Maxim-integrated MAXQ622 Bedienungsanleitung PDF herunterladen (Seite 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:

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:

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:

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:

1101 1100 0000 1101

Example(s):

RET NZ ; Z=0, return (RET) is performed

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