Maxim Integrated MAXQ610 - Manual (Page 179)

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MAXQ610 User’s Guide
Data Transfer Rules
dst (16-bit)
← src (16-bit): dst[15:0] ← src[15:0]
dst (8-bit) ← src (8-bit): dst[7:0] ← src[7:0]
dst (16-bit) ← src (8-bit): dst[15:8] ← 00h *
dst[ 7:0] ← src[7:0]
dst (8-bit) ← src (16-bit): dst[7:0] ← src[7:0]
* Note: The PFX[0] register may be used to supply a separate high order data byte for this type of
transfer .
Example(s): MOVE A[0], A[3] ; A[0] ← A[3]
MOVE DP[0], #110h ; DP[0] ← #0110h (PFX[0] register used)
; MOVE PFX[0], #01h (smart-prefixing)
; MOVE DP[0], #10h
MOVE DP[0], #80h ; DP[0] ← #0080h (PFX[0] register not needed)
Special
Notes:
Proper loading of the PFX[n] registers, when for the purpose of supplying 16-bit immediate data
or accessing 2-cycle destinations, is handled automatically by the assembler and is therefore an
optional step for the user when writing assembly source code . Examples of the automatic PFX[n]
code insertion by the assembler are demonstrated below .
Initial Assembly Code
Assembler Output
MOVE DP[0], #0100h MOVE PFX[0], #01h
MOVE DP[0], #00h
MOVE A[15], A[7] MOVE PFX[2], anysrc
MOVE A[7], A[7]
MOVE A[8], #3040h MOVE PFX[2], #30h
MOVE A[0], #40h
MOVE Acc., C Move Carry Flag to Accumulator Bit
Description: Replaces the specified bit of the active accumulator with the Carry bit .
Status Flags: S, Z
Operation:
Acc. ← C
Encoding: 15 0
1111 1010 bbbb 1010
Example(s): ; Acc = 8000h, S=1, Z=0, C=0
MOVE Acc .15, C ; Acc = 0000h, S=0, Z=1
MOVE C, Acc. Move Accumulator Bit to Carry Flag
Description: Replaces the Carry (C) status flag with the specified active accumulator bit .
Status Flag: C
Operation: C ← Acc .
Encoding: 15 0
1110 1010 bbbb 1010
Example(s): ; Acc = 01C0h, C=0
MOVE C, Acc .8 ; C =1