of the WDT is set to 0, the WDT
function is disabled. The organization of the Divider0 and watchdog timer is shown in Figure 4.
Fosc
Q1
Q2
Divider0
...Q9 Q10
HEF.0
Q11 Q12 Q13 Q14
R
R
R
R
EVF.0
S
Q
IEF.0
R
Hold mode release (HCF.0)
Divider0 interrupt (INT0)
1. Reset
2. CLR EVF, #01H
3. CLR DIVR0
WDT
PMF.3
Fosc/16384
Fosc/1024
Qw1 Qw2 Qw3 Qw4
R
Enable
/Disable
Mask Option
R
R
Overflow signal
R
System Reset
1. Reset
2. CLR WDT
Figure 4. Organization of Divider 0 and Watchdog Timer
Timer/Counter
1. Timer 0 (TM0)
Timer 0 (TM0) is a programmable 8-bit binary down-counter. The specified value can be loaded into
TM0 by executing the MOV TM0L (TM0H), R or MOV TM0, #I instructions. When the MOV TM0L
(TM0H), R instructions are executed, the TM0 will stop down-counting (if the TM0 is down-counting),
the MR0.3 will be reset to 0, and the specified value is loaded into TM0. If MR0.3 is set to 1, the
event flag 1 (EVF.1) is reset and the TM0 starts to count. When it decrements to FFH, Timer 0 stops
operating and generates an underflow (EVF.1 = 1). The interrupt is executed if the Timer 0 interrupt
enable flag has been set (IEF.1 = 1); and the hold state is terminated if the hold release enable flag 1
has been set (HEF.1 = 1). The Timer 0 clock input can be set as FOSC/1024 or FOSC/4 by setting
-9-
Publication Release Date: March 1998
Revision A4
W741C250
MR0.0 to 1 or by resetting MR0.0 to 0. The default timer value is FOSC/4. The organization of Timer 0
is shown in Figure 5.
If the Timer 0 clock input is FOSC/4:
Desired Timer 0 interval = (preset value +1) × 4 × 1/FOSC
If the Timer 0 clock input is FOSC/1024:
Desired Timer 0 interval = (preset value +1) × 1024 × 1/FOSC
Preset value: Decimal number of Timer 0 preset value
FOSC: Clock oscillation frequency
1. Reset
2. CLR EVF, #02H
3. Reset MR0.3 to 0
4. MOV TM0L, R or MOV TM0H, R
MR0.0
Disable
Fosc/1024
HEF.1
8-bit Binary
Down Counter
(Timer 0)
Fosc/4
Enable
R
Hold mode release (HCF.1)
Q
IEF.1
EVF.1
8
MOV TM0H, R
Timer 0 interrupt (INT1)
4
4
1. Set MR0.3 to 1
2. MOV TM0, #I
S
MOV TM0L, R
1. Reset
2. CLR EVF, #02H
3. Set MR0.3 to 1
4. MOV TM0, #I
MOV TM0, #I
Figure 5. Organization of Timer 0
2. Timer 1 (TM1)
Timer 1 (TM1) is also a programmable 8-bit binary down counter, as shown in Figure 6. Timer 1 can
be used as a counter to count external events or to output an arbitrary frequency to the MFP pin. The
input clock of Timer 1 can be one of three sources: FOSC/64, FOSC, or an external clock from the
RC.0 input pin. The source can be selected by setting bit 0 and bit 1 of mode register 1 (MR1). At
initial reset, the Timer 1 clock input is FOSC. If an external clock is selected as the clock source of
Timer 1, the content of Timer 1 is decreased by 1 at the falling edge of RC.0. When the MOV TM1L,
R or MOV TM1H, R instruction is executed, the specified data are loaded into the auto-reload buffer
and the TM1 down-counting will be disabled (i.e. MR1.3 is reset to 0). If the bit 3 of MR1 is set
(MR1.3 = 1), the contents of the auto-reload buffer will be loaded into the TM1 down counter, Timer 1
starts to down count, and the event flag 7 is reset (EVF.7 = 0). When the MOV TM1, #I instruction is
executed, the event flag 7 (EVF.7) and MR1.3 are reset and the specified value is loaded into autoreload buffer and TM1 by the internal hardware, then the MR1.3 is set, that is the TM1 starts to count
by the hardware. When the timer decrements to FFH, it will generate an underflow (EVF.7 = 1) and
be auto-reloaded with the specified data, after which it will continue to count down. An interrupt is
executed if the interrupt enable flag 7 has been set to 1 (IEF.7 = 1), and the hold state is terminated if
the hold mode release enable flag 7 is set to 1 (HEF.7 = 1). The specified frequency of Timer 1 can
be delivered to the MFP output pin by programming bit 2 of MR1. Bit 3 of MR1 can be used to make
Timer 1 stop or start counting.
- 10 -
W741C250
If the Timer 1 clock input is FT, then:
Desired Timer 1 interval = (preset value +1)/FT
Desired frequency for MFP output pin = FT ÷ (preset value + 1) ÷ 2 (Hz)
Preset value: Decimal number of Timer 1 preset value, and
FOSC: Clock oscillation frequency
MOV TM1, #I
MOV TM1L, R
MOV TM1H, R
8
Underflow
signal
1. MR1.3 = 1
2. MOV TM1, #I
4
4
S
MR1.1
8 bits
Enable
FT
8-bit Binary
Down Counter
(Timer 1)
Fosc/64
2
circuit
Disable
Reset
Set MR1.3 to 1
MOV TM1, #I
Fosc
MR1.0
EVF.7
1. Reset
2. INT 7 accept
3. CLR EVF, #80H
4. Set MR1.3 to 1
5. MOV TM1, #I
Auto-reload buffer
External clock
via RC.0
Q
R
MFP
output pin
Reset
MR1.2
MFP signal
1. MR1.3 = 0
Figure 6. Organization of Timer 1
For example, when FT equals 32768 Hz, depending on the preset value of TM1, the MFP pin will
output a single tone signal in the tone frequency range from 64 Hz to 16384 Hz. The relation between
the tone frequency and the preset value of TM1 is shown in the table below.
3
Tone
frequency
4
TM1 preset value &
MFP frequency
Tone
frequency
5
TM1 preset value &
MFP frequency
Tone
frequency
TM1 preset value &
MFP frequency
C
130.81
7CH
131.07
261.63
3EH
260.06
523.25
1EH
528.51
C#
138.59
75H
138.84
277.18
3AH
277.69
554.37
1CH
564.96
D
146.83
6FH
146.28
293.66
37H
292.57
587.33
1BH
585.14
D#
155.56
68H
156.03
311.13
34H
309.13
622.25
19H
630.15
O
E
164.81
62H
165.49
329.63
31H
327.68
659.26
18H
655.36
F
174.61
5DH
174.30
349.23
2EH
372.36
698.46
16H
712.34
N
F#
185.00
58H
184.09
369.99
2BH
390.09
739.99
15H
744.72
G
196.00
53H
195.04
392.00
29H
420.10
783.99
14H
780.19
G#
207.65
4EH
207.39
415.30
26H
443.81
830.61
13H
819.20
A
220.00
49H
221.40
440.00
24H
442.81
880.00
12H
862.84
A#
233.08
45H
234.05
466.16
22H
468.11
932.23
11H
910.22
B
246.94
41H
248.24
493.88
20H
496.48
987.77
10H
963.76
T
E
Note: Central tone is A4 (440 Hz).
- 11 -
Publication Release Date: March 1998
Revision A4
W741C250
Mode Register 0 (MR0)
Mode Register 0 is organized as a 4-bit binary register (MR0.0 to MR0.3). MR0 can be used to control
the operation of Timer 0. The bit descriptions are as follows:
3
MR0
2
1
W
0
W
Note: W means write only.
Bit 0 = 0 The internal fundamental frequency of Timer 0 is FOSC/4.
= 1 The internal fundamental frequency of Timer 0 is FOSC/1024.
Bit 1
Reserved
Bit 2
Reserved
Bit 3 = 0 Timer 0 stops down-counting.
= 1 Timer 0 starts down-counting.
Mode Register 1 (MR1)
Mode Register 1 is organized as a 4-bit binary register (MR1.0 to MR1.3). MR1 can be used to control
the operation of Timer 1. The bit descriptions are as follows:
MR1
3
2
1
0
W
W
W
W
Note: W means write only.
Bit 0 = 0 The internal fundamental frequency of Timer 1 is FOSC.
= 1 The internal fundamental frequency of Timer 1 is FOSC/64.
Bit 1 = 0 The fundamental frequency source of Timer 1 is the internal clock.
= 1 The fundamental frequency source of Timer 1 is the external clock from RC.0 input pin.
Bit 2 = 0 The specified waveform of the MFP generator is delivered at the MFP output pin.
= 1 The specified frequency of Timer 1 is delivered at the MFP output pin.
Bit 3 = 0 Timer 1 stops down-counting.
= 1 Timer 1 starts down-counting.
Interrupts
The W741C250 provides three internal interrupt sources (Divider 0, Timer 0, Timer 1) and two
external interrupt sources ( INT , port RC). Vector addresses for each of the interrupts are located in
the range of program memory (ROM) addresses 004H to 020H. The flags IEF, PEF, and EVF are
used to control the interrupts. When EVF is set to "1" by hardware and the corresponding bits of IEF
and PEF have been set by software, an interrupt is generated. When an interrupt occurs, all of the
- 12 -
W741C250
interrupts are inhibited until the EN INT or MOV IEF, #I instruction is invoked. The interrupts can also
be disabled by executing the DIS INT instruction. When an interrupt is generated in hold mode, the
hold mode will be released momentarily and the interrupt subroutine will be executed. After the RTN
instruction is executed in an interrupt subroutine, the µC will enter hold mode again. The operation
flow chart is shown in Figure 8. The control diagram is shown below.
Interrupt Event Control Diagram
Divider 0
overflow signal
Timer 0
underflow signal
EN INT
MOV IEF, #I
S
R
S
Q
Q
INT pin
falling edge signal
S
R
S
IEF.0
EVF.1
IEF.1
Q
Q
EVF.2
IEF.2
S
Interrupt
Process
Circuit
Interrupt
Vector
Generator
008H
00CH
014H
020H
IEF.4
Q
R
004H
EVF.4
R
Timer 1
underflow signal
Enable
EVF.0
R
Port RC
signal change
Initial Reset
EVF.7
IEF.7
Initial Reset
Disable
CLR EVF, #I instruction
DIS INT instruction
Figure 7. Interrupt Event Control Diagram
Stop Mode Operation
In stop mode, all operations of the µC cease (including the operation of the oscillator). The µC enters
stop mode when the STOP instruction is executed and exits stop mode when an external trigger is
activated (by a low level on the INT pin or a falling signal on the RC port). When the designated
signal is accepted, the µC awakens and executes the next instruction (if the corresponding bits of IEF
and PEF have been set, It will enter the interrupt service routine after stop mode released). To
prevent erroneous execution, the NOP instruction should follow the STOP command.
Hold Mode Operation
In hold mode, all operations of the µC cease, except for the operation of the oscillator, timer, and
LCD driver. The µC enters hold mode when the HOLD instruction is executed. The hold mode can be
released in one of five ways: by the action of Timer 0, Timer 1, Divider 0, the INT pin, or the RC port.
- 13 -
Publication Release Date: March 1998
Revision A4
W741C250
Before the device enters the hold mode, the HEF, PEF, and IEF flags must be set to define the hold
mode release conditions. For more details, refer to the instruction-set table and the following flow
chart.
Divider 0, Timer 0, Timer 1,
INT, Signal Change on
Port RC
In
HOLD
Mode?
Yes
No
No
Interrupt
Enable?
No
Interrupt
Enable?
Yes
Yes
No
IEF
Flag Set?
No
IEF
Flag Set?
Yes
Yes
Reset EVF.n Flag
Execute
Interrupt Service Routine
Reset EVF.n Flag
Execute
Interrupt Service Routine
HEF
Flag Set?
(Note)
No
Yes
(Note)
Disable interrupt
Disable interrupt
HOLD
PC <- (PC+1)
Note : The bit of EVF corresponding to the interrupt request signal will be reset.
Figure 8. Hold Mode and Interrupt Operation Flow Chart
Hold Mode Release Enable Flag (HEF)
The hold mode release enable flag is organized as an 8-bit binary register (HEF.0 to HEF.7). The
HEF is used to control the hold mode release conditions. It is controlled by the MOV HEF, #I
instruction. The bit descriptions are as follows:
7
HEF
w
6
5
4
3
w
2
1
0
w
w
w
Note: W means write only.
HEF.0 = 1 Overflow from Divider 0 causes hold mode to be released.
HEF.1 = 1 Underflow from Timer 0 causes hold mode to be released.
HEF.2 = 1 Signal change at port RC causes hold mode to be released.
- 14 -
W741C250
HEF.3
Reserved
HEF.4 = 1 Falling edge signal at the INT pin causes hold mode to be released.
HEF.5 & HEF.6 are reserved.
HEF.7 = 1 Underflow from Timer 1 causes hold mode to be released.
