Z87100 Просмотр технического описания (PDF) - Zilog

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Z87100

PN MODULATOR WIRELESS TRANSMITTER

Zilog 

Zilog

Z87100

Wireless Transmitter

Port 3 (P36-P31). Port 3 is a 4-bit, CMOS-compatible port. ing, or both edge triggered interrupts (IRQ register bits 6

These four lines consist of two fixed inputs (P31, P33) and and 7). Access to Counter/Timer 1 is made through P31

two fixed outputs (P36-P35). P31 and P33 are standard (TIN) and P36 (TOUT).

CMOS inputs (no auto latch) and P35 and P36 are push-

3

pull outputs. An on-board comparator can process analog When the PN modulator is enabled, P35 is automatically

signals on P31 with reference to the voltage on P33, where configured as the output for the PN spread data, and, if de-

this analog function is enabled by programming Port 3 sired, P36 may be programmed as the PN clock output

Mode Register (bit 1). P31 is programmable as falling, ris- (Figures 7 and 8).

P36

P35

Z87100

P33

P31

Port 3

Port 3

(I/O or Control)

R247 = P3M

1 = Analog

D1

0 = Digital

P31 (AN1)

+

P33 (REF)

-

DIG.

AN.

IRQ2, TIN, P31 Data Latch

Stop Mode Recovery Source

IRQ1, P33 Data Latch

Figure 7. Port 3 Configuration (P31, P33)

DS96WRL0700

PRELIMINARY

3-11

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