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

No. de pieza M68ICS08GR
Descripción Electrónicos  M68HC08 Microcontrollers
PDF  408 Pages
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Fabricante Electrónico  FREESCALE [Freescale Semiconductor, Inc]
Página de inicio  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

M68ICS08GR Datasheet(HTML) 68 Page - Freescale Semiconductor, Inc

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Resets and Interrupts
Technical Data
MC68HC908GR8 — Rev 4.0
68
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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