MC9RS08KA2 Datasheet, PDF (51/132 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 7
Keyboard Interrupt (RS08KBIV1)
7.1 Introduction
The keyboard interrupt (KBI) module provides independently enabled external interrupt sources.
RS08 CORE
BDC
CPU
RS08 SYSTEM CONTROL
RESET AND STOP WAKEUP
MODES OF OPERATION
POWER MANAGEMENT
RTI
COP
WAKEUP
LVD
5-BIT KEYBOARD
INTERRUPT MODULE
(KBI)
ANALOG COMPARATOR
MODULE
(ACMP)
MODULO TIMER
MODULE
(MTIM)
5
ACMP+
ACMP-
TCLK
ACMPO
PTA0/KBIP0/ACMP+ ⁽¹⁾
PTA1/KBIP1/ACMP- ⁽¹⁾
PTA2/KBIP2/TCLK/RESET/V_PP ^{(1),( 2)}
PTA3/ACMPO/BKGD/MS
PTA4/KBIP4 ^(1),(3)
PTA5/KBIP5 ^{(1), (3)}
USER FLASH — 2,048 BYTES
USER RAM — 63 BYTES
INTERNAL CLOCK
SOURCE
(ICS)
V_SS
POWER AND
V_DD
INTERNAL REGULATOR
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
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
MC9RS08KA2 Series Data Sheet, Rev. 2
Freescale Semiconductor
51