Interrupt Enable Flag (IEF)
The interrupt enable flag is organized as an 8-bit binary register (IEF.0 to IEF.7). These bits are used
to control the interrupt conditions. It is controlled by the MOV IEF, #I instruction. When one of these
interrupts is accepted, the corresponding bit of the event flag will be reset, but the other bits are
unaffected. In interrupt subroutine, these interrupts will be disabled till the instruction MOV IEF, #I or
EN INT is executed again. Besides, these interrupts can be disabled by executing DIS INT instruction.
The bit descriptions are as follows:
7
IEF
6
5
4
w
3
w
2
1
0
w
w
w
Note: W means write only.
IEF.0 = 1
IEF.1 = 1
IEF.2 = 1
IEF.3
Interrupt 0 is accepted by overflow from Divider 0.
Interrupt 1 is accepted by underflow from Timer 0.
Interrupt 2 is accepted by a signal change on port RC.
Reserved
IEF.4 = 1 Interrupt 4 is accepted by a falling edge signal on the INT pin.
IEF.5 & IEF.6 are reserved.
IEF.7 = 1 Interrupt 7 is accepted by underflow from Timer 1.
Port Enable Flag (PEF)
The port enable flag is organized as a 4-bit binary register (PEF.0 to PEF.3). Before port RC may be
used to release the hold mode or perform an interrupt function, the content of the PEF must be set
first. The PEF is controlled by the MOV PEF, #I instruction. The bit descriptions are as follows:
PEF
3
2
1
0
w
w
w
w
Note: W means write only.
PEF.0: Enable/disable the signal change on pin RC.0 to release hold mode or perform interrupt.
PEF.1: Enable/disable the signal change on pin RC.1 to release hold mode or perform interrupt.
PEF.2: Enable/disable the signal change on pin RC.2 to release hold mode or perform interrupt.
PEF.3: Enable/disable the signal change on pin RC.3 to release hold mode or perform interrupt.
Stop Mode Wake-up Enable Flag for Port RC (SEF)
The stop mode wake-up flag for port RC is organized as a 4-bit binary register (SEF.0 to SEF.3).
Before port RC may be used to make the device exit the stop mode, the content of the SEF must be
set first. The SEF is controlled by the MOV SEF, #I instruction. The bit descriptions are as follows:
- 15 -
Publication Release Date: March 1998
Revision A4
W741C250
SEF
3
2
1
0
w
w
w
w
Note: W means write only.
SEF 0 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.0.
SEF 1 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.1.
SEF 2 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.2.
SEF 3 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.3.
Hold Mode Release Condition Flag (HCF)
The hold mode release condition flag is organized as an 8-bit binary register (HCF0 to HCF7). It
indicates by which interrupt source the hold mode has been released, and it is loaded by hardware.
The HCF can be read out by the MOVA R, HCFL and MOVA R, HCFH instructions. When any of the
HCF bits is "1," the hold mode will be released and the HOLD instruction is invalid. The HCF can be
reset by the CLR EVF, #I (EVF.n = 0) or MOV HEF, #I (HEF.n = 0) instructions. When EVF or HEF
has been reset, the corresponding bit of HCF is reset simultaneously. The bit descriptions are as
follows:
7
6
HCF
5
4
R
R
3
2
1
0
R
R
R
Note: R means read only.
HCF.0 = 1 Hold mode was released by overflow from Divider 0.
HCF.1 = 1 Hold mode was released by underflow from Timer 0.
HCF.2 = 1 Hold mode was released by a signal change on port RC.
HCF.3
Reservsd
HCF.4 = 1 Hold mode was released by a falling edge signal on the INT pin.
HCF.5 = 1 Hold mode was released by underflow from Timer 1.
HCF.6 & HCF.7 are reserved.
Event Flag (EVF)
The event flag is organized as a 8-bit binary register (EVF0 to EVF7). It is set by hardware and reset
by the CLR EVF, #I instruction or the occurrence of an interrupt. The bit descriptions are as follows:
7
EVF
R
6
5
4
3
R
Note: R means read only.
EVF.0 = 1 Overflow from Divider 0 occurred.
EVF.1 = 1 Underflow from Timer 0 occurred.
EVF.2 = 1 Signal change on port RC occurred.
- 16 -
2
1
0
R
R
R
W741C250
EVF.3
Reserved
EVF.4 = 1 Falling edge signal on the INT pin occurred.
EVF.5 & EVF.6 are reserved.
EVF.7 = 1 Underflow from Timer 1 occurred.
Parameter Flag (PMF)
The parameter flag is organized as a 4-bit binary register (PMF.0 to PMF.3). The PMF is controlled
by the SET PMF, #I or CLR PMF, #I instruction. The bit descriptions are as follows:
3
PMF
2
1
0
W
Note: W means write only.
Bit 0, Bit1, Bit2
Reserved
Bit 3 = 0 The fundamental frequency of the watchdog timer is FOSC/1024.
= 1 The fundamental frequency of the watchdog timer is FOSC/16384.
Port Mode 0 Register (PM0)
The port mode 0 register is organized as a 4-bit binary register (PM0.0 to PM0.3). PM0 can be used
to determine the structure of the input/output ports; it is controlled by the MOV PM0, #I instruction.
The bit descriptions are as follows:
PM0
3
2
1
0
w
w
w
w
Note: W means write only.
Bit 0 = 0 RA port is CMOS output type.
Bit 0 = 1 RA port is NMOS open drain output type.
Bit 1 = 0 RB port is CMOS output type.
Bit 1 = 1 RB port is NMOS open drain output type.
Bit 2 = 0 RC port pull-high resistor is disabled.
Bit 2 = 1 RC port pull-high resistor is enabled.
Bit 3 = 0 RD port pull-high resistor is disabled.
Bit 3 = 1 RD port pull-high resistor is enabled.
Port Mode 1 Register (PM1)
The port mode 1 register is organized as a 4-bit binary register (PM1.0 to PM1.3). PM1 can be used
to control the input/output mode of port RA. PM1 is controlled by the MOV PM1, #I instruction. The bit
descriptions are as follows:
- 17 -
Publication Release Date: March 1998
Revision A4
W741C250
PM1
3
2
1
0
w
w
w
w
Note: W means write only.
Bit 0 = 0 RA.0 works as output pin.
Bit 0 = 1 RA.0 works as input pin.
Bit 1 = 0 RA.1 works as output pin.
Bit 1 = 1 RA.1 works as input pin.
Bit 2 = 0 RA.2 works as output pin.
Bit 2 = 1 RA.2 works as input pin.
Bit 3 = 0 RA.3 works as output pin.
Bit 3 = 1 RA.3 works as input pin.
After initial reset, port RA is in input mode (PM1 = 1111B).
Port Mode 2 Register (PM2)
The port mode 2 register is organized as a 4-bit binary register (PM2.0 to PM2.3). PM2 can be used
to control the input/output mode of port RB. PM2 is controlled by the MOV PM2, #I instruction. The bit
descriptions are as follows:
PM2
3
2
1
0
w
w
w
w
Note: W means write only.
Bit 0 = 0 RB.0 works as output pin.
Bit 0 = 1 RB.0 works as input pin.
Bit 1 = 0 RB.1 works as output pin.
Bit 1 = 1 RB.1 works as input pin.
Bit 2 = 0 RB.2 works as output pin.
Bit 2 = 1 RB.2 works as input pin.
Bit 3 = 0 RB.3 works as output pin.
Bit 3 = 1 RB.3 works as input pin.
After initial reset, port RB is in input mode (PM2 = 1111B).
Reset Function
The W741C250 is reset either by a power-on reset or by using the external RES pin. The initial state
of the W741C250 after the reset function is executed is described below.
Program Counter (PC)
000H
TM0, TM1
Reset
MR0, MR1, PM0, PAGE, PMF registers
Reset
PM1, PM2 registers
Set (1111B)
PSR0 register
Reset
IEF, HEF, HCF, PEF, EVF, SEF flags
Reset
Timer 0 input clock
FOSC/4
Timer 1 input clock
FOSC
MFP output
Low
Input/output ports RA, RB
Input mode
- 18 -
W741C250
Reset Function, continued
Output port RE
High
RA & RB ports output type
CMOS type
RC & RD ports pull-high resistors
Disabled
Input clock of the watchdog timer
FOSC/1024
LCD display
OFF
Segment output mode
LCD drive output
External INT
The external interrupt INT pin contains a pull-up resistor. When the HEF.4 or IEF.4 flag is set, the
falling edge of the INT pin will execute the hold mode release or interrupt subroutine. A low level on
the INT pin will release the stop mode.
Input/Output Ports RA, RB
Port RA consists of pins RA.0 to RA.3 and port RB consists of pins RB.0 to RB.3. After initial reset,
input/output ports RA and RB are both in input mode. When RA and RB are used as output ports,
CMOS or NMOS open drain output type can be selected by the PM0 register. Each pin of port RA or
RB can be specified as input or output mode independently by the PM1 and PM2 registers. The
MOVA R, RA or MOVA R, RB instructions operate the input functions and the MOV RA, R or MOV
RB, R operate the output functions. For more details, refer to the instruction table and Figure 9.
Input/Output Pin of the RA(RB)
VDD
PM0.0 (or PM0.1)
Output
Buffer
DATA
BUS
I/O PIN
RA.n(RB.n)
Enable
MOV RA, R
(or MOV RB, R)
Instruction
PM1.n
(or PM2.n)
Enable
MOVA R, RA
(or MOVA R, RB)
instruction
Figure 9. Architecture of Input/Output Pins
Input Ports RC, RD
Port RC consists of pins RC.0 to RC.3, and port RD consists of pins RD.0 to RD.3. Each pin of port
RC and port RD can be connected to a pull-up resistor, which is controlled by the port mode 0 register
(PM0). When the PEF, HEF, and IEF corresponding to the RC port are set, a signal change on the
specified pins of port RC will execute the hold mode release or interrupt subroutine. Port status
register 0 (PSR0) records the status of ports RC, i.e., any signal changes on the pins that make up
the port. PSR0 can be read out and cleared by the MOV R, PSR0, and CLR PSR0 instructions. In
addition, the falling edge signal on the pin of port RC specified by the instruction MOV SEF, #I will
- 19 -
Publication Release Date: March 1998
Revision A4
W741C250
cause the device to exit the stop mode. Refer to Figure 10 and the instruction table for more details.
The RD port is used as input port only, it has no hold mode release, wake-up stop mode or interrupt
functions.
DATA BUS
PEF.0
PM0.2
D
ck
Signal
change
detector
RC.0
Q
PSR0.0
R
HEF.2
EVF.2
PEF.1
PM0.2
D
ck
Signal
change
detector
RC.1
Q
D
ck
PSR0.1
HCF.2
Q
R
R
IEF.2
INT 2
PEF.2
PM0.2
D
ck
Signal
change
detector
RC.2
Q
PSR0.2
CLR EVF, #I
R
Reset
PEF.3
PM0.2
D
ck
Signal
change
detector
RC.3
Q
PSR0.3
R
Reset
MOV PEF, #I
CLR PSR0
SEF.0
Falling
edge
detector
SEF.1
Falling
edge
detector
Wake up from STOP mode
SEF.2
Falling
edge
detector
SEF.3
Falling
edge
detector
Figure 10. Architecture of Input Ports RC
Output Port RE
When the MOV RE, R instruction is executed, the data in the RAM will be output to port RE.
Port RE (RE.0 to RE.3) also provides high sink current output to drive LEDs.
Port Status Register 0 (PSR0)
Port status register 0 is organized as a 4-bit binary register (PSR0.0 to PSR0.3). PSR0 can be read or
cleared by the MOVA R, PSR0, and CLR PSR0 instructions. The bit descriptions are as follows:
PSR0
3
2
1
0
R
R
R
R
Note: R means read only.
- 20 -
W741C250
Bit 0 = 1
Signal change on RC.0.
Bit 1 = 1
Signal change on RC.1.
Bit 2 = 1
Signal change on RC.2.
Bit 3 = 1
Signal change on RC.3.
