MC68HC705P9 Datasheet, PDF(97/156 Page) Motorola, Inc – HCMOS Microcontroller Unit　

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MC68HC705P9 Datasheet, PDF (97/156 Pages) Motorola, Inc – HCMOS Microcontroller Unit　

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Timer

Timing

INTERNAL

BUS CLOCK

ï£±

ï£´

T00

ï£´

ï£´

ï£´

ï£´

T01

TIMER ï£²

CLOCKS

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 ï¬ag is set at the timer state T11 that follows the comparison latch.

Figure 8. Output Compare Timing

INTERNAL

BUS CLOCK

ï£±

ï£´

T00

ï£´

ï£´

TIMER

ï£´

ï£´

T01

ï£²

CLOCKS ï£´

ï£´ T10

ï£´

ï£´

ï£´

ï£³ï£´

T11

16-BIT

COUNTER

OVERFLOW

FLAG (TOF)

$FFFF

$0000

$0001

Figure 9. Timer Overflow Timing

$0002

9-tim1ic1oc_a

MOTOROLA

Timer

97

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