Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 222)

MAXQ612/MAXQ622 User’s Guide

16-12 Maxim Integrated

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.<b>, 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.<b> ← C

Encoding:

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.<b> Move Accumulator Bit to Carry Flag

Description:

Replaces the Carry (C) status flag with the specified active accumulator bit.

Status Flag:

Operation:

C ← Acc.<b>

Encoding:

1110 1010 bbbb 1010

Example(s):

; Acc = 01C0h, C=0

MOVE C, Acc.8 ; C =1

1 2 ... 217 218 219 220 221 222 223 224 225 226 227 ... 254 255

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