SM8954B
8-Bit Micro-controller
16KB Flash
& 1KB RAM embedded
Table 2-3: Data transfer
Mnemonic
MOV A,Rn
Description
Code
Bytes Cycles
Move register to accumulator
E8-EF
E5
1
2
1
2
1
2
2
2
2
3
2
3
1
2
2
3
1
1
1
1
1
1
2
2
1
2
1
1
1
1
MOV A,direct
Move direct byte to accumulator
1
1
1
MOV A,@Ri
Move indirect RAM to accumulator
Move immediate data to accumulator
Move accumulator to register
E6-E7
74
MOV A,#data
MOV Rn,A
F8-FF
A8-AF
78-7F
F5
MOV Rn,direct
MOV Rn,#data
MOV direct,A
Move direct byte to register
2
1
1
2
2
2
Move immediate data to register
Move accumulator to direct byte
MOV direct,Rn
MOV direct1,direct2
MOV direct,@Ri
MOV direct,#data
MOV @Ri,A
Move register to direct byte
88-8F
85
Move direct byte to direct byte
Move indirect RAM to direct byte
Move immediate data to direct byte
Move accumulator to indirect RAM
Move direct byte to indirect RAM
Move immediate data to indirect RAM
Load data pointer with a 16-bit constant
Move external RAM (8-bit addr.) to A
Move external RAM (16-bit addr.) to A
Move A to external RAM (8-bit addr.)
Move A to external RAM (16-bit addr.)
Move code byte relative to DPTR to accumulator
Move code byte relative to PC to accumulator
Push direct byte onto stack
86-87
75
2
1
2
F6-F7
A6-A7
76-77
90
MOV @Ri,direct
MOV @Ri,#data
MOV DPTR,#data16
MOVX A,@Ri
MOVX A,@DPTR
MOVX @Ri,A
MOVX @DPTR,A
MOVC A,@A+DPTR
MOVC A,@A+PC
PUSH direct
1
2
2
E2-E3
E0
2
2
2
2
F2-F3
F0
93
2
2
2
1
1
1
1
83
C0
POP direct
Pop direct byte from stack
D0
XCH A,Rn
Exchange register with accumulator
Exchange direct byte with accumulator
Exchange indirect RAM with accumulator
Exchange low-order nibble indir. RAM with A
C8-CF
C5
XCH A,direct
XCH A,@Ri
C6-C7
D6-D7
XCHD A,@Ri
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M083 Ver A SM8954B 3/7/2014
- 15 -
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
