Z86C9216VSC 查看數據表（PDF） - Zilog

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Z86C9216VSC

IR MICROCONTROLLER

Zilog 

Zilog

Z86C72/C92/L72/L92

IR Microcontroller

Counter/Timer

T8

P34

1

PAD

P34 OUT

P31

+

-

Pref1

P34 OUT

CTR0

D0

0 Normal Control

1 8-bit Timer output active

P37 OUT

P32 +

-

P33 (Pref2)

PCON

D0

0 = P34, P37 Standard Output *

1 = P34, P37 Comparator Output

* Reset condition.

P37

PAD

Figure 14. Port 3 Configuration

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).

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).

DS97LVO0900

PRELIMINARY

6-27

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