7470 datasheet(32/361 Pages) RENESAS

tên linh kiện	7470

Giải thích chi tiết về linh kiện	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES

PDF	361 Pages

Scroll/Zoom	100%

nhà sản xuất	RENESAS [Renesas Technology Corp]

Trang chủ	http://www.renesas.com

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7470/7471/7477/7478 GROUP USER’S MANUAL

HARDWARE

1.7 Central processing unit (CPU)

1-25

Fig. 1.7.2 Register push and pop at interrupt generation and subroutine call

Note : Condition for acceptance of an interrupt • • •

Interrupt disable flag is “0” (enable state)

Interrupt enable bit is “1” (enable state)

On-going routine

• • • • • •

M(S)

(PCH)

(S)

(S)–1

M(S)

(PCL)

(S)

(S)–1

(S)

(S)+1

(PCL)

M(S)

(S)

(S)+1

(PCH)

M(S)

(PCH)

M(S)

(S)

(S)+1

(PCL)

M(S)

(S)

(S)+1

(PS)

M(S)

(S)

(S)+1

Interrupt Service

Routine

(S)

(S)–1

M(S)

(PS)

(S)

(S)–1

M(S)

(PCL)

(S)

(S)–1

M(S)

(PCH)

Execute JSR

Execute RTI

•

Push return

address on

stack

Pop return

address from

stack

Pop contents of

Processor status

Pop return

address from stack

Push contents of

Processor status

Push return address

on stack

When a subroutine is called

When an interrupt is accepted

Interrupt request (Note)

I Flag is set from

“0” to “1”

Fetch the Jump

Vector

: Operation which is automatically performed by hardware

: Operation instructed by software

Subroutine

Execute RTS

•

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