Maxim Integrated MAXQ Family - Manual (Page 214)

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MAXQ Family User’s Guide
(MAXQ20 Only) Exchange Accumulator Bytes
XCH
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
Example(s): ; Acc = 2345h
XCHN ; 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
MAXQ10
Example(s):
; Acc = 23h
XCHN ; Acc = 32h
MAXQ20
Example(s):
; Acc = 2345h
XCHN ; Acc = 3254h
1000 1010 1000 1010
1000 1010 0111 1010
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