UPD17933 datasheet(13/252 Pages) NEC

13 / 252 page

µPD17933, 17934

Pin No.

Symbol

Function

Output Form

COM0

These pins output the common signals of the LCD controller/driver.

CMOS

At reset

On clock stop

3-state

COM3

Reset by RESET pin

WDT&SP reset

Output low level

LCD0

These pins are the segment signal output pins of the LCD controller/driver.

CMOS

push-pull

LCD16

P2A0/LCD17

Port 2A input port, the segment signal output pins of the LCD controller/driver.

–

P2A1/LCD18

• P2A0 through P2A2

P2A2/LCD19

3-bit input port

• LCD17 through LCD19

LCD segment output

At reset

On clock stop

Reset by RESET pin

WDT&SP reset

Input (P2A2-P2A0)

Retained

P0C0

4-bit output

CMOS

At reset

On clock stop

push-pull

P0C3

Reset by RESET pin

WDT&SP reset

Output low level

Retained

INT

Edge-detected vector interrupt input.

–

Rising or falling edge is selectable.

XOUT

Crystal resonator connection pin.

–

XIN

P2C0

These pins form a 4-bit I/O port which can be set in the input or output mode

CMOS

in 1-bit units.

push-pull

P2C3

At reset

On clock stop

Reset by RESET pin

WDT&SP reset

Input

Retained

P0D0

Port 0D input port, A/D converter input pins and to release the HALT

–

P0D1/AD0

and STOP modes.

P0D2/AD1

• P0D0 through P0D3

P0D3/AD2

4-bit input port

• AD0 through AD2

Analog input of A/D converter

• HALT and STOP mode releasing

Releases HALT or STOP mode when a high level is input.

At reset

On clock stop

Reset by RESET pin

WDT&SP reset

Input with pull-down resistor

Retained

(P0D3-P0D0)

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