Z86D73 Datasheet, PDF (58/92 Pages) Zilog, Inc. – 40/44/48-Pin Low-Voltage IR OTP

Z86D73
40/44/48-Pin Low-Voltage IR OTP
52
Enable
TC8
Enable
Timeout
Ping-Pong
CTR1 D3,D2
TC16
Timeout
Figure 29. Ping-Pong Mode
Initiating Ping-Pong Mode
First, make sure both counter/timers are not running. 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 particular
order. Finally, start Ping-Pong Mode by enabling either T8 (CTR0, D7) or T16
(CTR2, D7). See Figure 30.
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 30. 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.
PS019402-1103
PRELIMINARY