HC05 Datasheet, PDF (142/232 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit

10
Reset
Is I-bit set?
NO
IRQ or WOI
YES
external interrupt?
NO
Timer
YES
internal interrupt?
NO
SCI
YES
internal interrupt?
NO
CIRQ
YES
MCAN interrupt?
NO
Fetch next
instruction
Execute
instruction
Clear IRQ
request latch
Stack
PC, X, A, CC
Set I-bit
Load PC from:
IRQ: $3FFA-$3FFB
Timer IC: $3FF8-$3FF9
Timer OC: $3FF6-$3FF7
Timer OVF:$3FF4-$3FF5
SCI:
$3FF2-$3FF3
MCAN: $3FF0-$3FF1
Complete interrupt
routine and execute
RTI
Figure 10-4 Interrupt flow chart
MOTOROLA
10-8
RESETS AND INTERRUPTS
MC68HC05X16
Rev. 1