Maxim Integrated DS4830A Optical Microcontroller - Manual (Page 220)

DS4830A User’s Guide
220
RET C / RET NC Conditional Return on Status Flag
RET Z / RET NZ
RET S
Description:
Performs conditional return (RET) based upon the state of a specific processor status flag.
RET C returns if the Carry flag is set while RET NC returns if the Carry flag is clear. RET Z
returns if the Zero flag is set while RET NZ returns if the Zero flag is clear. RET S returns if
the Sign flag is set. See RET for additional information on the return operation.
Status Flags: None
RET C
Operation:
C=1: IP  @SP--
C=0: IP  IP + 1
Encoding:
15 0
1010 1100 0000 1101
Example(s):
RET C ; C=1, return (RET) is performed.
RET NC
Operation:
C=0: IP  @SP--
C=1: IP  IP +1
Encoding:
15 0
1110 1100 0000 1101
Example(s):
RET NC ; C=1, return (RET) does not occur
RET Z
Operation:
Z=1: IP  @SP--
Z=0: IP  IP + 1
Encoding:
15 0
1001 1100 0000 1101
Example(s):
RET Z ; Z=0, return (RET) does not occur
RET NZ
Operation:
Z=0: IP  @SP--
Z=1: IP  IP + 1
Encoding:
15 0
1101 1100 0000 1101
Example(s):
RET NZ ; Z=0, return (RET) is performed
RET S
Operation:
S=1: IP  @SP--
S=0: IP  IP + 1
Encoding:
15 0
1100 1100 0000 1101
Example(s):
RET S ; S=0, return (RET) does not occur