MFP Output Pin (MFP)
The MFP output pin can output the Timer 1 clock or the modulation frequency; the output of the pin is
determined by mode register 1 (MR1). The organization of MR1 is shown in Figure 6. When bit 2 of
MR1 is reset to "0," the MFP output can deliver a modulation output in any combination of one signal
from among DC, 4096 Hz, 2048 Hz, and one or more signals from among 128 Hz, 64 Hz, 8 Hz, 4 Hz,
2 Hz, or 1 Hz (when using a 32.768 KHz system clock). The MOV MFP, #I instruction is used to
specify the modulation output combination. The data specified by the 8-bit operand and the MFP
output pin are shown as below:
(FOSC = 32.768 KHz)
R7 R6
0 0
0 1
1 0
R5
R4
R3
R2
R1
R0
FUNCTION
0
0
0
0
0
0
0
0
0
0
0
1
128 Hz
0
0
0
0
1
0
64 Hz
0
0
0
1
0
0
8 Hz
0
0
1
0
0
0
4 Hz
0
1
0
0
0
0
2 Hz
1
0
0
0
0
0
1 Hz
0
0
0
0
0
0
High level
0
0
0
0
0
1
128 Hz
Low level
0
0
0
0
1
0
64 Hz
0
0
0
1
0
0
8 Hz
0
0
1
0
0
0
4 Hz
0
1
0
0
0
0
2 Hz
1
0
0
0
0
0
1 Hz
0
0
0
0
0
0
2048 Hz
0
0
0
0
0
1
2048 Hz * 128 Hz
0
0
0
0
1
0
2048 Hz * 64 Hz
0
0
0
1
0
0
2048 Hz * 8 Hz
0
0
1
0
0
0
2048 Hz * 4 Hz
0
1
0
0
0
0
2048 Hz * 2 Hz
1
0
0
0
0
0
2048 Hz * 1 Hz
- 21 -
Publication Release Date: March 1998
Revision A4
W741C250
( MFP output table, continued)
1 1
0
0
0
0
0
0
4096 Hz
0
0
0
0
0
1
4096 Hz * 128 Hz
0
0
0
0
1
0
4096 Hz * 64 Hz
0
0
0
1
0
0
4096 Hz * 8 Hz
0
0
1
0
0
0
4096 Hz * 4 Hz
0
1
0
0
0
0
4096 Hz * 2 Hz
1
0
0
0
0
0
4096 Hz * 1 Hz
LCD Controller/Driver
The W741C250 can directly drive an LCD with 24 segment output pins and 4 common output pins for
a total of 24 × 4 dots. Option codes can be used to select one of five options for the LCD driving
mode: static, 1/2 bias 1/2 duty, 1/2 bias 1/3 duty, 1/3 bias 1/3 duty, or 1/3 bias 1/4 duty (see Figure
12). The alternating frequency of the LCD can be set as Fw/64, Fw/128, Fw/256, or Fw/512. In
addition, option codes can also be used to set up four of the LCD driver output pins (segment 0 to
segment 23) as a DC output port. The structure of the LCD alternating frequency (FLCD) is shown in
the figure below.
Divider 0
Fosc
Timing
Generator
Q1
Q2
Q3
Q4
Q5
Fw
Q1
Q2
Q14
Fosc/32
High frequency clock
Low frequency clock
...
Q6
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Fw/64
Fw/128
Fw/256
Fw/512
Selector
Figure 11. LCD Alternating Frequency (FLCD) Circuit Diagram
- 22 -
FLCD
W741C250
Data Bus
Option Codes
LCD Frequency
Selection
Fw
Clock
Generator
LCD Data RAM
(24 x 4 bits)
LCD Drive
Mode
Selection
LCD Mode
Controller
MOV LCDM, #
Instruction
LCD Duty & Bias
FLCD
DH1
DH2
LCD Voltage
Controller
VDD
VSS
VDD1 to 3
LCD
Waveform
Common
Driver
Segment
Driver/Controller
SEG0 to 23
COM0 to 3
Figure 12. LCD Driver/Controller Circuit Diagram
When Fw = 32.768 KHz, the LCD frequency is as shown in the table below.
LCD FREQUENCY
STATIC
Fw/512 (64 Hz)
Fw/256 (128 Hz)
Fw/128 (256 Hz)
Fw/64 (512 Hz)
64
128
256
512
1/2 DUTY
1/3 DUTY
1/4 DUTY
32
64
128
256
21
43
85
171
16
32
64
128
Corresponding to the 24 LCD drive output pins, there are 24 LCD data RAM segments (LCDR00 to
LCDR17). Instructions such as MOV LCDR, #I; MOV WR, LCDR; MOV LCDR, WR; and MOV LCDR,
ACC are used to control the LCD data RAM. The data in the LCD data RAM are transferred to the
segment output pins automatically without program control. When the bit value of the LCD data RAM
is "1," the LCD is turned on. When the bit value of the LCD data RAM is "0," the LCD is turned off.
The contents of the LCD data RAM (LCDR) are sent out through the segment 0 to segment 23 pins by
a direct memory access. The relationship between the LCD data RAM and segment/common pins is
shown below.
LCD data RAM
LCDR00
LCDR01
.
.
.
LCDR16
LCDR17
Output pin
SEG0
SEG1
.
.
.
SEG22
SEG23
COM3
COM2
COM1
COM0
bit 3
0/1
0/1
bit 2
0/1
0/1
bit 1
0/1
0/1
bit 0
0/1
0/1
.
.
.
.
.
.
.
.
.
.
.
.
0/1
0/1
0/1
0/1
0/1
0/1
0/1
0/1
- 23 -
Publication Release Date: March 1998
Revision A4
W741C250
The LCDON instruction turns the LCD display on (even in HOLD mode), and the LCDOFF instruction
turns the LCD display off. At initial reset, all the LCD segments are lit. When the initial reset state
ends, the LCD display is turned off automatically. To turn on the LCD display, the instruction LCDON
must be executed. When the drive output pins are used as DC output ports (set by option codes,
please refer the user's manual of ASM741S assembler for more detail), CMOS output type or NMOS
output type can be selected by executing the instruction MOV LCDM, #I. The relation between the
LCD data RAM and segment/common pins is shown below. The data in LCDR00 are transferred to
the corresponding segment output port (SEG3 to SEG0) by a direct memory access. The other LCD
data RAM segments can be used as normal data RAM to store data.
LCD DATA RAM
LCDR00
LCDR03−LCDR01
LCDR04
LCDR07−LCDR05
OUTPUT PIN
BIT 3
BIT 2
BIT 1
BIT 0
SEG3
SEG7
-
SEG2
SEG6
-
SEG1
SEG5
-
SEG0
SEG4
-
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
SEG23−SEG20
-
SEG23
-
SEG22
-
SEG21
-
SEG20
-
SEG3−SEG0
SEG7−SEG4
-
.
.
.
LCDR14
LCDR17−LCDR15
The relationship between the LCD drive mode and the maximum number of drivable LCD segments
is shown below.
LCD DRIVE MODE
MAX. NUMBER OF
DRIVABLE LCD SEGMENTS
CONNECTION AT
POWER INPUT
Static
1/2 bias 1/2 duty
24 (COM1)
48 (COM1−COM2)
Connect VDD3, VDD2 to VDD1
Connect VDD3 to VDD2
1/2 bias 1/3 duty
72 (COM1−COM3)
Connect VDD3 to VDD2
1/3 bias 1/3 duty
72 (COM1−COM3)
-
1/3 bias 1/4 duty
96 (COM1−COM4)
-
LCD Output Mode Type Flag (LCDM)
The LCD output mode type flag is organized as a 6-bit binary register (LCDM.0 to LCDM.5). These
bits are used to control the LCD output pin architecture. When the LCD output pins are set to DC
output mode by option codes, the architecture of these output pins (segment 0 to segment 23) can be
selected as CMOS or NMOS type by the MOV LCDM, #I instruction. The bit descriptions are as
follows:
LCDM
5
4
3
2
1
0
w
w
w
w
w
w
Note: W means write only.
- 24 -
W741C250
LCDM.0 = 0 SEG0 to SEG3 work as CMOS output type.
= 1 SEG0 to SEG3 work as NMOS output type.
LCDM.1 = 0 SEG4 to SEG7 work as CMOS output type.
= 1 SEG4 to SEG7 work as NMOS output type.
LCDM.2 = 0 SEG8 to SEG11 work as CMOS output type.
= 1 SEG8 to SEG11 work as NMOS output type.
LCDM.3 = 0 SEG12 to SEG15 work as CMOS output type.
= 1 SEG12 to SEG15 work as NMOS output type.
LCDM.4 = 0 SEG16 to SEG19 work as CMOS output type.
= 1 SEG16 to SEG19 work as NMOS output type.
LCDM.5 = 0 SEG20 to SEG23 work as CMOS output type.
= 1 SEG20 to SEG23 work as NMOS output type.
The output waveforms for the five LCD driving modes are shown below.
Static Lighting System (Example)
Normal Operating Mode
VDD2
VDD1
VSS
COM0
VDD2
VDD1
VSS
Unlit LCD driver
outputs
VDD2
VDD1
VSS
Lit LCD driver
outputs
- 25 -
Publication Release Date: March 1998
Revision A4
W741C250
1/2 Bias 1/2 Duty Lighting System (Example)
Normal Operating Mode
VDD2
VDD1
VSS
COM0
VDD2
VDD1
VSS
COM1
LCD driver
outputs for
seg. on COM0,
COM1 sides
being unlit
VDD2
VDD1
VSS
LCD driver
outputs for
only seg. on
COM0 side
being lit
VDD2
VDD1
VSS
LCD driver
outputs for
only seg. on
COM1 side
being lit
VDD2
VDD1
VSS
LCD driver
outputs for
seg. on COM0,
COM1 sides
being lit
VDD2
VDD1
VSS
- 26 -
W741C250
1/2 Bias 1/3 Duty Lighting System (Example)
Normal Operating Mode
VDD2
VDD1
VSS
COM0
COM1
VDD2
VDD1
VSS
COM2
VDD2
VDD1
VSS
VDD2
VDD1
VSS
LCD driver
outputs for all
seg. on COM0,1,2
sides being unlit
LCD driver
outputs for only
seg. on COM0
side being lit
VDD2
VDD1
VSS
LCD driver
outputs for only
seg. on COM1
side being lit
VDD2
VDD1
VSS
LCD driver
outputs for only
seg. on COM0,1
sides being lit
VDD2
VDD1
VSS
LCD driver
outputs for only
seg. on COM2
side being lit
VDD2
VDD1
VSS
LCD driver
outputs for only
seg. on COM0,2
sides being lit
VDD2
VDD1
VSS
- 27 -
Publication Release Date: March 1998
Revision A4
W741C250
1/3 Bias 1/3 Duty Lighting System (Example)
Normal Operating Mode
VDD3
VDD2
VDD1
VSS
COM0
VDD3
VDD2
VDD1
VSS
COM1
VDD3
VDD2
VDD1
VSS
COM2
VDD3
VDD2
VDD1
VSS
LCD driver
outputs for all
seg. on COM0,1,2
sides being unlit
LCD driver
outputs for only
seg. on COM0
side being lit
VDD3
VDD2
VDD1
VSS
LCD driver
outputs for only
seg. on COM1
side being lit
VDD3
VDD2
VDD1
VSS
LCD driver
outputs for seg.
on COM0,2
sides being lit
VDD3
VDD2
VDD1
VSS
LCD driver
outputs for seg.
on COM1,2
sides being lit
VDD3
VDD2
VDD1
VSS
LCD driver
outputs for seg.
on COM0,1,2
sides being lit
VDD3
VDD2
VDD1
VSS
- 28 -
W741C250
1/3 Bias 1/4 Duty Lighting System (Example)
Normal Operating Mode
VDD3
VDD2
VDD1
VSS
COM0
VDD3
VDD2
VDD1
VSS
COM1
VDD3
VDD2
VDD1
VSS
COM2
VDD3
VDD2
VDD1
VSS
COM3
LCD driver
outputs for
only seg. on
COM0 side
being lit
VDD3
VDD2
VDD1
VSS
LCD driver
outputs for
only seg. on
COM1 side
being lit
VDD3
VDD2
VDD1
VSS
LCD driver
outputs for
seg. on COM0,
COM1 sides
being lit
VDD3
VDD2
VDD1
VSS
LCD driver
outputs for
seg. on COM1,
COM2,3 sides
being lit
VDD3
VDD2
VDD1
VSS
- 29 -
Publication Release Date: March 1998
Revision A4
W741C250
1/3 Bias 1/4 Duty Normal Lighting System, continued
LCD driver
outputs for
seg. on COM1
COM2 sides
being lit
VDD3
VDD2
VDD1
VSS
LCD driver
outputs for
seg. on COM0
COM2,3 sides
being lit
VDD3
VDD2
VDD1
VSS
LCD driver
outputs for
seg. on COM0
COM1,2,3 sides
being lit
VDD3
VDD2
VDD1
VSS
The power connections for each LCD driving mode, which are determined by a mask option, are
shown below.
1/2 Bias LCD Configuration
Static LCD Configuration
DH1
DH1
0.1uF
DH1, DH2 floating
DH2
DH2
VSS
C
H
I
P
VSS
VDD
VDD
C
H
I
P
VDD
VDD
0.1uF
VDD1
VDD1
VDD2
VDD2
VDD3
VDD3
VDD1 = 1/2 VDD, VDD2 = VDD3 = VDD
VDD1 = VDD2 = VDD3 = VDD
- 30 -
W741C250
LCD Configuration, continued
1/3 Bias LCD Configuration
DH1
0.1uF
DH2
VSS
C
H
I
P
VDD
VDD
0.1uF
VDD1
VDD2
VDD3
VDD1 = 1/2 VDD, VDD2 = VDD, VDD3 = 3/2 VDD
1/3 Bias LCD Configuration
DH1
0.1uF
DH2
VSS
C
H
I
P
VDD
VDD
0.1uF
VDD1
VDD2
VDD3
VDD1 = 1/3 VDD, VDD2 = 2/3 VDD, VDD3 = VDD
- 31 -
Publication Release Date: March 1998
Revision A4
W741C250
ABSOLUTE MAXIMUM RATINGS
PARAMETER
RATING
UNIT
Supply Voltage to Ground Potential
-0.3 to +7.0
V
Applied Input/Output Voltage
-0.3 to +7.0
V
120
mW
0 to +70
°C
-55 to +150
°C
Power Dissipation
Ambient Operating Temperature
Storage Temperature
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability
of the device.
