MC68HC705P9CS datasheet(109/160 Pages) FREESCALE

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Timer

I/O Registers

MC68HC705P9 — Rev. 4.0

Technical Data

MOTOROLA

Timer

109

9.7.1 Timer Control Register

The timer control register (TCR) performs the following functions:

•

Enables input capture interrupts

•

Enables output compare interrupts

•

Enables timer overflow interrupts

•

Controls the active edge polarity of the TCAP signal

•

Controls the active level of the TCMP output

ICIE — Input Capture Interrupt Enable

This read/write bit enables interrupts caused by an active signal on

the PD7/TCAP pin. Reset clears the ICIE bit.

1 = Input capture interrupts enabled

0 = Input capture interrupts disabled

OCIE — Output Compare Interrupt Enable

This read/write bit enables interrupts caused by an active signal on

the TCMP pin. Reset clears the OCIE bit.

1 = Output compare interrupts enabled

0 = Output compare interrupts disabled

TOIE — Timer Overflow Interrupt Enable

This read/write bit enables interrupts caused by a timer overflow.

Reset clears the TOIE bit.

1 = Timer overflow interrupts enabled

0 = Timer overflow interrupts disabled

$0012

Bit 7

54321

Bit 0

Read:

ICIE

OCIE

TOIE

IEDG

OLVL

Write:

Reset:

0000

U = Unaffected

Figure 9-10. Timer Control Register (TCR)

Freescale Semiconductor, Inc.

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MC68HC705P9CS Datasheet(PDF) 109 Page - Freescale Semiconductor, Inc

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