M37516E2-XXXHP Ver la hoja de datos (PDF) - Renesas Electronics

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M37516E2-XXXHP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Renesas Electronics 

7516 Group

On-going Routine

Push return address

on stack

Interrupt request

(Note)

M (S) (PCH)

Execute JSR

(S) (S) – 1

M (S) (PCL)

(S) (S)– 1

Subroutine

POP return

address from stack

Execute RTS

(S) (S) + 1

(PCL) M (S)

(S) (S) + 1

(PCH) M (S)

M (S) (PCH)

(S) (S) – 1

M (S) (PCL)

Push return address

on stack

(S) (S) – 1

M (S) (PS)

Push contents of processor

status register on stack

(S) (S) – 1

Interrupt

Service Routine

Execute RTI

I Flag is set from “0” to “1”

Fetch the jump vector

(S) (S) + 1

(PS) M (S)

POP contents of

processor status

register from stack

(S) (S) + 1

(PCL) M (S)

(S) (S) + 1

POP return

address

from stack

(PCH) M (S)

Note: Condition for acceptance of an interrupt Interrupt enable flag is “1”

Interrupt disable flag is “0”

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

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

Push instruction to stack

Accumulator

Processor status register

PHA

PHP

Pop instruction from stack

PLA

PLP

Rev.1.01 Jul 01, 2003 page 8 of 89

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