Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Instrukcja Użytkownika Pobierz pdf (Strona 155)

7 DETAILS OF INSTRUCTIONS

S1C33 FAMILY C33 PE CORE MANUAL

EPSON

147

reti

Function

Return from trap handler routine

Standard) pc

← W[sp + 4], psr ← W[sp], sp ← sp + 8

Extension 1) Unusable

Extension 2) Unusable

Code

15 12 11 8 7 4 3 0

0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0

0x04C0

Flag

IE C V Z N

↔ ↔ ↔ ↔ ↔

Mode

–

CLK

Five cycles

Description

Restore the contents of the PC and PSR that were saved to the stack when an exception or interrupt

occurred to the respective registers, and return from the trap handler routine. The SP is incremented

by an amount equivalent to 2 words.

Example

reti ; Return from a trap handler routine

1 2 ... 150 151 152 153 154 155 156 157 158 159 160 ... 180 181

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Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Instrukcja Użytkownika Strona 155