參數(shù)資料
型號(hào)： M34282M1-XXXGP
元件分類： 微控制器/微處理器
英文描述： 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20
封裝： 0.225 INCH, 0.65 MM PITCH, PLASTIC, SSOP-20
文件頁(yè)數(shù)： 16/70頁(yè)
文件大小： 625K
代理商： M34282M1-XXXGP
MITSUBISHI
ELECTRIC
23
MITSUBISHI MICROCOMPUTERS
4282 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
INSTRUCTIONS
The 4282 Group has the 68 instructions. Each instruction is
described as follows;
(1) List of instruction function
(2) Machine instructions (index by alphabet)
(3) Machine instructions (index by function)
(4) Instruction code table
SYMBOL
The symbols shown below are used in the following list of
instruction function and the machine instructions.
Symbol
A
B
DR
ER
V1
V2
PU0
PU1
LO
X
Y
DP
PC
PCH
PCL
SK
SP
CY
R1
T1
T1F
R2H
R2L
T2
T2F
WDT
WDF1
WDF2
URS
P
STCK
INSTCK
Contents
Register A (4 bits)
Register B (4 bits)
Register D (3 bits)
Register E (8 bits)
Timer control register V1 (3 bits)
Timer control register V2 (4 bits)
Pull-down control register PU0 (4 bits)
Pull-down control register PU1 (4 bits)
Logic operation selection register LO (2 bits)
Register X (2 bits)
Register Y (4 bits)
Data pointer (6 bits)
(It consists of registers X and Y)
Program counter (11 bits)
High-order 4 bits of program counter
Low-order 7 bits of program counter
Stack register (11 bits 4)
Stack pointer (2 bits)
Carry flag
Timer 1 reload register
Timer 1
Timer 1 underflow flag
Timer 2 reload register
Timer 2
Timer 2 underflow flag
Watchdog timer
Watchdog timer flag 1
Watchdog timer flag 2
Most significant ROM code reference enable flag
Power down flag
System clock
Instruction clock
Contents
Port D (8 bits)
Port E (3 bits)
Port G (4 bits)
Port CARR (1 bit)
CAR flag (1 bit)
Hexadecimal variable
Hexadecimal constant which represents the
immediate value
Hexadecimal constant which represents the
immediate value
Binary notation of hexadecimal variable A
(same for others)
Direction of data movement
Data exchange between a register and memory
Decision of state shown before “?”
Contents of registers and memories
Negate, Flag unchanged after executing
instruction
RAM address pointed by the data pointer
Label indicating address a6 a5 a4 a3 a2 a1 a0
in page p3 p2 p1 p0
Hex. number C + Hex. number x (also same for
others)
Symbol
D
E
G
CARR
CAR
x
y
p
n
j
A3A2A1A0
←
?
( )
—
M(DP)
a
p, a
C
+
x
Note : The 4282 Group just invalidates the next instruction when a skip is performed. The contents of program counter is not
increased by 2. Accordingly, the number of cycles does not change even if skip is not performed. However, the cycle count
becomes “1” if the TABP p, RT, or RTS instruction is skipped.
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