38K2 datasheet(27/358 Pages) RENESAS

Il numero della parte	38K2

Spiegazioni elettronici	RENESAS 8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES

PDF	358 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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FUNCTIONAL DESCRIPTION

Rev.2.00

Oct 15, 2006

page 8 of 130

38K2 Group

REJ09B0338-0200

HARDWARE

Table 3 Push and pop instructions of accumulator or processor status register

Accumulator

Processor status register

Push instruction to stack

PHA

PHP

Pop instruction from stack

PLA

PLP

Fig. 6 Register push and pop at interrupt generation and subroutine call

Note: Condition for acceptance of an interrupt

Interrupt enable flag is “1”

Execute JSR

On-going Routine

M (S)(PCH)

(S)

(S) – 1

M (S)(PCL)

Execute RTS

(PCL)M (S)

(S)

(S)– 1

(S)

(S) + 1

(S)

(S) + 1

(PCH)M (S)

Subroutine

POP return

address from stack

Push return address

on stack

M (S)(PS)

Execute RTI

(PS)

M (S)

(S)

(S) – 1

(S)

(S) + 1

Interrupt

Service Routine

POP contents of

processor status

M (S)

(PCH)

(S)

(S) – 1

M (S)

(PCL)

(S)

(S) – 1

(PCL)M (S)

(S)

(S) + 1

(S)

(S) + 1

(PCH)M (S)

POP return

address

from stack

I Flag is set from “0” to “1”

Fetch the jump vector

Push return address

on stack

Push contents of processor

status register on stack

Interrupt request

(Note)

Interrupt disable flag is “0”

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