SM39R08A5
8-Bit Micro-controller
with 8KB Flash
& 256B RAM embedded
2. Instruction Set
All SM39R08A5 instructions are binary code compatible and perform the same functions as they do with the industry
standard 8051. The following tables give a summary of the instruction set cycles of the SM39R08A5 Microcontroller core.
Table 2-1: Arithmetic operations
Description
Add register to accumulator
Add direct byte to accumulator
Add indirect RAM to accumulator
Add immediate data to accumulator
Add register to accumulator with carry flag
Add direct byte to A with carry flag
Add indirect RAM to A with carry flag
Add immediate data to A with carry flag
Subtract register from A with borrow
Subtract direct byte from A with borrow
Subtract indirect RAM from A with borrow
Subtract immediate data from A with borrow
Increment accumulator
Increment register
Increment direct byte
Increment indirect RAM
Increment data pointer
Decrement accumulator
Decrement register
Decrement direct byte
Decrement indirect RAM
Multiply A and B
Divide A by B
Decimal adjust accumulator
Mnemonic
ADD A,Rn
ADD A,direct
ADD A,@Ri
ADD A,#data
ADDC A,Rn
ADDC A,direct
ADDC A,@Ri
ADDC A,#data
SUBB A,Rn
SUBB A,direct
SUBB A,@Ri
SUBB A,#data
INC A
INC Rn
INC direct
INC @Ri
INC DPTR
DEC A
DEC Rn
DEC direct
DEC @Ri
MUL AB
DIV
DA A
Code
28-2F
25
26-27
24
38-3F
35
36-37
34
98-9F
95
96-97
94
04
08-0F
05
06-07
A3
14
18-1F
15
16-17
A4
84
D4
Bytes
1
2
1
2
1
2
1
2
1
2
1
2
1
1
2
1
1
1
1
2
1
1
1
1
Cycles
1
2
2
2
1
2
2
2
1
2
2
2
1
2
3
3
1
1
2
3
3
5
5
1
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M067
Ver B SM39R08A5 04/22/2013
- 13 -
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
