z86c9216vsc ZiLOG Semiconductor, z86c9216vsc Datasheet - Page 27

• Manufacturer Part Number: z86c9216vsc
• Description: Ir Microcontroller
• Manufacturer: ZiLOG Semiconductor

Zilog
Comparator Inputs. In Analog Mode, Port 3 (P31 and
P32) have a comparator front end. The comparator refer-
ence is supplied to P33 and Pref1. In this mode, the P33
internal data latch and its corresponding IRQ1 is diverted
to the SMR Sources (excluding P31, P32, and P33) as
shown in Figure 38. In digital mode, P33 is used as D3 of
the Port 3 input register which then generates IRQ1 as
shown in Figure 15.
When P31 is used as a counter timer input (demodulation
mode), Timer input is always taken from the P31 digital in-
put buffer (whether or not analog mode is enabled).
DS97LVO0900
P31
P32
Pref1
P33 (Pref2)
P34 OUT
P37 OUT
+
-
+
PCON
-
D0
Figure 14. Port 3 Configuration
P34 OUT
T8
*
0 = P34, P37 Standard Output
1 = P34, P37 Comparator Output
Reset condition.
P R E L I M I N A R Y
Counter/Timer
Notes: Comparators are powered down by entering STOP
mode. For P31-P33 to be used as a Stop-Mode Recovery
source, these inputs must be placed into digital mode.
Comparator Outputs. These may be programmed to be
output on P34 and P37 through the PCON register (Figure
15).
CTR0
D0
*
0 Normal Control
1 8-bit Timer output active
P37
P34
Z86C72/C92/L72/L92
PAD
IR Microcontroller
PAD
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