MC908QY8CDWE Datasheet, PDF (86/232 Pages) Freescale Semiconductor, Inc – Addendum to MC68HC908QB8, rev. 3

Keyboard Interrupt Module (KBI)
PTA0/TCH0/AD0/KBI0
PTA1/TCH1/AD1/KBI1
PTA2/IRQ/KBI2/TCLK
PTA3/RST/KBI3
PTA4/OSC2/AD2/KBI4
PTA5/OSC1/AD3/KBI5
PTB0/SCK/AD4
PTB1/MOSI/AD5
PTB2/MISO/AD6
PTB3/SS/AD7
PTB4/RxD/AD8
PTB5/TxD/AD9
PTB6/TCH2
PTB7/TCH3
MC68HC908QB8
256 BYTES
USER RAM
M68HC08 CPU
MC68HC908QB8
8192 BYTES
USER FLASH
CLOCK
GENERATOR
KEYBOARD INTERRUPT
MODULE
EXTERNAL INTERRUPT
MODULE
AUTO WAKEUP
MODULE
LOW-VOLTAGE
INHIBIT
4-CHANNEL 16-BIT
TIMER MODULE
COP
MODULE
10-CHANNEL
10-BIT ADC
V_DD
POWER SUPPLY
V_SS
ENHANCED SERIAL
COMMUNICATIONS
INTERFACE MODULE
SERIAL PERIPHERAL
INTERFACE
RST, IRQ: Pins have internal pull up device
All port pins have programmable pull up device
PTA[0:5]: Higher current sink and source capability
DEVELOPMENT SUPPORT
MONITOR ROM
BREAK MODULE
Figure 9-1. Block Diagram Highlighting KBI Block and Pins
9.3.1.1 MODEK = 1
If the MODEK bit is set, the keyboard interrupt inputs are both edge and level sensitive. The KBIPx bit will
determine whether a edge sensitive pin detects rising or falling edges and on level sensitive pins whether
the pin detects low or high levels. With MODEK set, both of the following actions must occur to clear a
keyboard interrupt request:
• Return of all enabled keyboard interrupt inputs to a deasserted level. As long as any enabled
keyboard interrupt pin is asserted, the keyboard interrupt remains active.
MC68HC908QB8 Data Sheet, Rev. 3
84
Freescale Semiconductor