Maxim Integrated MAXQ610 - Manual (Page 184)

14-17
MAXQ610 User’s Guide
RET C/RET NC
RET Z/RET NZ
RET S
Conditional Return on Status Flag
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