M68ICS08GR datasheet(68/408 Pages) FREESCALE

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M68ICS08GR 데이터시트(PDF) 68 Page - Freescale Semiconductor, Inc

부품명	M68ICS08GR

상세설명	M68HC08 Microcontrollers

PDF	408 Pages

Scroll/Zoom	100%

제조업체	FREESCALE [Freescale Semiconductor, Inc]

홈페이지	http://www.freescale.com

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68 / 408 page

Resets and Interrupts

Technical Data

MC68HC908GR8 — Rev 4.0

Resets and Interrupts

MOTOROLA

Figure 4-5

. Interrupt Recognition Example

The LDA opcode is prefetched by both the INT1 and INT2 RTI

instructions. However, in the case of the INT1 RTI prefetch, this is a

redundant operation.

NOTE:

To maintain compatibility with the M6805 Family, the H register is not

pushed on the stack during interrupt entry. If the interrupt service routine

modifies the H register or uses the indexed addressing mode, save the

H register and then restore it prior to exiting the routine.

CLI

LDA

INT1

PULH

RTI

INT2

BACKGROUND

#$FF

PSHH

INT1 INTERRUPT SERVICE ROUTINE

PULH

RTI

PSHH

INT2 INTERRUPT SERVICE ROUTINE

ROUTINE

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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