UPD78044F datasheet(42/472 Pages) NEC

42 / 472 page

Chapter 2

Pin Function (µPD780828A Subseries)

User’s Manual U16504EE1V1UD00

2.3.8 P80 to P87 (Port 8)

These are 8-bit input/output ports. Besides serving as input/output ports, they function as segment

signal output pins of the LCD controller/driver.

The following operating modes can be specified bit-wise or byte-wise.

(1)

Port mode

These ports function as 8-bit input/output ports. They can be specified bit-wise as input or output

ports with port mode register 8.

(2)

Control mode

These ports function as segment output signal pins (S8 to S15) of the LCD controller/driver.

2.3.9 P90 to P97 (Port 9)

These are 8-bit input/output ports. Besides serving as input/output ports, they function as segment sig-

nal output pins of the LCD controller/driver, timer input/output and as input/output of the serial interface.

The following operating modes can be specified bit-wise or byte-wise.

(1)

Port mode

These ports function as 8-bit input/output ports. They can be specified bit-wise as input or output

ports with port mode register 9.

(2)

Control mode

These ports function as timer input/output, timer capture input, as timer output and as LCD seg-

ment output.

(a) TI22

Pin for external capture trigger input to the 16-bit timer capture register of TM2.

(b) TPO

Pin for output of the 16-bit timer (TM2).

Pin for external count clock input to 8-bit timer/event counter.

(d) TO51

Pin for output of the 8-bit timer/event counter.

(e) S16 to S23

Pins for segment output signals of the LCD controller/driver.

(f) SCK31

Serial interface serial clock input/output pin.

(g) SI31, SO31, SIO31

Serial interface serial data input/output pins.

UPD78044F Datasheet(PDF) 42 Page - NEC