Port-E Keyboard Interrupt Block Diagram - Freescale Semiconductor MC68HC08KH12 Datasheet

15.5 Port-E Keyboard Interrupt Block Diagram

KBE0
KBEIE0
TO PULLUP ENABLE PEPE0
KBE3
KBEIE3
TO PULLUP ENABLE
PEPE3
V
DD
CLR
.
D
.
CK
.
MODEE
Figure 15-4. Port-E Keyboard Interrupt Block Diagram
INTERNAL BUS
VECTOR FETCH
DECODER
ACKE
RESET
Q
SYNCHRONIZER
KEYBOARD
IMASKE
INTERRUPT FF
KEYEF
Port-E
Keyboard
Interrupt
Request