Maxim Integrated MAXQ622 User Manual
Page 227
MAXQ612/MAXQ622 User’s Guide
Maxim Integrated
16-17
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