s908az32ag2cfue Freescale Semiconductor, Inc, s908az32ag2cfue Datasheet - Page 237

• Manufacturer Part Number: s908az32ag2cfue
• Description: M68hc08 Microcontrollers 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 22
Keyboard Module (KBD)
22.1 Introduction
The keyboard interrupt module (KBD) provides five independently maskable external interrupt pins.
This module is only available on 64-pin package options.
22.2 Features
KBD features include:
Freescale Semiconductor
ENABLE
ENABLE
PULLUP
PULLUP
•
•
•
•
•
KBD0
KBD4
TO
TO
Five Keyboard Interrupt Pins with Separate Keyboard Interrupt Enable Bits and One Keyboard
Interrupt Mask
Hysteresis Buffers
Programmable Edge-Only or Edge- and Level- Interrupt Sensitivity
Automatic Interrupt Acknowledge
Exit from Low-Power Modes
KB0IE
KB4IE
.
.
.
Figure 22-1. Keyboard Module Block Diagram
MODEK
MC68HC908AZ32A Data Sheet, Rev. 2
V
DD
D
CK
CLR
Q
INTERRUPT FF
KEYBOARD
RESET
ACKK
IMASKK
VECTOR FETCH
INTERNAL BUS
DECODER
SYNCHRONIZER
KEYF
KEYBOARD
INTERRUPT
REQUEST
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