Maxim-integrated DS4830 Optical Microcontroller Manual do Utilizador descarregar pdf (Página 196)

DS4830 User’s Guide

196

CMP src Compare Accumulator

Description: Compare for equality between the active accumulator and the least significant byte of the

specified src.

Because the source is limited to 8 bits, the PFX[n] register is used to supply the

high-byte of data for 16 bit sources.

Status Flags: E

Operation: Acc = src: E  1

Acc <> src: E  0

Encoding: 15 0

f111

1000

Ssss

ssss

Example(s): CMP #45h ; Acc = 0145h, E=0

CMP #145h ; PFX[0] register used

; MOVE PFX[0], #01h (smart-prefixing)

; CMP #45h E=1

CPL Complement Acc

Description: Performs a logical bitwise complement (1’s complement) on the active accumulator (Acc or

A[AP]) and returns the result to the active accumulator.

Status Flags: S, Z

Operation: Acc  ~Acc

Encoding: 15 0

1000

1010

0001

1010

Example(s): ; Acc = FFFFh, S=1, Z=0

CPL ; Acc  0000h, S=0, Z=1

; Acc = 0990h, S=0, Z=0

CPL ; Acc  F66Fh, S=1, Z=0

CPL C Complement Carry Flag

Description: Logically complements the Carry (C) Flag.

Status Flag: C

Operation: C  ~C

Encoding: 15 0

1101

1010

0010

1010

Example(s): ; C = 0

CPL C ; C  1

1 2 ... 191 192 193 194 195 196 197 198 199 200 201 ... 226 227

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