Freescale Semiconductor MC68HC08KH12 manual Port-E Keyboard Interrupt Block Diagram, 228

228

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15.5 Port-E Keyboard Interrupt Block Diagram

INTERNAL BUS

KBE0

VDD

ACKE

RESET

VECTOR FETCH

DECODER

KEYEF

KBEIE0

TO PULLUP ENABLE PEPE0

KBE3

.

.

.

D CLR Q

CK

KEYBOARD

INTERRUPT FF

SYNCHRONIZER

IMASKE

Port-E

Keyboard

Interrupt

Request

KBEIE3

TO PULLUP ENABLE PEPE3

MODEE

Freescale Semiconductor

MC68HC(7)08KH12 — Rev. 1.1

Figure 15-4. Port-E Keyboard Interrupt Block Diagram