Datasheet

MC9RS08KA2 Series Data Sheet, Rev. 4
Freescale Semiconductor 51
Chapter 7
Keyboard Interrupt (RS08KBIV1)
7.1 Introduction
The keyboard interrupt (KBI) module provides independently enabled external interrupt sources.
Figure 7-1. MC9RS08KA2 Series Block Diagram with KBI Block and Pins Highlighted
7.1.1 Features
The KBI features include:
• Each keyboard interrupt pin has an individual pin enable bit
• Each keyboard interrupt pin is programmable as falling edge (or rising edge) only, or both falling
edge and low level (or both rising edge and high level) interrupt sensitivity
• One software-enabled keyboard interrupt
• Exit from low-power modes
RS08 CORE
USER FLASH — 2,048 BYTES
USER RAM — 63 BYTES
NOTES:
(1) Pins are software configurable with pullup/pulldown device if input port.
(2) Integrated pullup device enabled if reset enabled (RSTPE=1).
(3) These pins are not available in 6-pin package
POWER AND
PTA
V
SS
V
DD
INTERNAL CLOCK
SOURCE
BDC
RS08 SYSTEM CONTROL
RTI
CPU
COP
WAKEUP LVD
RESET AND STOP WAKEUP
MODES OF OPERATION
POWER MANAGEMENT
5-BIT KEYBOARD
INTERRUPT MODULE
PTA0/KBIP0/ACMP+
(1)
PTA1/KBIP1/ACMP-
(1)
PTA2/KBIP2/TCLK/RESET/V
PP
(1),( 2)
PTA3/ACMPO/BKGD/MS
ANALOG COMPARATOR
MODULE
MODULO TIMER
MODULE
PTA4/KBIP4
(1),(3)
PTA5/KBIP5
(1), (3)
INTERNAL REGULATOR
(KBI)
5
TCLK
ACMP-
ACMP+
ACMPO
(ICS)
(ACMP)
(MTIM)