DC CHARACTERISTICS
(VDD−VSS = 3.0V, FOSC. = 32.768 KHz, TA = 25° C; unless otherwise specified)
PARAMETER
SYM.
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Op. Voltage
VDD
-
2.2
-
5.5
V
Op. Current (Crystal type)
IOP1
No load (Ext-V)
-
8
20
µA
Op. Current (RC type)
IOP2
No load (Ext-V)
-
35
65
µA
Hold Current (Crystal type)
IHM1
Hold mode
No load (Ext-V)
-
4
6
µA
Hold Current (RC type)
IHM2
Hold mode
No load (Ext-V)
-
16
40
µA
Stop Current (Crystal type)
ISM1
Stop mode
No load (Ext-V)
-
0.1
2
µA
Stop Current (RC type)
ISM2
Stop mode
No load (Ext-V)
-
0.1
2
µA
Input Low Voltage
VIL
-
VSS
-
0.3 VDD
V
Input High Voltage
VIH
-
0.7 VDD
-
VDD
V
MFP Output Low Voltage
VML
IOL = 3.5 mA
-
-
0.4
V
MFP Output High Voltage
VMH
IOH = -3.5 mA
2.4
-
-
V
Port RA, RB Output Low Voltage
VABL
IOL = 2.0 mA
-
-
0.4
V
Port RA, RB Output high Voltage
VABH
IOH = -2.0 mA
2.4
-
-
V
LCD Supply Current
ILCD
All Seg. On
-
-
10
µA
SEG0−SEG23 Sink Current
(work as LCD output pins)
IOL
VOL = 0.4V
VLCD = 0.0V
0.4
-
-
µA
SEG0−SEG23 Drive Current
(work as LCD output pins)
IOH
VOH = 2.4V
VLCD = 3.0V
0.3
-
-
µA
- 32 -
W741C250
DC Characteristics, continued
PARAMETER
SYM.
SEG0−SEG23 Output Low
Voltage (work as DC output pins)
VSL
SEG0−SEG23 Output High
Voltage (work as DC output pins)
CONDITIONS
MIN.
TYP.
MAX.
UNIT
IOL = 0.6 mA
-
-
0.4
V
VSH
IOH = -0.3 µA
2.4
-
-
V
Port RE Sink Current
IEL
VOL = 0.9V
9
-
-
mA
Port RE Source Current
IEH
VOH = 2.4V
0.4
1.2
-
mA
Input Port Pull-up Resistor
RCD
Port RC, RD
100
350
1000
KΩ
INT Pull-up Resistor
RINT
-
50
250
1000
KΩ
RES Pull-up Resistor
RRES
-
20
100
500
KΩ
MIN.
TYP.
MAX.
UNIT
RC type
-
-
4000
Crystal type 1 (Option
low-speed type)
-
32.768
-
Crystal type 2 (Option
high-speed type)
400
-
4190
AC CHARACTERISTICS
(VDD−VSS = 3.0V, TA = 25° C; unless otherwise specified)
PARAMETER
Op. Frequency
SYM.
FOSC
CONDITIONS
KHz
Frequency Deviation by
Voltage Drop for RC
Oscillator
∆f
f
f(3V) − f(2.4V)
f(3V)
-
-
10
%
Instruction Cycle Time
TI
One machine cycle
-
4/FOSC
-
mS
Reset Active Width
TRAW
FOSC = 32.768 KHz
1
-
-
µS
Interrupt Active Width
TIAW
FOSC = 32.768 KHz
1
-
-
µS
- 33 -
Publication Release Date: March 1998
Revision A4
W741C250
PAD ASSIGNMENT & POSITIONS
2810 µm
1
60 59 58 57 56 55 54 53 52 51 50 49 48 47
2
46
3
45
44
4
5
6
43
42
Y
7
8
3020 µm
41
40
X
(0,0)
9
39
10
11
12
38
13
14
35
15
33
37
36
34
16
32
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Note: The chip substrate must be connected to system ground (VSS).
PAD NO.
PAD NAME
X
1
RD2
-912.10
2
RD3
3
Y
PAD NO.
PAD NAME
X
1297.50
11
COM0
-1209.00
-414.00
-1209.00
756.00
12
SEG0
-1209.00
-544.00
RE0
-1209.00
626.00
13
SEG1
-1209.00
-674.00
4
RE1
-1209.00
496.00
14
SEG2
-1209.00
-804.00
5
RE2
-1209.00
366.00
15
SEG3
-1209.00
-934.00
6
RE3
-1209.00
236.00
16
SEG4
-1209.00
-1064.00
7
VSS
-1209.00
106.00
17
SEG5
-912.10
-1314.00
8
COM3
-1209.00
-24.00
18
SEG6
-782.10
-1314.00
9
COM2
-1209.00
-154.00
19
SEG7
-652.10
-1314.00
10
COM1
-1209.00
-284.00
20
SEG8
-522.10
-1314.00
- 34 -
Y
W741C250
Pad positions, continued
PAD NO.
PAD NAME
X
21
SEG9
-392.10
22
SEG10
23
Y
PAD NO.
PAD NAME
X
Y
-1314.00
41
VDD
1201.50
106.00
-262.10
-1314.00
42
XOUT
1201.50
236.00
SEG11
-132.10
-1314.00
43
XIN
1201.50
366.00
24
SEG12
-2.10
-1314.00
44
RES
1201.50
496.00
25
SEG13
127.90
-1314.00
45
INT
1201.50
626.00
26
SEG14
257.90
-1314.00
46
MFP
1201.50
756.00
27
SEG15
387.90
-1314.00
47
RA0
907.90
1297.50
28
SEG16
517.90
-1314.00
48
RA1
777.90
1297.50
29
SEG17
647.90
-1314.00
49
RA2
647.90
1297.50
30
SEG18
777.90
-1314.00
50
RA3
517.90
1297.50
31
SEG19
907.90
-1314.00
51
RB0
387.90
1297.50
32
SEG20
1201.50
-1064.00
52
RB1
257.90
1297.50
33
SEG21
1201.50
-934.00
53
RB2
127.90
1297.50
34
SEG22
1201.50
-804.00
54
RB3
-2.10
1297.50
35
SEG23
1201.50
-674.00
55
RC0
-132.10
1297.50
36
VDD3
1201.50
-544.00
56
RC1
-262.10
1297.50
37
VDD2
1201.50
-414.00
57
RC2
-392.10
1297.50
38
VDD1
1201.50
-284.00
58
RC3
-522.10
1297.50
39
DH2
1201.50
-154.00
59
RD0
-652.10
1297.50
40
DH1
1201.50
-24.00
60
RD1
-782.10
1297.50
- 35 -
Publication Release Date: March 1998
Revision A4
W741C250
TYPICAL APPLICATION CIRCUIT
Vcc
VDD
COM0
RA0
Output Signal
RA3
COM3
SEG0
RB0
RB1
RB2
RB3
LCD
PANEL
(1/3 Bias
1/4 Duty)
SEG23
DH1
RC0
RC1
RC2
RC3
DH2
VDD1
VDD2
VDD3
RD0
Connect to capacitor and VDD
to generate LCD voltage
Vcc
RD1
RD2
RD3
INT
RE0
RES
RE1
RE2
XOUT
RE3
or
MFP
XIN
VSS
- 36 -
Vcc
W741C250
INSTRUCTION SET TABLE
Symbol Description
ACC:
Accumulator
ACC.n:
Accumulator bit n
WR:
Working Register
PAGE:
Page Register
MR1:
Mode Register 1
PM0:
Port Mode 0
PM1:
Port Mode 1
PM2:
Port Mode 2
PSR0:
Port Status Register 0
R:
Memory (RAM) of address R
LCDR:
LCD data RAM of address LDR
R.n:
Memory bit n of address R
I:
Constant parameter
L:
Branch or jump address
CF:
Carry Flag
ZF:
Zero Flag
PC:
Program Counter
TM0:
Timer 0
TM1:
Timer 1
IEF.n:
Interrupt Enable Flag n
HCF.n:
HOLD mode release Condition Flag n
HEF.n:
HOLD mode release Enable Flag n
SEF.n:
STOP mode wake-up Enable Flag n
PEF.n:
Port Enable Flag n
EVFn:
Event Flag n
BF:
Backup Flag
! =:
Not equal
&:
AND
^:
OR
- 37 -
Publication Release Date: March 1998
Revision A4
W741C250
Symbol Description, continued
EX:
Exclusive OR
←:
Transfer direction, result
[PAGE*10H+()]: Contents of address PAGE(bit2, bit1, bit0)*10H+()
[P()]:
Contents of port P()
INSTRUCTION SET TABLE 1
MNEMONIC
FUNCTION
FLAG
AFFECTED
CYCLE
Arithmetic
ADD
R, ACC
ACC←(R) + (ACC)
ZF, CF
1
ADD
WR, #I
ACC←(WR) + I
ZF, CF
1
ADDR
R, ACC
ACC, R←(R) + (ACC)
ZF, CF
1
ADDR
WR, #I
ACC, WR←(WR) + I
ZF, CF
1
ADC
R, ACC
ACC←(R) + (ACC) + (CF)
ZF, CF
1
ADC
WR, #I
ACC←(WR) + I + (CF)
ZF, CF
1
ADCR
R, ACC
ACC, R←(R) + (ACC) + (CF)
ZF, CF
1
ADCR
WR, #I
ACC, WR←(WR) + I + (CF)
ZF, CF
1
ADU
R, ACC
ACC←(R) + (ACC)
ZF
1
ADU
WR, #I
ACC←(WR) + I
ZF
1
ADUR
R, ACC
ACC, R←(R) + (ACC)
ZF
1
ADUR
WR, #I
ACC, W R←(WR) + I
ZF
1
SUB
R, ACC
ACC←(R) - (ACC)
ZF, CF
1
SUB
WR, #I
ACC←(WR) - I
ZF, CF
1
SUBR
R, ACC
ACC, R←(R) - (ACC)
ZF, CF
1
SUBR
WR, #I
ACC, WR←(WR) - I
ZF, CF
1
SBC
R, ACC
ACC←(R) - (ACC) - (CF)
ZF, CF
1
SBC
WR, #I
ACC←(WR) - I - (CF)
ZF, CF
1
SBCR
R, ACC
ACC, R←(R) - (ACC) - (CF)
ZF, CF
1
SBCR
WR, #I
ACC, WR←(WR) - I - (CF)
ZF, CF
1
INC
R
ACC, R←(R) + 1
ZF, CF
1
DEC
R
ACC, R←(R) - 1
ZF, CF
1
- 38 -
W741C250
Instruction Set Table 1, continued
MNEMONIC
FUNCTION
FLAG
AFFECTED
CYCLE
Logic Operations
ANL
R, ACC
ACC←(R) & (ACC)
ZF
1
ANL
WR, #I
ACC←(WR) & I
ZF
1
ANLR
R, ACC
ACC, R←(R) & (ACC)
ZF
1
ANLR
WR, R #I
ACC, WR←(WR) & I
ZF
1
ORL
R, ACC
ACC←(R) ∧ (ACC)
ZF
1
ORL
WR, #I
ACC←(WR) ∧ I
ZF
1
ORLR
R, ACC
ACC, R←(R) ∧ (ACC)
ZF
1
ORLR
WR, #I
ACC, WR←(WR) ∧ I
ZF
1
XRL
R, ACC
ACC←(R) EX (ACC)
ZF
1
XRL
WR, #I
ACC←(WR) EX I
ZF
1
XRLR
R, ACC
ACC, R←(R) EX (ACC)
ZF
1
XRLR
WR, #I
ACC, WR←(WR) EX I
ZF
1
JMP
L
PC10−PC0←L10−L0
1
JB0
L
PC10−PC0←L10−L0; if ACC.0 = "1"
1
JB1
L
PC10−PC0←L10−L0; if ACC.1 = "1"
1
JB2
L
PC10−PC0←L10−L0; if ACC.2 = "1"
1
JB3
L
PC10−PC0←L10−L0; if ACC.3 = "1"
1
JZ
L
PC10−PC0←L10−L0; if ACC = 0
1
JNZ
L
PC10−PC0←L10−L0; if ACC ! = 0
1
JC
L
PC10−PC0←L10−L0; if CF = "1"
1
JNC
L
PC10−PC0←L10−L0; if CF ! = "1"
1
DSKZ
R
ACC, R←(R) - 1; skip if ACC = 0
ZF, CF
1
DSKNZ
R
ACC, R←(R) - 1; skip if ACC ! = 0
ZF, CF
1
SKB0
R
Skip if R.0 = "1"
1
SKB1
R
Skip if R.1 = "1"
1
SKB2
R
Skip if R.2 = "1"
1
SKB3
R
Skip if R.3 = "1"
1
Branch
- 39 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 1, continued
MNEMONIC
FUNCTION
FLAG
AFFECTED
CYCLE
Data Move
MOV
WR, R
WR←(R)
1
MOV
R, WR
R←(WR)
1
MOVA
WR, R
ACC, WR←(R)
ZF
1
MOVA
R, WR
ACC, R←(WR)
ZF
1
MOV
R, ACC
R←(ACC)
MOV
ACC, R
ACC←(R)
MOV
R, #I
R←I
1
MOV
WR, @R
WR←[PR (bit2, bit1, bit0) × 10H + (R)]
2
MOV
@R, WR
[PR (bit2, bit1, bit0) × 10H +(R)]←WR
2
MOV
TABH, R
TAB High addresss ← R
1
MOV
TABL, R
TAB Low addresss ← R
1
MOVC
R
R←[ TAB × 10H + (ACC)]
2
MOVC
WR, #I
WR ← [(I6 ~ I0) × 10H + (ACC)]
2
1
ZF
1
Input & Output
MOVA
R, RA
ACC, R←[RA]
ZF
1
MOVA
R, RB
ACC, R←[RB]
ZF
1
MOVA
R, RC
ACC, R←[RC]
ZF
1
MOVA
R, RD
ACC, R←[RD]
ZF
1
MOV
RA, R
[RA]←(R)
1
MOV
RB, R
[RB]←(R)
1
MOV
RE, R
[RT]←(R)
1
MOV
MFP, #I
[MFP]← I
1
Flag & Register
MOVA
R, PAGE
ACC, R←PAGE (Page Register)
MOV
PAGE, R
PAGE←(R)
1
MOV
PAGE, #I
PAGE←I
1
MOV
MR0, #I
MR0←I
1
MOV
MR1, #I
MR1←I
1
- 40 -
ZF
1
W741C250
Instruction Set Table 1, continued
MNEMONIC
FUNCTION
FLAG
AFFECTED
CYCLE
MOVA
R, CF
ACC.0, R.0←CF
ZF
1
MOV
CF, R
CF←(R.0)
CF
1
MOVA
R, HCFL
ACC, R←HCF0−HCF3
ZF
1
MOVA
R, HCFH
ACC, R←HCF4−HCF7
ZF
1
CLR
PMF, #I
Clear Parameter Flag if In = 1
1
SET
PMF, #I
Set Parameter Flag if In = 1
1
MOV
PM0, #I
Port Mode 0← I
1
MOV
PM1, #I
Port Mode 1← I
1
MOV
PM2, #I
Port Mode 2← I
1
CLR
EVF, #I
Clear Event Flag if In = 1
1
MOV
PEF, #I
Set/Reset Port Enable Flag
1
MOV
IEF, #I
Set/Reset Interrupt Enable Flag
1
MOV
HEF, #I
Set/Reset HOLD mode release Enable Flag
1
MOV
SEF, #I
Set/Reset STOP mode wake-up Enable Flag
for RC port
1
MOVA
R, PSR0
