Oki MSM85C154HVS - Page 340

DESCRIPTION OF INSTRUCTIONS
333
74. MOVX A, @DPTR
(Move external memory addressed by data pointer to accumulator)
11100000
70
Instruction code
Operation
Number of bytes
Number of cycles
Flags
(PSW)
Description
Example MOVX A, @DPTR
Instruction code
: Byte 1
(A)←((DPTR)):
C AC F0 RS1 RS0 OV F1 P
•
:
:
:
External data memory (RAM) contents addressed by the data
pointer are stored in the accumulator, and the flag is updated.
:
1
2
11100000
70
Byte 1
Before execution After execution
:
DPH
15 8
0101011110101111
70
DPH
15 8
0101011110101111
70
Accumulator
11111111
70
Accumulator
10111010
70
57AFH
10111010
70
57AFH
10111010
70
DPL DPL