MC908JL3ECPE Datasheet, PDF (82/180 Pages) Freescale Semiconductor, Inc – Microcontrollers

Timer Interface Module (TIM)
8.4 Functional Description
Figure 8-1 shows the structure of the TIM. The central component of the TIM is the 16-bit TIM counter
that can operate as a free-running counter or a modulo up-counter. The TIM counter provides the timing
reference for the input capture and output compare functions. The TIM counter modulo registers,
TMODH:TMODL, control the modulo value of the TIM counter. Software can read the TIM counter value
at any time without affecting the counting sequence.
The two TIM channels are programmable independently as input capture or output compare channels.
INTERNAL
BUS CLOCK
TSTOP
TRST
PRESCALER
16-BIT COUNTER
16-BIT COMPARATOR
TMODH:TMODL
PRESCALER SELECT
PS2
PS1
PS0
CHANNEL 0
16-BIT COMPARATOR
TCH0H:TCH0L
16-BIT LATCH
CHANNEL 1
16-BIT COMPARATOR
TCH1H:TCH1L
16-BIT LATCH
ELS0B ELS0A
CH0F
MS0A
MS0B
ELS1B ELS1A
MS1A
CH1F
TOF
TOIE
TOV0
CH0MAX
CH0IE
TOV1
CH1MAX
CH1IE
Figure 8-1. TIM Block Diagram
INTERRUPT
LOGIC
PORT
LOGIC
TCH0
INTERRUPT
LOGIC
PORT
LOGIC
TCH1
INTERRUPT
LOGIC
MC68HC908JL3E Family Data Sheet, Rev. 4
82
Freescale Semiconductor