MC68HC05F8 Datasheet, PDF (39/126 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor(HCMOS) microcontroller unit

Freescale Semiconductor, Inc.
From reset
Y
Is I bit set ?
N
IRQx external
Y
interrupt ?
Stack
PC, X, A, CCR
N
Set I bit
5
Timer B underflow ^Y
interrupt ?
N
Timer A internal
Y
interrupt ?
N
Load PC from
interrupt vectors
Complete interrupt routine
and
execute RTI
SPI internal
Y
interrupt ?
N
Manchester
Y
encoder/decoder
interrupt ?
N
Keyboard external ^Y
interrupt ?
N
Fetch next instruction
Execute instruction
Figure 5-2 Hardware Interrupt Flowchart
MC68HC05F8
INTERRUPTS
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TPG
MOTOROLA
5-3