MC68HC705P9 Datasheet, PDF(107/160 Page) Motorola, Inc – HCMOS Microcontroller Unit　

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MC68HC705P9 Datasheet, PDF (107/160 Pages) Motorola, Inc – HCMOS Microcontroller Unit　

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Freescale Semiconductor, Inc.

Timer

Timing

INTERNAL

BUS CLOCK

ï£±

ï£´

T00

ï£´

ï£´

ï£´

ï£´

T01

TIMER

CLOCKS

ï£²

ï£´

ï£´ T10

ï£´

ï£´

ï£´

ï£³ï£´

T11

16-BIT $FFEB

COUNTER

OUTPUT COMPARE

REGISTERS

$FFEC

CPU WRITES $FFED

$FFED

$FFEE

$FFED

$FFEF

COMPARE

REGISTER LATCH

OUTPUT COMPARE

FLAG AND TCMP

NOTES:

1. A write to the output compare registers may occur at any time, but a compare only occurs at

timer state T01. Therefore, the compare may follow the write by up to four cycles.

2. The output compare flag is set at the timer state T11 that follows the comparison latch.

Figure 9-8. Output Compare Timing

INTERNAL

BUS CLOCK

ï£±

ï£´

T00

ï£´

ï£´

ï£´ T01

TIMER

ï£´

ï£²

CLOCKS ï£´

ï£´ T10

ï£´

ï£´

ï£´

ï£³ï£´

T11

16-BIT

COUNTER

OVERFLOW

FLAG (TOF)

$FFFF

$0000

$0001

Figure 9-9. Timer Overflow Timing

$0002

MC68HC705P9 â Rev. 4.0

MOTOROLA

Timer

For More Information On This Product,

Go to: www.freescale.com

Technical Data

107

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