TIMER/COUNTER UNIT

Timer 0 Timer 1 Timer 2

Timer 0 Timer 1 Timer 2

Timer 0

ServicedServiced Serviced

Dead Serviced Serviced Serviced

Dead Serviced

3

1

T0IN

2

4

5

T1IN

T0OUT

T1OUT

NOTES:

1.T0IN resolution time (setup time met).

2.T1IN resolution time (setup time not met).

3.Modified count value written into Timer 0 count register.

4.T1IN resolution time, count value written into Timer 1 count register.

5.T1IN resolution time.

A1293-0A

Figure 9-2. Counter Element Multiplexing and Timer Input Synchronization

9-3

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Intel 80C188XL, 80C186XL user manual T0IN T1IN T0OUT T1OUT, Counter Element Multiplexing and Timer Input Synchronization