ST72521 STMICROELECTRONICS [STMicroelectronics], ST72521 Datasheet - Page 161

• Manufacturer Part Number: ST72521
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

INSTRUCTION SET OVERVIEW (Cont’d)
Mnemo
JRULE
LD
MUL
NEG
NOP
OR
POP
PUSH
RCF
RET
RIM
RLC
RRC
RSP
SBC
SCF
SIM
SLA
SLL
SRL
SRA
SUB
SWAP
TNZ
TRAP
WFI
XOR
Jump if (C + Z = 1)
Load
Multiply
Negate (2’s compl)
No Operation
OR operation
Pop from the Stack
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
Description
Unsigned <=
dst <= src
X,A = X * A
neg $10
A = A + M
pop reg
pop CC
push Y
C = 0
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
A = A XOR M
Function/Example
reg, M
A, X, Y
reg, M
A
reg
CC
M
reg, M
reg, M
A
reg, M
reg, M
reg, M
reg, M
A
reg, M
A
Dst
M, reg
X, Y, A
M
M
M
reg, CC
M
M
M
Src
I1
I1
1
1
1
1
H
H
0
I0
I0
0
1
1
0
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
0
ST72521
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
161/211
C
C
C
C
C
C
C
C
C
C
C
0
0
1