Z86L81 Datasheet, PDF (53/88 Pages) Maxim Integrated Products – 28-Pin Low-Voltage Infrared Microcontrollers

Z86L81/86/98
28-Pin Low-Voltage Infrared Microcontrollers
47
Enable
TC8
Enable
Timeout
Ping-Pong
CTR1 D3,D2
TC16
Timeout
Figure 24. Ping-Pong Mode
Initiating Ping-Pong Mode
First, make sure both counter/timers are not running. Then, set T8 into Single-
Pass Mode (CTR0 D6), set T16 into Single-Pass Mode (CTR2 D6), and set the
Ping-Pong Mode (CTR1 D2, D3). These instructions do not have to be in any par-
ticular order. Finally, start Ping-Pong Mode by enabling either T8 (CTR0 D7) or
T16 (CTR2 D7). See Figure 25.
P34_INTERNAL
MUX
P34
T16_OUT
CTR1, D2
T8_OUT
MUX
CTR1 D3
CTR0 D0
AND/OR/NOR/NAND
Logic
P36_INTERNAL
MUX
P36
CTR1 D6
CTR1 D5, D4
P35_INTERNAL
MUX
P35
Figure 25. Output Circuit
CTR2 D0
The initial value of T8 or T16 must not be 1. If you stop the timer and start the
timer again, reload the initial value to avoid an unknown previous value.
19-4615; Rev 0; 4/09