ST7232A Datasheet, PDF (110/154 Pages) STMicroelectronics – 8-BIT MCU WITH 8K FLASH/ROM, ADC, 4 TIMERS, SPI, SCI INTERFACE

ST7232A
INSTRUCTION SET OVERVIEW (Cont’d)
Mnemo
JRULE
LD
MUL
NEG
NOP
OR
Description
Jump if (C + Z = 1)
Load
Multiply
Negate (2's compl)
No Operation
OR operation
POP
Pop from the Stack
PUSH
RCF
RET
RIM
RLC
RRC
RSP
SBC
SCF
SIM
SLA
SLL
SRL
SRA
SUB
SWAP
TNZ
TRAP
WFI
XOR
Push onto the Stack
Reset carry flag
Subroutine Return
Enable Interrupts
Rotate left true C
Rotate right true C
Reset Stack Pointer
Substract with Carry
Set carry flag
Disable Interrupts
Shift left Arithmetic
Shift left Logic
Shift right Logic
Shift right Arithmetic
Substraction
SWAP nibbles
Test for Neg & Zero
S/W trap
Wait for Interrupt
Exclusive OR
Function/Example
Unsigned <=
dst <= src
X,A = X * A
neg $10
Dst
reg, M
A, X, Y
reg, M
Src
M, reg
X, Y, A
A=A+M
pop reg
pop CC
push Y
C=0
A
M
reg
M
CC
M
M
reg, CC
I1:0 = 10 (level 0)
C <= A <= C
C => A => C
S = Max allowed
A=A-M-C
C=1
I1:0 = 11 (level 3)
C <= A <= 0
C <= A <= 0
0 => A => C
A7 => A => C
A=A-M
A7-A4 <=> A3-A0
tnz lbl1
S/W interrupt
reg, M
reg, M
A
M
reg, M
reg, M
reg, M
reg, M
A
M
reg, M
A = A XOR M
A
M
I1 H I0 N Z C
NZ
0
0
NZC
NZ
I1 H I0 N Z C
0
1
0
NZC
NZC
NZC
1
1
1
NZC
NZC
0 ZC
NZC
NZC
NZ
NZ
1
1
1
0
NZ
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