Datasheet

Timer Interface Module (TIM)
MC68HC908QB8 Data Sheet, Rev. 3
176 Freescale Semiconductor
Figure 16-1. Block Diagram Highlighting TIM Block and Pins
16.3.2 Input Capture
With the input capture function, the TIM can capture the time at which an external event occurs. When an
active edge occurs on the pin of an input capture channel, the TIM latches the contents of the counter into
the TIM channel registers, TCHxH:TCHxL. The polarity of the active edge is programmable. Input
captures can be enabled to generate interrupt requests.
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
PTA0/TCH0/AD0/KBI0
PTA1/TCH1/AD1/KBI1
PTA2/IRQ
/KBI2/TCLK
PTA3/RST
/KBI3
PTA4/OSC2/AD2/KBI4
PTA5/OSC1/AD3/KBI5
4-CHANNEL 16-BIT
TIMER MODULE
KEYBOARD INTERRUPT
MODULE
EXTERNAL INTERRUPT
MODULE
AUTO WAKEUP
LOW-VOLTAGE
INHIBIT
COP
MODULE
10-CHANNEL
10-BIT ADC
ENHANCED SERIAL
PTB0/SCK/AD4
PTB
DDRB
M68HC08 CPU
PTA
DDRA
PTB1/MOSI/AD5
PTB2/MISO/AD6
PTB3/SS
/AD7
PTB4/RxD/AD8
PTB5/TxD/AD9
PTB6/TCH2
PTB7/TCH3
POWER SUPPLY
V
DD
V
SS
CLOCK
GENERATOR
COMMUNICATIONS
INTERFACE MODULE
MODULE
SERIAL PERIPHERAL
INTERFACE
MC68HC908QB8
8192 BYTES
USER FLASH
256 BYTES
USER RAM
MC68HC908QB8
MONITOR ROM
BREAK MODULE
DEVELOPMENT SUPPORT