Maxim-integrated MAXQ622 Bedienungsanleitung PDF herunterladen (Seite 214)

MAXQ612/MAXQ622 User’s Guide

16-4 Maxim Integrated

AND src Logical AND

Description:

Performs a logical-AND between the active accumulator (Acc) and the specified src data. For the

complete list of src specifiers, reference the MOVE instruction. The PFX[n] register may be used to

supply the high byte of data for 8-bit sources.

Status Flags:

S, Z

Operation:

Acc ← Acc AND src

Encoding:

f001

1010 ssss ssss

Example(s):

; Acc = 2345h for each example

AND A[3] ; A[3]=0F0Fh

; → Acc = 0305h, S=0, Z=0

AND #33h

; → Acc = 0001h

AND #2233h ; generates object code below

; MOVE PFX[0], #22h (smart-prefixing)

; AND #33h

; → Acc = 2201h

MOVE PFX[0], #0Fh

AND M0[8] ; M0[8]=0Fh (assume M0[8] is an 8-bit register)

; → Acc = 0305h

Special Notes:

The active accumulator (Acc) is not allowed as the src for this operation.

AND Acc.<b> Logical AND Carry Flag with Accumulator Bit

Description:

Performs a logical-AND between the Carry (C) status flag and a specified bit of the active accumu-

lator (Acc.<b>) and returns the result to the Carry.

Status Flags:

Operation:

C ← C AND Acc.<b>

Encoding:

1001

1010 bbbb 1010

Example(s):

; Acc = 2345h, C=1 at start

AND Acc.0

; Acc.0=1 → C=1

AND Acc.1

; Acc.1=0 → C=0

AND C, Acc.8

; Acc.8=1 → C=0

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