ACC, R←Port Status Register 0
CLR
PSR0
Clear Port Status Register 0
SET
CF
Set Carry Flag
CF
1
CLR
CF
Clear Carry Flag
CF
1
CLR
DIVR0
Clear last 4 bits of Divider 0
1
CLR
WDT
Clear Watchdog Timer
1
ZF
1
1
Shift & Rotate
SHRC
R
ACC.n, R.n←(R.n+1);
ZF, CF
1
ZF, CF
1
ZF, CF
1
ZF, CF
1
ACC.3, R.3←0; CF←R.0
RRC
R
ACC.n, R.n←(R.n+1);
ACC.3, R.3←CF; CF←R.0
SHLC
R
ACC.n, R.n←(R.n-1);
ACC.0, R.0←0; CF←R.3
RLC
R
ACC.n, R.n←(R.n-1);
ACC.0, R.0←CF; CF←R.3
- 41 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 1, continued
MNEMONIC
FUNCTION
FLAG
AFFECTED
CYCLE
LCD
MOV
LCDR, #I
LCDR← I
1
MOV
WR, LCDR
WR←(LCDR)
1
MOV
LCDR, WR
LCDR←(WR)
1
MOV
LCDR, ACC
LCDR←(ACC)
1
MOV
LCDM, #I
Select LCD output mode type
1
LCDON
LCD ON
1
LCDOFF
LCD OFF
1
Timer
MOV
TM0H, R
Timer 0 High register ← R
1
MOV
TM0L, R
Timer 0 Low register ← R
1
MOV
TM0, #I
Timer 0 set
1
MOV
TM1H, R
Timer 1 High register ← R
1
MOV
TM1L, R
Timer 1 Low register ← R
1
MOV
TM1, #I
Timer 1 set
1
L
STACK ← (PC)+1;
PC10−PC0 ← L10−L0
1
(PC)←STACK
1
HOLD
Enter Hold mode
1
STOP
Enter Stop mode
1
NOP
No Operation
1
Subroutine
CALL
RTN
Other
EN
INT
Enable Interrupt Function
1
DIS
INT
Disable Interrupt Function
1
- 42 -
W741C250
INSTRUCTION SET TABLE 2
ADC
R, ACC
Add R to ACC with CF
Machine Code:
0
0
0
0
1
0
0
0
0
R6
R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC ← (R) + (ACC) + (CF)
Description:
The contents of the data memory location addressed by R6 to R0, ACC,
and CF are binary added and the result is loaded into the ACC.
Flag Affected:
CF & ZF
ADC
Add immediate data to WR with CF
WR, #I
Machine Code:
0
0
0
0
1
1
0
0
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC ← (WR) + I + (CF)
Description:
The contents of the Working Register (WR), I, and CF are binary added
and the result is loaded into the ACC.
Flag Affected:
CF & ZF
ADCR R, ACC
Add R to ACC with CF
Machine Code:
0
0
0
0
1
0
0
1
0
R6
R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) + (ACC) + (CF)
Description:
The contents of the data memory location addressed by R6 to R0, ACC,
and CF are binary added and the result is placed in the ACC and the data
memory.
Flag Affected:
CF & ZF
- 43 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
ADCR
WR, #I
Add immediate data to WR with CF
Machine Code:
0
0
0
0
1
1
0
1
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC, WR ← (WR) + I + (CF)
Description:
The contents of the Working Register (WR), I, CF are binary added and the
result is placed in the ACC and the WR.
Flag Affected:
CF & ZF
ADD
Add R to ACC
R, ACC
Machine Code:
0
0
0
1
1
0
0
0
0
R6
R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC ← (R) + (ACC)
Description:
The contents of the data memory location addressed by R6 to R0 and ACC
are binary added and the result is loaded into the ACC.
Flag Affected:
CF & ZF
ADD
Add immediate data to WR
WR, #I
Machine Code:
0
0
0
1
1
1
0
0
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC ← (WR) + I
Description:
The contents of the Working Register (WR) and the immediate data I are
binary added and the result is loaded into the ACC.
Flag Affected:
CF & ZF
- 44 -
W741C250
Instruction Set Table 2, continued
ADDR R, ACC
Add R to ACC
Machine Code:
0
0
0
1
1
0
0
1
0
R6
R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) + (ACC)
Description:
The contents of the data memory location addressed by R6 to R0 and ACC
are binary added and the result is placed in the ACC and the data memory.
Flag Affected:
CF & ZF
ADDR
Add immediate data to WR
WR, #I
Machine Code:
0
0
0
1
1
1
0
1
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC, WR ← (WR) + I
Description:
The contents of the Working Register (WR) and the immediate data I are
binary added and the result is placed in the ACC and the WR.
Flag Affected:
CF & ZF
ADU
Add R to ACC and Carry Flag unchanged
R, ACC
Machine Code:
0
0
1
0
1
0
0
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC ← (R) + (ACC)
Description:
The contents of the data memory location addressed by R6 to R0 and ACC
are binary added and the result is loaded into the ACC.
Flag Affected:
ZF
- 45 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
ADU
WR, #I
Add immediate data to WR and Carry Flag unchanged
0
Machine Code:
0
1
0
1
1
0
0
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC ← (WR) + I
Description:
The contents of the Working Register (WR) and the immediate data I are
binary added and the result is loaded into the ACC.
Flag Affected:
ADUR R, ACC
ZF
Add R to ACC and Carry Flag unchanged
Machine Code:
0
0
1
0
1
0
0
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) + (ACC)
Description:
The contents of the data memory location addressed by R6 to R0 and ACC
are binary added and the result is placed in the ACC and the data memory.
Flag Affected:
ZF
ADUR
Add immediate data to WR and Carry Flag unchanged
WR, #I
Machine Code:
0
0
1
0
1
1
0
1
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC, WR ← (WR) + I
Description:
The contents of the Working Register (WR) and the immediate data I are
binary added and the result is placed in the WR and the ACC.
Flag Affected:
ZF
- 46 -
W741C250
Instruction Set Table 2, continued
ANL
R, ACC
And R to ACC
Machine Code:
0
0
1
0
1
0
1
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC ← (R) & (ACC)
Description:
The contents of the data memory location addressed by R6 to R0 and the
ACC are ANDed and the result is loaded into the ACC.
Flag Affected:
ZF
ANL
And immediate data to WR
WR, #I
Machine Code:
0
0
1
0
1
1
1
0
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC ← (WR) & I
Description:
The contents of the Working Register (WR) and the immediate data I are
ANDed and the result is loaded into the ACC.
Flag Affected:
ZF
ANLR R, ACC
And R to ACC
Machine Code:
0
0
1
0
1
0
1
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) & (ACC)
Description:
The contents of the data memory location addressed by R6 to R0 and the
ACC are ANDed and the result is placed in the data memory and the ACC.
Flag Affected:
ZF
- 47 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
ANLR
WR, #I
And immediate data to WR
Machine Code:
0
0
1
0
1
1
1
1
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC, WR ← (WR) & I
Description:
The contents of the Working Register (WR) and the immediate data I are
ANDed and the result is placed in the WR and the ACC.
Flag Affected:
ZF
CALL
Call subroutine
L
Machine Code:
0
1
1
0
0
Machine Cycle:
1
Operation:
STACK ← (PC)+1;
L10
L9
L8
L7
L6
L5
L4
L3
L2
L1
L0
PC10−PC0 ← L10−L0
Description:
The next program counter (PC10 to PC0) is saved in the STACK and then
the direct address (L10 to L0) is loaded into the program counter.
A subroutine is called.
CLR
CF
Clear CF
Machine Code:
0
1
0
1
0
0
Machine Cycle:
1
Operation:
Clear CF
Description:
Clear Carry Flag to 0.
Flag Affected:
CF
0
0
- 48 -
0
0
0
0
0
0
0
0
W741C250
Instruction Set Table 2, continued
CLR
DIVR0
Reset the last 4 bits of the DIVideR0
Machine Code:
0
0
0
1
0
1
1
1
0
0
0
0
0
0
0
0
Machine Cycle:
1
Operation:
Reset the last 4 bits of Divider 0
Description:
When this instruction is executed, the last 4 bits of Divider 0 (14 bits) are
reset.
CLR
Clear EVent Flag
EVF, #I
Machine Code:
0
1
0
0
0
0
0
0
I7
I6
I5
I4
I3
I2
I1
I0
Machine Cycle:
1
Operation:
Clear event flag
Description:
The condition corresponding to the data specified by I7 to I0 is controlled.
I0 to I8
Mode after execution of instruction
I0 = 1
EVF0 caused by overflow from Divider 0 is reset.
I1 = 1
EVF1 caused by underflow from Timer 0 is reset.
I2 = 1
EVF2 caused by signal change on port RC is reset.
I3 = 1
Reserved
I4 = 1
EVF4 caused by falling edge signal on the INT pin is reset.
I5, I6
Reserved
I7 = 1
EVF7 caused by underflow from Timer 1 is reset.
- 49 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
CLR
PMF, #I
Clear ParaMeter Flag
Machine Code:
Machine Cycle:
Operation:
Description:
0
0
0
1
0
1
1
0
1
0
0
0
I3
I2
I1
I0
1
Clear Parameter Flag
Description of each flag:
I0, I1, I2 : Reserved
I3 = 1 : The input clock of the watchdog timer is Fosc/1024.
CLR
PSR0
Clear Port Status Register 0 (RC port signal change flag)
Machine Code:
0
1
0
0
0
0
1
0
0
0
0
0
0
0
0
0
Machine Cycle:
1
Operation:
Clear Port Status Register 0 (RC port signal change flag)
Description:
When this instruction is executed, the RC port signal change flag (PSR0) is
cleared.
CLR
Reset the last 4 bits of the WatchDog Timer
WDT
Machine Code:
0
0
0
1
0
1
1
1
1
0
0
0
0
0
0
0
Machine Cycle:
1
Operation:
Reset the last 4 bits of the watchdog timer
Description:
When this instruction is executed, the last 4 bits of the watchdog timer are
reset.
- 50 -
W741C250
Instruction Set Table 2, continued
DEC
R
Decrement R content
Machine Code:
0
1
0
0
1
0
1
0
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) - 1
Description:
Decrement the data memory content and load result into the ACC and the
data memory.
