DR805x Instructions set details
- 9 -
2.2.4. DATA TRANSFERS
Mnemonic
MOV A,Rn
Description
Code
0xE8-0xEF
0xE5
0xE6-0xE7
0x74
0xF8-0xFF
0xA8-0xAF
0x78-0x7F
Bytes Cycles
Move register to accumulator
Move direct byte to accumulator
Move indirect RAM to accumulator
Move immediate data to accumulator
Move accumulator to register
Move direct byte to register
1
2
1
2
1
2
2
1
2
2
2
2
4
2
2
3
MOV A,direct
MOV A,@Ri
MOV A,#data
MOV Rn,A
MOV Rn,direct
MOV Rn,#data
Move immediate data to register
SFR byte
RAM byte
SFR byte
RAM byte
SFR byte
RAM byte
SFR byte
RAM byte
MOV direct,A
Move accumulator to direct
Move register to direct
0xF5
0x88-8F
85
2
2
3
2
2
3
3
4
3
4
MOV direct,Rn
MOV direct1,direct2 Move direct byte to direct
MOV direct,@Ri
Move indirect RAM to direct
86-87
MOV direct,#data
MOV @Ri,A
MOV @Ri,direct
MOV @Ri,#data
Move immediate data to direct byte
Move accumulator to indirect RAM
Move direct byte to indirect RAM
Move immediate data to indirect RAM
75
F6-F7
A6-A7
76-77
90
93
83
E2-E3
E0
F2-F3
F0
3
1
2
2
3
1
1
1
1
1
1
2
3
3
4
3
3
MOV DPTR,#data16 Load data pointer with a 16-bit constant
MOVC A,@A+DPTR Move code byte relative to DPTR to accumulator
MOVC A,@A+PC
MOVX A,@Ri
MOVX A,@DPTR
MOVX @Ri,A
MOVX @DPTR,A
PUSH direct
4
4
Move code byte relative to PC to accumulator
Move external RAM (8-bit address) to A
Move external RAM (16-bit address) to A
Move A to external RAM (8-bit address)
Move A to external RAM (16-bit address)
Push direct byte onto stack
3*
2*
4*
3*
4
C0
SFR
Pop direct byte from stack to
RAM
2
3
POP direct
D0
2
XCH A,Rn
Exchange register with accumulator
C8-CF
C5
C6-C7
D6-D7
1
2
1
1
2
3
3
3
XCH A,direct
XCH A,@Ri
XCHD A,@Ri
Exchange direct byte with accumulator
Exchange indirect RAM with accumulator
Exchange low-order nibble indirect RAM with A
Table 6. Data transfer
* MOVX cycles depends on STRETCH register
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