Reti -23, Ret c/ret nc, reti z/reti nz, reti s -23 – Maxim Integrated MAXQ7666 User Manual
Page 360
MAXQ7665/MAXQ7666 User’s Guide
14-23
RETI
Return from Interrupt
Description:
RETI pops a single word from the stack (@SP) into the Instruction Pointer (IP) and decrements the stack pointer (SP).
Additionally, RETI returns the interrupt logic to a state in which it can acknowledge additional interrupts.
Status Flags:
None
Operation:
IP
← @SP--
INS
← 0
Encoding:
15
0
Example(s):
See RETI
RETI C/RETI NC
Conditional Return from Interrupt on Status Flag
RETI Z/RETI NZ
RETI S
Description:
Performs conditional return (RETI) based upon the state of a specific processor status flag. RETI C returns if the Carry
flag is set while RETI NC returns if the Carry flag is clear. RETI Z returns if the Zero flag is set while RETI NZ returns if
the Zero flag is clear. RETI S returns if the Sign flag is set. See RETI for additional information on the return operation.
Status Flags:
None
RETI C
Operation:
C=1: IP
← @SP--
INS
← 0
C=0: IP
← IP + 1
Encoding:
15
0
Example(s):
RETI C
; C=1, return from interrupt (RETI) is performed
RETI NC
Operation:
C=0: IP
← @SP--
INS
← 0
C=1: IP
← IP +1
Encoding:
15
0
Example(s):
RETI NC
; C=1, return from interrupt (RETI) does not occur
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