M68HC08 datasheet(86/172 Pages) FREESCALE

tên linh kiện	M68HC08

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Timer Interface Module (TIM)

MC68HC908JL3E Family Data Sheet, Rev. 3

Freescale Semiconductor

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.

Figure 8-1. TIM Block Diagram

PRESCALER

PRESCALER SELECT

16-BIT COMPARATOR

PS2

PS1

PS0

16-BIT COMPARATOR

16-BIT LATCH

TCH0H:TCH0L

MS0A

ELS0B

ELS0A

TOF

TOIE

16-BIT COMPARATOR

16-BIT LATCH

TCH1H:TCH1L

CHANNEL 0

CHANNEL 1

TMODH:TMODL

TRST

TSTOP

TOV0

CH0IE

CH0F

ELS1B

ELS1A

TOV1

CH1IE

CH1MAX

CH1F

CH0MAX

MS0B

16-BIT COUNTER

MS1A

INTERNAL

BUS CLOCK

TCH1

TCH0

INTERRUPT

LOGIC

PORT

LOGIC

INTERRUPT

LOGIC

INTERRUPT

LOGIC

PORT

LOGIC

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