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MOVX
The MOVX instruction transfers data between the accumulator and external data memory. External memory may be addressed via 16-bits in the DPTR register or via 8-bits in the R0 or R1 registers. When using 8-bit addressing, Port 2 must contain the high-order byte of the address.
| MOVX @Ri, A | ||||||||
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| Bytes | 1 | |
| Cycles | 2 | |
| Encoding |
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| Operation |
MOVX (Ri) = A |
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| Example |
MOVX @R0, A |
| MOVX A, @DPTR | ||||||||
|
| Bytes | 1 | |
| Cycles | 2 | |
| Encoding |
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|
| Operation |
MOVX A = (DPTR) |
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| Example |
MOVX A, @DPTR |
| MOVX A, @Ri | ||||||||
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| Bytes | 1 | |
| Cycles | 2 | |
| Encoding |
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|
| Operation |
MOVX A = (Ri) |
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| Example |
MOVX A, @R1 |
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