Flag Affected:
CF & ZF
DIS
Disable interrupt function
INT
Machine Code:
0
1
0
1
0
0
0
0
1
0
0
0
0
0
0
Machine Cycle:
1
Operation:
Disable interrupt function
Description:
Interrupt function is inhibited by executing this instruction.
DSKNZ
Decrement R content then skip if ACC ! = 0
R
Machine Code:
0
1
0
0
1
0
0
Machine Cycle:
1
Operation:
ACC, R ← (R) - 1;
PC ← (PC) + 2 if ACC ! = 0
Description:
Flag Affected:
0
1
0
R6 R5 R4 R3 R2 R1 R0
Decrement the data memory content and load result into the ACC and the
data memory. If ACC ! = 0, the program counter is incremented by 2 and
produces a skip.
CF & ZF
- 51 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
DSKZ
R
Decrement R content then skip if ACC is zero
Machine Code:
0
1
0
0
1
0
0
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) - 1;
PC ← (PC) + 2 if ACC = 0
Description:
Decrement the data memory content and load result into the ACC and the
data memory. If ACC = 0, the program counter is incremented by 2 and
produces a skip.
Flag Affected:
CF & ZF
EN
Enable interrupt function
INT
Machine Code:
0
1
0
1
0
0
0
0
1
1
0
0
Machine Cycle:
1
Operation:
Enable interrupt function
Description:
This instruction enables the interrupt function.
HOLD
Enter the HOLD mode
Machine Code:
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
Machine Cycle:
1
Operation:
Enter the HOLD mode
Description:
The following two conditions cause the HOLD mode to be released.
(1) An interrupt is accepted.
(2) The HOLD release condition specified by the HEF is met.
In HOLD mode, when an interrupt is accepted the HOLD mode will be
released and the interrupt service routine will be executed. After
completing the interrupt service routine by executing the RTN instruction,
the µC will enter HOLD mode again.
- 52 -
W741C250
Instruction Set Table 2, continued
INC
R
Increment R content
Machine Code:
0
1
0
0
1
0
1
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) + 1
Description:
Increment the data memory content and load the result into the ACC and
the data memory.
Flag Affected:
CF & ZF
JB0
Jump when bit 0 of ACC is "1"
L
Machine Code:
1
0
0
0
0
L10
L9
L8
L7
L6
L5
L4
L3
L2
L1
L0
Machine Cycle:
1
Operation:
PC10−PC0 ← L10−L0; if ACC.0 = "1"
Description:
If bit 0 of the ACC is "1," PC10 to PC0 of the program counter are replaced
with the data specified by L10 to L0 and a jump occurs. If bit 0 of the ACC
is "0," the program counter (PC) is incremented.
JB1
Jump when bit 1 of ACC is "1"
L
Machine Code:
1
0
0
1
0
L10
L9
L8
L7
L6
L5
L4
L3
L2
L1
L0
Machine Cycle:
1
Operation:
PC10−PC0 ← L10−L0; if ACC.1 = "1"
Description:
If bit 1 of the ACC is "1," PC10 to PC0 of the program counter are replaced
with the data specified by L10 to L0 and a jump occurs. If bit 1 of the ACC
is "0," the program counter (PC) is incremented.
- 53 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
JB2
L
Jump when bit 2 of ACC is "1"
Machine Code:
1
0
1
0
0
L10
L9
L8
L7
L6
L5
L4
L3
L2
L1
L0
Machine Cycle:
1
Operation:
PC10−PC0 ← L10−L0; if ACC.2 = "1"
Description:
If bit 2 of the ACC is "1," PC10 to PC0 of the program counter are replaced
with the data specified by L10 to L0 and a jump occurs. If bit 2 of the ACC
is "0," the program counter (PC) is incremented.
JB3
Jump when bit 3 of ACC is "1"
L
Machine Code:
1
0
1
1
0
L10 L9
L8
L7
L6
L5
L4
L3
L2
L1
L0
Machine Cycle:
1
Operation:
PC10−PC0 ← L10−L0; if ACC.3 = "1"
Description:
If bit 3 of the ACC is "1," PC10 to PC0 of the program counter are replaced
with the data specified by L10 to L0 and a jump occurs. If bit 3 of the ACC
is "0," the program counter (PC) is incremented.
JC
Jump when CF is "1"
L
Machine Code:
1
1
1
1
0
L10
L9
L8
L7
L6
L5
L4
L3
L2
L1
L0
Machine Cycle:
1
Operation:
PC10−PC0 ← L10−L0; if CF = "1"
Description:
If CF is "1," PC10 to PC0 of the program counter are replaced with the data
specified by L10 to L0 and a jump occurs. If the CF is "0," the program
counter (PC) is incremented.
- 54 -
W741C250
Instruction Set Table 2, continued
JMP
L
Jump absolutely
Machine Code:
0
1
1
1
0
L10
L9
L8
L7
L6
L5
L4
L3
L2
L1
L0
Machine Cycle:
1
Operation:
PC10−PC0 ← L10−L0
Description:
PC10 to PC0 of the program counter are replaced with the data specified
by L10 to L0 and an unconditional jump occurs.
JNC
Jump when CF is not "1"
L
Machine Code:
1
1
0
1
0
L10
L9
L8
L7
L6
L5
L4
L3
L2
L1
L0
Machine Cycle:
1
Operation:
PC10−PC0 ← L10−L0; if CF = "0"
Description:
If CF is "0," PC10 to PC0 of the program counter are replaced with the data
specified by L10 to L0 and a jump occurs. If CF is "1," the program counter
(PC) is incremented.
JNZ
Jump when ACC is not zero
L
Machine Code:
1
1
0
0
0
L10
L9
L8
L7
L6
L5
L4
L3
L2
L1
L0
Machine Cycle:
1
Operation:
PC10−PC0 ← L10−L0; if ACC ! = 0
Description:
If the ACC is not zero, PC10 to PC0 of the program counter are replaced
with the data specified by L10 to L0 and a jump occurs. If the ACC is zero,
the program counter (PC) is incremented.
- 55 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
JZ
L
Jump when ACC is zero
Machine Code:
1
1
1
0
0
L10
L9
L8
L7
L6
L5
L4
L3
L2
L1
L0
Machine Cycle:
1
Operation:
PC10−PC0 ← L10−L0; if ACC = 0
Description:
If the ACC is zero, PC10 to PC0 of the program counter are replaced with
the data specified by L10 to L0 and a jump occurs. If the ACC is not zero,
the program counter (PC) is incremented.
LCDON
LCD ON
Machine Code:
0
0
0
0
0
0
Machine Cycle:
1
Operation:
LCD ON
Description:
Turn on LCD display.
LCDOFF
LCD OFF
Machine Code:
0
0
0
0
0
0
Machine Cycle:
1
Operation:
LCD OFF
Description:
Turn off LCD display.
1
0
0
0
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
0
- 56 -
W741C250
Instruction Set Table 2, continued
MOV ACC, R
Move R content to ACC
Machine Code:
0
1
0
0
1
1
1
0
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC ← (R)
Description:
The contents of the data memory location addressed by R6 to R0 are
loaded into the ACC.
Flag Affected:
ZF
MOV
Move R.0 content to CF
CF, R
Machine Code:
0
1
0
1
1
0
0
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
CF ← (R.0)
Description:
The bit 0 content of the data memory location addressed by R6 to R0 is
loaded into CF.
Flag Affected:
CF
- 57 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
MOV HEF, #I
Set/Reset Hold mode release Enable Flag
Machine Code:
0
1
0
0
0
0
0
1
I7
I6
Machine Cycle:
1
Operation:
Hold mode release enable flag control
Description:
I0 to I7
I5
I4
I3
I2
I1
I0
Operation
I0 = 1
HEF0 is set so that overflow from Divider 0 will cause the
HOLD mode to be released.
I1 = 1
HEF1 is set so that underflow from Timer 0 will cause the
HOLD mode to be released.
I2 = 1
HEF2 is set so that signal change on port RC will cause the
HOLD mode to be released.
I3 = 1
Reserved
I4 = 1
HEF4 is set so that the falling edge signal on the INT pin
will cause the HOLD mode to be released.
I5 & I6
I7 = 1
Reserved
HEF7 is set so that underflow from Timer 1 will cause the
HOLD mode to be released.
- 58 -
W741C250
Instruction Set Table 2, continued
MOV
IEF, #I
Set/Reset Interrupt Enable Flag
Machine Code:
0
1
0
1
0
0
0
1
I7
I6
I5
I4
I3
I2
I1
I0
Machine Cycle:
1
Operation:
Interrupt Enable flag Control
Description:
The interrupt enable flag corresponding to the data specified by I7−I0 is
controlled:
I0 to I5
Operation
I0 = 1
The IEF0 is set so that interrupt 0 (overflow from Divider 0)
is accepted.
I1 = 1
The IEF1 is set so that interrupt 1 (underflow from Timer 0)
is accepted.
I2 = 1
The IEF2 is set so that interrupt 2 (signal change on port
RC) is accepted.
I3 = 1
Reserved
The IEF4 is set so that interrupt 4 (falling edge signal on
I4 = 1
MOV
LCDM, #I
the INT pin) is accepted.
I5 & I6
Reserved
I7 = 1
The IEF7 is set so that interrupt 7 (underflow from Timer 1)
is accepted.
Select LCD output Mode type
Machine Code:
0
0
0
0
0
0
1
1
0
0
I5
I4
I3
I2
I1
I0
Machine Cycle:
1
Operation:
Select LCD output mode type
Description:
When LCD output pins are set to DC output mode, user can select CMOS
or NMOS as output type.
I0−I5 = 0 => CMOS type; I0−I5 = 1 => NMOS type
- 59 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
MOV LCDR, ACC
Move ACC content to LCDR
Machine Code:
0
0
0
0
0
1
1
D4
D3 D2 D1 D0
0
0
0
0
Machine Cycle:
1
Operation:
LCDR ← (ACC)
Description:
The contents of the ACC are loaded to the LCD data RAM (LCDR) location
addressed by D4 to D0.
MOV LCDR, WR
Load WR content to LCDR
Machine Code:
0
1
0
0
0
1
0
D4
D3 D2 D1 D0 W3 W2 W1 W0
Machine Cycle:
1
Operation:
LCDR ← (WR)
Description:
The contents of the WR are loaded to the LCD data RAM (LCDR) location
addressed by D4 to D0.
MOV
Load immediate data to LCDR
LCDR, #I
Machine Code:
0
0
0
0
0
1
0
D4
D3 D2 D1 D0 I3
I2
I1
I0
Machine Cycle:
1
Operation:
LCDR ← I
Description:
The immediate data I are loaded to the LCD data RAM (LCDR) location
addressed by D4 to D0.
- 60 -
W741C250
Instruction Set Table 2, continued
MOV
MFP, #I
Modulation Frequency Pulse generator
Machine Code:
0
0
0
1
0
0
1
0
I7
I6
I5
I4
I3
I2
I1
I0
Machine Cycle:
1
Operation:
[MFP] ← I
Description:
If the bit 2 of MR1 is "0," the waveform specified by I7 to I0 is delivered at
the MFP output pin (MFP). The relationship between the waveform and
immediate data I is as follows:
MOV
MR0, #I
I5~I0
I0 = 1
I1 = 1
I2 = 1
I3 = 1
Signal
Fosc
256
Fosc
512
Fosc
4096
Fosc
8192
I7
I6
Signal
0
0
Low
0
1
High
1
0
Fosc/16
1
1
Fosc/8
I4 = 1
Fosc
16384
I5 = 1
Fosc
32768
Load immediate data to Mode Register 0 (MR0)
Machine Code:
0
0
0
1
0
0
1
1
1
0
0
Machine Cycle:
1
Operation:
MR0 ← I
Description:
The immediate data I are loaded to the MR0.
0
I3
I2
I1
I0
MR0 bits description:
bit 0
= 0 The fundamental frequency of Timer 0 is Fosc/4
= 1 The fundamental frequency of Timer 0 is Fosc/1024
bit 1
Reserved
bit 2
Reserved
bit 3
= 0 Timer 0 stop down-counting
= 1 Timer 0 start down-counting
- 61 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
MOV
MR1, #I
Load immediate data to Mode Register 1 (MR1)
Machine Code:
0
0
0
1
0
0
1
1
0
0
0
Machine Cycle:
1
Operation:
MR1 ← I
Description:
The immediate data I are loaded to the MR1.
0
I3
I2
I1
I0
MR1 bit description:
MOV PAGE, #I
bit0
= 0 The internal fundamental frequency of Timer 1 is Fosc
= 1 The internal fundamental frequency of Timer 1 is Fosc/64
bit1
= 0 The fundamental frequency source of Timer 1 is
internal clock
= 1 The fundamental frequency source of Timer 1 is
external clock via RC.0 input pin
bit2
= 0 The specified waveform of the MFP generator is
delivered at the MFP output pin
= 1 The specified frequency of the Timer 1 is delivered at
the MFP output pin
bit3
= 0 Timer 1 stop down-counting
= 1 Timer 1 start down-counting
Load immediate data to Page Register
Machine Code:
0
1
0
1
0
1
1
0
1
0
0
Machine Cycle:
1
Operation:
Page Register ← I
Description:
The immediate data I are loaded to the PR.
