Maxim Integrated DS4830A Optical Microcontroller User Manual
Page 229
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DS4830A User’s Guide
229
XCH
Exchange Accumulator Bytes
Description:
Exchanges the upper and lower bytes of the active accumulator.
Status Flags:
S
Operation:
Acc.[15:8]
Acc.[7:0]
Acc.[7:0]
Acc.[15:8]
Encoding:
15
0
1000
1010
1000
1010
Example(s):
; Acc = 2345h
XCH
; Acc = 4523h
XCHN
Exchange Accumulator Nibbles
Description:
Exchanges the upper and lower nibbles in the active accumulator byte(s).
Status Flags:
S
Operation:
Acc.[7:4]
Acc.[3:0]
Acc.[3:0]
Acc.[7:4]
Acc.[15:12]
Acc.[11:8]
Acc.[11:8]
Acc.[15:12]
Encoding:
15
0
1000
1010
0111
1010
Example(s):
; Acc = 2345h
XCHN
; Acc = 3254h
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