Maxim Integrated DS4830A Optical Microcontroller - Manual (Page 207)

DS4830A User’s Guide
207
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