7546 查看數據表（PDF） - Renesas Electronics

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7546

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Renesas Electronics 

7546 Group

On-going Routine

Store Return Address

on Stack

Interrupt request

(Note)

Execute JSR

M (S) (PCH)

(S) (S – 1)

M (S) (PCL)

(S) (S – 1)

Subroutine

Restore Return

Address

Execute RTS

(S) (S + 1)

(PCL) M (S)

(S) (S + 1)

(PCH) M (S)

M (S) (PCH)

(S) (S – 1)

M (S) (PCL)

Store Return Address

on Stack

(S) (S – 1)

M (S) (PS)

Store Contents of Processor

Status Register on Stack

(S) (S – 1)

Interrupt

Service Routine

Execute RTI

(S) (S + 1)

(PS) M (S)

I Flag “0” to “1”

Fetch the Jump Vector

Restore Contents of

Processor Status Register

(S) (S + 1)

(PCL) M (S)

(S) (S + 1)

Restore Return

Address

(PCH) M (S)

Note : The condition to enable the interrupt Interrupt enable bit is “1”

Interrupt disable flag is “0”

Fig. 9 Register push and pop at interrupt generation and subroutine call

Table 4 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

Rev.1.21 Nov 15, 2006 page 11 of 93

REJ03B0160-0121

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