Z86C72 Datasheet, PDF (47/71 Pages) Zilog, Inc. – IR MICROCONTROLLER

Zilog
Z86C72/C92/L72/L92
IR Microcontroller
To Initiate Ping-Pong Mode
During Ping-Pong Mode
First, make sure both counter/timers are not running. Then The enable bits of T8 and T16 (CTR0 D7, CTR2 D7) will
set T8 into Single-Pass Mode (CTR0 D6), set T16 into Sin-
gle-Pass Mode (CTR2 D6), and set Ping-Pong Mode
alternately be set and cleared by hardware. The time-out
bits (CTR0 D5, CTR2 D5) will be set every time the
1
(CTR1 D2, D3). These instructions do not have to be in counter/timers reach the terminal count.
any particular order. Finally, start Ping-Pong Mode by en-
abling either T8 (CTR0 D7) or T16 (CTR2 D7).
TC8H
T8_OUT
Enable T8,
T8_OUT Switches
To Its Initial Value
T8_OUT Toggles
TC16H*256+TC16L
TC8H
T8_OUT Toggles
T16_OUT
TC16H*256+TC16L
T16_OUT Toggles
T16_OUT
T16_OUT Switches To Its Initial
Value When TC16 Is Enabled
Figure 33. T8_OUT and T16_OUT in Ping-Pong Mode
DS97LVO0900
PRELIMINARY
6-47