AM186ES Advanced Micro Devices, AM186ES Datasheet - Page 131

• Manufacturer Part Number: AM186ES
• Description: microcontrollers provide a low-cost/ high-performance solution for embedded system designers who wish to use the x86 architecture.
• Manufacturer: Advanced Micro Devices

8.3.5
Figure 8-5
Timer Maxcount Compare Registers
(T0CMPA, Offset 52h, T0CMPB, Offset 54h, T1CMPA, Offset 5Ah,
T1CMPB, Offset 5Ch, T2CMPA, Offset 62h)
These registers serve as comparators for their associated count registers. Timer 0 and
timer 1 each have two maximum count compare registers. See Figure 8-5.
Timer 0 and timer 1 can be configured to count and compare to register A and then count
and compare to register B. Using this method, the TMROUT0 or TMROUT1 signals can
be used to generate wave forms of various duty cycles.
Timer 2 has one compare register, T2CMPA.
If a maximum count compare register is set to 0000h, the timer associated with that compare
register will count from 0000h to FFFFh before requesting an interrupt. With a 40-MHz
clock, a timer configured this way interrupts every 6.5536 ms.
Timer Maxcount Compare Registers
The value of these registers at reset is undefined.
Bits 15–0: Timer Compare Value (TC15–TC0)—This register contains the maximum
value a timer will count to before resetting its count register to 0.
15
Timer Control Unit
TC15–TC0
7
0
8-7