0
I3
I2
I1
I0
Bit 3 is reserved.
Bit 0, bit 1, and bit 2 indirect addressing mode preselect bits:
- 62 -
W741C250
Instruction Set Table 2, continued
MOV
PEF, #I
bit2
bit1
bit0
0
0
0
= Page 0 (00H to 0FH)
0
0
1
= Page 1 (10H to 1FH)
0
1
0
= Page 2 (20H to 2FH)
0
1
1
= Page 3 (30H to 3FH)
1
0
0
= Page 4 (40H to 4FH)
1
0
1
= Page 5 (50H to 5FH)
1
1
0
= Page 6 (60H to 6FH)
1
1
1
= Page 7 (70H to 7FH)
Set/Reset Port Enable Flag
Machine Code:
0
1
0
0
0
0
1
1
0
0
0
0
I3
I2
I1
I0
Machine Cycle:
1
Operation:
Port enable flag control
Description:
The data specified by I can cause HOLD mode to be released or an
interrupt to occur. The signal change on port RC is specified.
I0 to I3 Signal change at port RC
I0 = 1
RC0
I1 = 1
RC1
I2 = 1
RC2
I3 = 1
RC3
- 63 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
MOV PM0, #I
Set/Reset Port Mode 0 register
Machine Code:
Machine Cycle:
Operation:
Description:
0
1
0
1
0
0
1
1
0
0
0
0
I3
I2
I1
I0
1
Set/Reset Port mode 0 register
I0 = 0: RA port is CMOS type; I0 = 1: RA port is NMOS type.
I1 = 0: RB port is CMOS type; I1 = 1: RB port is NMOS type.
I2 = 0: RC port pull-high resistor is disabled;
I2 = 1: RC port pull-high resistor is enabled.
I3 = 0: RD port pull-high resistor is disabled;
I3 = 1: RD port pull-high resistor is enabled.
MOV PM1, #I
RA port independent Input/Output control
Machine Code:
0
1
0
1
0
1
1
1
0
0
0
0
I3
I2
Machine Cycle:
1
Operation:
Input/output control of 4 RA port pins is independent.
Description:
I0 = 0: RA.0 is output pin; I0 = 1: RA.0 is input pin.
I1 = 0: RA.1 is output pin; I1 = 1: RA.1 is input pin.
I2 = 0: RA.2 is output pin; I2 = 1: RA.2 is input pin.
I3 = 0: RA.3 is output pin; I3 = 1: RA.3 is input pin.
Default condition RA port is input mode (PM1 = 1111B).
- 64 -
I1
I0
W741C250
Instruction Set Table 2, continued
MOV PM2, #I
RB port independent Input/Output control
Machine Code:
0
1
0
1
0
1
1
1
1
0
0
0
I3
I2
Machine Cycle:
1
Operation:
Input/output control of 4 RB port pins is independent.
Description:
I0 = 0: RB.0 is output pin; I0 = 1: RB.0 is input pin.
I1 = 0: RB.1 is output pin; I1 = 1: RB.1 is input pin.
I2 = 0: RB.2 is output pin; I2 = 1: RB.2 is input pin.
I3 = 0: RB.3 is output pin; I3 = 1: RB.3 is input pin.
I1
I0
Default condition RB port is input mode (PM2 = 1111B).
MOV
R, ACC
Move ACC content to R
Machine Code:
0
1
0
1
1
0
0
1
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
R ← (ACC)
Description:
The contents of the ACC are loaded to the data memory location
addressed by R6 to R0.
MOVA R, RA
Input RA port data to ACC & R
Machine Code:
0
1
0
1
1
0
1
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC , R ← [RA]
Description:
The data on port RA are loaded into the data memory location addressed
by R6 to R0 and the ACC.
Flag Affected:
ZF
- 65 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
MOVA
R, RB
Input RB port data to ACC & R
Machine Code:
0
1
0
1
1
0
1
1
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC , R ← [RB]
Description:
The data on port RB are loaded into the data memory location addressed
by R6 to R0 and the ACC.
Flag Affected:
ZF
MOVA R, RC
Input RC port data to ACC & R
Machine Code:
0
1
0
0
1
0
1
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC , R ← [RC]
Description:
The input data on input port RC are loaded into the data memory location
addressed by R6 to R0 and the ACC.
Flag Affected:
ZF
MOVA R, RD
Input RD port data to ACC & R
Machine Code:
Machine Cycle:
Operation:
0
1
0
0
1
0
1
1
1
R6 R5 R4 R3 R2 R1 R0
1
ACC , R ← [RD]
Description:
The input data on input port RD are loaded into the data memory location
addressed by R6 to R0 and the ACC.
Flag Affected:
ZF
- 66 -
W741C250
Instruction Set Table 2, continued
MOV
R, WR
Move WR content to R
Machine Code:
Machine Cycle:
Operation:
1
1
1
1
1
W3 W2 W1
W0 R6 R5 R4 R3 R2 R1 R0
1
R ← (WR)
Description:
The contents of the WR are loaded to the data memory location addressed
by R6 to R0.
MOV
R, #I
Load immediate data to R
Machine Code:
Machine Cycle:
Operation:
Description:
MOV
RA, R
1
0
1
1
1
I3
I2
I1
I0
R6 R5 R4 R3 R2 R1 R0
1
R←I
The immediate data I are loaded to the data memory location addressed by
R6 to R0.
Output R content to RA port
Machine Code:
0
1
0
1
1
0
1
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
[RA] ← (R)
Description:
The data in the data memory location addressed by R6 to R0 are output to
port RA.
- 67 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
MOV
RB, R
Output R content to RB port
Machine Code:
0
1
0
1
1
0
1
0
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
[RB] ← (R)
Description:
The contents of the data memory location addressed by R6 to R0 are
output to port RB.
MOV
Output R content to port RE
RE, R
Machine Code:
0
1
0
1
1
1
1
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
[RE] ← (R)
Description:
The contents of the data memory location addressed by R6 to R0 are
output to port RE.
MOV SEF, #I
Set/Reset STOP mode wake-up Enable Flag for port RC
Machine Code:
0
1
0
1
0
0
1
0
0
0
0
0
I3
I2
I1
I0
Machine Cycle:
1
Operation:
Set/reset STOP mode wake-up enable flag for port RC
Description:
The data specified by I cause a wake-up from the STOP mode. The fallingedge signal on port RC can be specified independently.
I0 to I3
Falling edge signal on port RC
I0 = 1
RC0
I1 = 1
RC1
I2 = 1
RC2
I3 = 1
RC3
- 68 -
W741C250
Instruction Set Table 2, continued
MOV TM0, #I
Timer 0 set
0
Machine Code:
0
0
1
0
0
0
0
I7
I6
I5
I4
I3
I2
I1
I0
Machine Cycle:
1
Operation:
Timer 0 set
Description:
The data specified by I7 to I0 is loaded to the Timer 0 to start the timer.
MOV TM0L, R
Move R contents to TM0L
0
Machine Code:
0
0
1
0
1
0
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
TM0L ← (R)
Description:
The contents of the data memory location addressed by R6 to R0 are
loaded into the TM0L.
MOV TM0H, R
Move R contents to TM0H
0
Machine code:
0
0
1
0
1
0
0
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
TM0H ← (R)
Description:
The contents of the data memory location addressed by R6 to R0 are
loaded into the TM0H.
MOV TM1, #I
Timer 1 set
0
Machine Code:
0
0
1
0
0
0
1
I7
I6
I5
I4
I3
I2
I1
I0
Machine Cycle:
1
Operation:
Timer 1 set
Description:
The data specified by I7 to I0 is loaded to the Timer 1 to start the timer.
- 69 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
MOV TM1L, R
Move R contents to TM1L
Machine Code:
Machine Cycle:
Operation:
Description:
MOV TM1H, R
0
Operation:
Description:
MOV WR, LCDR
0
1
0
1
0
1
0
R6 R5 R4 R3 R2 R1 R0
1
TM1L ← (R)
The contents of the data memory location addressed by R6 to R0 are
loaded into the TM1L.
Move R contents to TM1H
Machine code:
Machine Cycle:
0
0
0
0
1
0
1
0
1
1
R6 R5 R4 R3 R2 R1 R0
1
TM1H ← (R)
The contents of the data memory location addressed by R6 to R0 are
loaded into the TM1H.
Load LCDR content to WR
Machine Code:
0
1
0
0
0
1
1
D4
D3 D2 D1 D0 W3 W2 W1 W0
Machine Cycle:
1
Operation:
WR ← (LCDR)
Description:
The contents of the LCD data RAM location addressed by D4 to D0 are
loaded to the WR.
MOV
Move R content to WR
WR, R
Machine Code:
1
1
1
0
1
W3 W2 W1
W0 R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
WR ← (R)
Description:
The contents of the data memory location addressed by R6 to R0 are
loaded to the WR.
- 70 -
W741C250
Instruction Set Table 2, continued
MOV
WR, @R
Indirect load from R to WR
Machine Code:
1
1
0
0
1
W3 W2 W1
W0 R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
2
Operation:
WR ← [PR (bit2, bit1, bit0) × 10H + (R)]
Description:
The data memory contents of address [PR (bit2, bit1, bit0) × 10H + (R)] are
loaded to the WR.
MOV
Indirect load from WR to R
@R, WR
Machine Code:
1
1
0
1
1
W3 W2 W1
W0 R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
2
Operation:
[PR (bit2, bit1, bit0) × 10H + (R)] ← WR
Description:
The contents of the WR are loaded to the data memory location addressed
by [PR (bit2, bit1, bit0) × 10H + (R)].
MOV PAGE, R
Move R content to Page Register
Machine Code:
0
1
0
1
1
1
1
0
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
PR ← (R)
Description:
The contents of the data memory location addressed by R6 to R0 are
loaded to the PR.
- 71 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
MOVA
R, CF
Move CF content to ACC.0 & R.0
Machine Code:
0
1
0
1
1
0
0
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC.0, R.0 ← (CF)
Description:
The content of CF is loaded to bit 0 of the data memory location addressed
by R6 to R0 and the ACC. The other bits of the data memory and ACC are
reset to "0."
Flag Affected:
ZF
MOVA R, HCFH
Move HCF4−7 to ACC & R
Machine Code:
0
1
0
0
1
0
0
1
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← HCF4−7
Description:
The contents of HCF bit 4 to bit 7 (HCF4 to HCF7) are loaded to the data
memory location addressed by R6 to R0 and the ACC. The ACC contents
and the meaning of the bits after execution of this instruction are as
follows:
Flag Affected:
Bit 0
HCF4: "1" when the HOLD mode is released by a falling signal on the INT pin.
Bit 1
HCF5: "1" when the HOLD mode is released by underflow from Timer 1.
Bit 2
Reserved.
Bit 3
Reserved.
ZF
- 72 -
W741C250
Instruction Set Table 2, continued
MOVA R, HCFL
Move HCF0−3 to ACC & R
Machine Code:
0
1
0
0
1
0
0
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← HCF0−3
Description:
The contents of HCF bit 0 to bit 3 (HCF0 to HCF3) are loaded to the data
memory location addressed by R6 to R0 and the ACC. The ACC contents
and the meaning of the bits after execution of this instruction are as
follows:
Bit 0
HCF0: "1" when the HOLD mode is released by
overflow from Divider 0.
Bit 1
HCF1: "1" when the HOLD mode is released by
underflow from Timer 0.
Bit 2
HCF2: "1" when the HOLD mode is released by
a signal change on port RC.
Bit 3
Reserved
Flag Affected:
ZF
MOVA R, PAGE
Move Page Register content to ACC & R
Machine Code:
0
1
0
1
1
1
1
1
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC , R ← (Page Register)
Description:
The contents of the Page Register (PR) are loaded to the data memory
location addressed by R6 to R0 and the ACC.
Flag Affected:
ZF
- 73 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
MOVA R, PSR0
Move Port Status Register 0 content to ACC & R
Machine Code:
0
1
0
0
1
1
1
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← RC port signal change flag (PSR0)
Description:
The contents of the RC port signal change flag (PSR0) are loaded to the
data memory location addressed by R6 to R0 and the ACC. When the
signal changes on any pin of the RC port, the corresponding signal change
flag should be set to 1. Otherwise, it should be 0.
Flag Affected:
ZF
MOVA
Move WR content to ACC & R
R, WR
Machine Code:
0
1
1
1
1
W3 W2 W1
W0 R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (WR)
Description:
The contents of the WR are loaded to the ACC and the data memory
location addressed by R6 to R0.
Flag Affected:
ZF
MOVA
Move R content to ACC & WR
WR, R
Machine Code:
0
1
1
0
1
W3 W2 W1
W0 R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, WR ← (R)
Description:
The contents of the data memory location addressed by R6 to R0 are
loaded to the WR and the ACC.
Flag Affected:
ZF
- 74 -
W741C250
Instruction Set Table 2, continued
MOVC R
Move look-up table ROM addressed by TABL and TABH to R
Machine code:
Machine Cycle:
Operation:
Description:
MOVC WR, #I
1
0
0
1
1
0
0
1
0
R6 R5 R4 R3 R2 R1 R0
2
WR ← [((TABH) × 100H + (TABL)) × 10H + ACC ]
The contents of the look-up table ROM location addressed by TABH, TABL
and ACC are loaded to R.
Move look-up table ROM addressed by #I and ACC to WR
Machine code:
1
0
1
0
1
W3 W2 W1
W0 I6
I5
I4
I3
I2
I1
I0
Machine Cycle:
2
Operation:
WR ← [(I6 ~ I0) × 10H + (ACC)]
Description:
The contents of the look-up table ROM location addressed by I6 to I0 and
the ACC are loaded to R.
NOP
No Operation
Machine Code:
0
0
0
Machine Cycle:
1
Operation:
No Operation
0
0
0
0
0
- 75 -
0
0
0
0
0
0
0
0
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
ORL
R, ACC
OR R to ACC
Machine Code:
0
0
1
1
1
0
1
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC ← (R) ∧ (ACC)
Description:
The contents of the data memory location addressed by R6 to R0 and the
ACC are ORed and the result is loaded into the ACC.
Flag Affected:
ZF
ORL
OR immediate data to WR
WR , #I
Machine Code:
0
0
1
1
1
1
1
0
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC ← (WR) ∧ I
Description:
The contents of the Working Register (WR) and the immediate data I are
ORed and the result is loaded into the ACC.
Flag Affected:
ZF
ORLR R, ACC
OR R to ACC
Machine Code:
0
0
1
1
1
0
1
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) ∧ (ACC)
Description:
The contents of the data memory location addressed by R6 to R0 and the
ACC are ORed and the result is placed in the data memory and the ACC.
Flag Affected:
ZF
- 76 -
W741C250
Instruction Set Table 2, continued
ORLR WR , #I
OR immediate data to WR
Machine Code:
0
0
1
1
1
1
1
1
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC, WR ← (WR) ∧ I
Description:
The contents of the Working Register (WR) and the immediate data I are
ORed and the result is placed in the WR and the ACC.
Flag Affected:
ZF
RLC
Rotate Left R with CF
R
Machine Code:
0
1
0
0
1
1
0
0
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC.n, R.n ← R.n-1; ACC.0, R.0 ← CF; CF ← R.3
Description:
The contents of the ACC and the data memory location addressed by R6 to
R0 are rotated left one bit, bit 3 is rotated into CF, and CF rotated into bit 0
(LSB). The same contents are loaded into the ACC.
Flag Affected:
CF & ZF
RRC
Rotate Right R with CF
R
Machine Code:
0
1
0
0
1
1
0
1
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC.n, R.n ← R.n+1; ACC.3, R.3 ← CF; CF ← R.0
Description:
The contents of the ACC and the data memory location addressed by R6 to
R0 are rotated right one bit, bit 0 is rotated into CF, and CF is rotated into
bit 3 (MSB). The same contents are loaded into the ACC.
Flag Affected:
CF & ZF
- 77 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
RTN
Return from subroutine
Machine Code:
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
Machine Cycle:
1
Operation:
(PC) ← STACK
Description:
The program counter (PC10 to PC0) is restored from the stack. A return
from a subroutine occurs.
SBC
Subtract ACC from R with Borrow
R, ACC
Machine Code:
0
0
0
0
1
0
1
0
0
R6
R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC ← (R) - (ACC) - (CF)
Description:
The contents of the ACC and CF are binary subtracted from the contents of
the data memory location addressed by R6 to R0 and the result is loaded
into the ACC.
Flag Affected:
SBC
WR, #I
CF & ZF
Subtract immediate data from WR with Borrow
Machine Code:
0
0
0
0
1
1
1
0
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC ← (WR) - I - (CF)
Description:
The immediate data I and CF are binary subtracted from the contents of
the WR and the result is loaded into the ACC.
Flag Affected:
CF & ZF
- 78 -
W741C250
Instruction Set Table 2, continued
SBCR R, ACC
Subtract ACC from R with Borrow
Machine Code:
0
0
0
0
1
0
1
1
0
R6
R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) - (ACC) - (CF)
Description:
The contents of the ACC and CF are binary subtracted from the contents of
the data memory location addressed by R6 to R0 and the result is placed in
the ACC and the data memory.
Flag Affected:
CF & ZF
SBCR
Subtract immediate data from WR with Borrow
WR, #I
Machine Code:
0
0
0
0
1
1
1
1
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC, R ← (WR) - I - (CF)
Description:
The immediate data I and CF are binary subtracted from the contents of
the WR and the result is placed in the ACC and the WR.
Flag Affected:
SET
CF
CF & ZF
Set CF
Machine Code:
0
1
0
1
0
Machine Cycle:
1
Operation:
Set CF
Description:
Set Carry Flag to 1.
Flag Affected:
CF
0
0
0
- 79 -
0
1
0
0
0
0
0
0
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
SET
PMF, #I
Set ParaMeter Flag
Machine Code:
Machine Cycle:
Operation:
Description:
0
0
0
1
0
1
1
0
0
0
0
0
I3
I2
I1
I0
1
Set Parameter Flag
Description of each flag:
I0, I1, I2 : Reserved
I3 = 1 : The input clock of the watchdog timer is Fosc/16384.
SHLC
R
SHift Left R with CF and LSB = 0
Machine Code:
0
1
0
0
1
1
0
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC.n, R.n ← R.n-1; ACC.0, R.0 ← 0; CF ← R.3
Description:
The contents of the ACC and the data memory location addressed by R6 to
R0 are shifted left one bit, but bit 3 is shifted into CF, and bit 0 (LSB) is
replaced with "0." The same contents are loaded into the ACC.
Flag Affected:
CF & ZF
SHRC
SHift Right R with CF and MSB = 0
R
Machine Code:
0
1
0
0
1
1
0
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC.n, R.n ← R.n+1; ACC.3, R.3 ← 0; CF ← R.0
Description:
The contents of the ACC and the data memory location addressed by R6 to
R0 are shifted right one bit, but bit 0 is shifted into CF, and bit 3 (MSB) is
replaced with "0." The same contents are loaded into the ACC.
Flag Affected:
CF & ZF
- 80 -
W741C250
Instruction Set Table 2, continued
SKB0
R
If bit 0 of R is equal to 1 then skip
Machine Code:
1
0
0
0
1
0
0
Machine Cycle:
1
Operation:
PC ← (PC) + 2; if R.0 = "1"
Description:
SKB1
R
0
0
R6 R5 R4 R3 R2 R1 R0
If bit 0 of R is equal to 1, the program counter is incremented by 2 and a
skip is produced. If bit 0 of R is not equal to 1, the program counter (PC) is
incremented.
If bit 1 of R is equal to 1 then skip
Machine Code:
1
0
0
0
1
0
0
0
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
PC ← (PC) + 2; if R.1 = "1"
Description:
If bit 1 of R is equal to 1, the program counter is incremented by 2 and a
skip is produced. If bit 1 of R is not equal to 1, the program counter (PC) is
incremented.
SKB2
If bit 2 of R is equal to 1 then skip
R
Machine Code:
1
0
0
0
1
0
1
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
PC ← (PC) + 2; if R.2 = "1"
Description:
If bit 2 of R is equal to 1, the program counter is incremented by 2 and a
skip is produced. If bit 2 of R is not equal to 1. The program counter (PC) is
incremented.
- 81 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
SKB3
R
If bit 3 of R is equal to 1 then skip
Machine Code:
1
0
0
0
1
0
1
0
1
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
PC ← (PC) + 2; if R.3 = "1"
Description:
If bit 3 of R is equal to 1, the program counter is incremented by 2 and a
skip is produced. If bit 3 of R is not equal to 1, the program counter (PC) is
incremented.
STOP
Enter the STOP mode
Machine Code:
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
Machine Cycle:
1
Operation:
STOP oscillator
Description:
Device enters STOP mode. When signal on the INT pin goes low or the
falling edge signal of RC port is accepted, the µC will wake up and execute
the next instruction.
SUB
Subtract ACC from R
R, ACC
Machine Code:
0
0
0
1
1
0
1
0
0
R6
R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC ← (R) - (ACC)
Description:
The contents of the ACC are binary subtracted from the contents of the
data memory location addressed by R6 to R0 and the result is loaded into
the ACC.
Flag Affected:
CF & ZF
- 82 -
W741C250
Instruction Set Table 2, continued
SUB
WR , #I
Subtract immediate data from WR
Machine Code:
0
0
0
1
1
1
1
0
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC ← (WR) - I
Description:
The immediate data I are binary subtracted from the contents of the WR
and the result is loaded into the ACC.
Flag Affected:
CF & ZF
SUBR R, ACC
Subtract ACC from R
Machine Code:
0
0
0
1
1
0
1
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) - (ACC)
Description:
The contents of the ACC are binary subtracted from the contents of the
data memory location addressed by R6 to R0 and the result is placed in the
ACC and the data memory.
Flag Affected:
CF & ZF
SUBR
Subtract immediate data from WR
WR , #I
Machine Code:
0
0
0
1
1
1
1
1
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC, WR ← (WR) - I
Description:
The immediate data I are binary subtracted from the contents of the WR
and the result is placed in the ACC and the WR.
Flag Affected:
CF & ZF
- 83 -
Publication Release Date: March 1998
Revision A4
W741C250
Instruction Set Table 2, continued
XRL
R, ACC
Exclusive OR R to ACC
Machine Code:
0
0
1
1
1
0
0
0
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC ← (R) EX (ACC)
Description:
The contents of the data memory location addressed by R6 to R0 and the
ACC are exclusive-ORed and the result is loaded into the ACC.
Flag Affected:
ZF
XRL
Exclusive OR immediate data to WR
WR, #I
Machine Code:
0
0
1
1
1
1
0
0
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC ← (WR) EX I
Description:
The contents of the Working Register (WR) and the immediate data I are
exclusive-ORed and the result is loaded into the ACC.
Flag Affected:
ZF
XRLR R, ACC
Exclusive OR R to ACC
Machine Code:
0
0
1
1
1
0
0
1
0
R6 R5 R4 R3 R2 R1 R0
Machine Cycle:
1
Operation:
ACC, R ← (R) EX (ACC)
Description:
The contents of the data memory location addressed by R6 to R0 and the
ACC are exclusive-ORed and the result is placed in the data memory and
the ACC.
Flag Affected:
ZF
- 84 -
W741C250
Instruction Set Table 2, continued
XRLR
WR, #I
Exclusive OR immediate data to WR
Machine Code:
0
0
1
1
1
1
0
1
I3
I2
I1
I0
W3 W2 W1 W0
Machine Cycle:
1
Operation:
ACC, WR ← (WR) EX I
Description:
The contents of the Working Register (WR) and the immediate data I are
exclusive-ORed and the result is placed in the WR and the ACC.
Flag Affected:
ZF
- 85 -
Publication Release Date: March 1998
Revision A4
W741C250
PACKAGE DIMENSIONS
64-Lead QFP (14 × 20 × 2.75mm footprint 4.8mm)
HD
D
64
52
51
1
E
E H
33
19
20
e
b
32
c
2
A A
1
See Detail F
y
Seating Plane
L
A
L1
Symbol
A
A1
A2
b
c
D
E
e
HD
HE
L
L1
y
0
Dimension in inches
Dimension in mm
Min Nom Max
Min.
Max. Min.
Min Nom Max
Max.
0.130
0.004
3.30
0.10
0.107 0.112
0.117
2.73
2.85
2.97
0.014 0.016
0.020
0.35
0.40
0.50
0.004 0.006
0.010
0.10
0.15
0.25
0.546 0.551
0.556
13.87
14.00 14.13
0.782 0.787
0.792
19.87
20.00 20.13
0.033 0.039
0.045
0.85
1.00
1.15
0.728
0.740
0.752
18.49
18.80
19.10
0.964
0.976
0.988
24.49
24.80
25.10
0.039
0.047
0.055
1.00
1.20
1.40
0.087
0.094 0.103
2.21
2.40
2.62
0.004
0
12
- 86 -
0.10
0
12
Detail F
W741C250
NOTES:
- 87 -
Publication Release Date: March 1998
Revision A4
W741C250
Headquarters
Winbond Electronics (H.K.) Ltd.
Rm. 803, World Trade Square, Tower II,
No. 4, Creation Rd. III,
123 Hoi Bun Rd., Kwun Tong,
Science-Based Industrial Park,
Kowloon, Hong Kong
Hsinchu, Taiwan
TEL: 852-27513100
TEL: 886-3-5770066
FAX: 852-27552064
FAX: 886-3-5792766
http://www.winbond.com.tw/
Voice & Fax-on-demand: 886-2-27197006
Taipei Office
11F, No. 115, Sec. 3, Min-Sheng East Rd.,
Taipei, Taiwan
TEL: 886-2-27190505
FAX: 886-2-27197502
Note: All data and specifications are subject to change without notice.
- 88 -
Winbond Electronics North America Corp.
Winbond Memory Lab.
Winbond Microelectronics Corp.
Winbond Systems Lab.
2727 N. First Street, San Jose,
CA 95134, U.S.A.
TEL: 408-9436666
FAX: 408-5441798