UPD16670 datasheet(7/26 Pages) RENESAS

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Data Sheet S10297EJ1V0DS00

µµµµPD16670

3. PIN FUNCTIONS

Pin Symbol

Pin Name

Pad No.

I/O

Description

SEG1 to SEG60

Segment

40 to 99

Segment output pins

COM1 to COM33 Common

24 to39

100 to116

Common output pins

COM1 is assigned to common for pictograph.

SCK

Shift clock

Data shift clock

During the read-in operation, data is captured in the shift register

at the signal’s rising edge. During a read-out operation, data is

read from the shift register at the signal’s falling edge.

DATA

Data

Performs input of commands and data.

Input is performed from the MSB on the rise of the shift clock.

STB

Strobe

Communication is enabled when STB is low.

/LCDOFF

LCD off input

When at low level, a forced LCD off operation is performed

SEGn = COMn = VSS

/RESET

Reset

This pin is used for internal resets at low level.

TDATA

Test output

This is a test output pin. Leave this pin open when using the

device.

TEST

Test pin

Test mode is set when at high level.

OSCIN

15, 16

OSCOUT

Oscillator pins

5, 6

These pins are connected to a 100-k

Ω resistance. When using

an external oscillator, input to OSCIN and leave OSCOUT open.

+, C1-

+, C2-

+, C3-

Capacitor connection

pins

1 to 6

−

These are capacitor connection pins for the boost circuit.

Connect a 1-

µF capacitor.

VDD

Logic power supply pin 7

−

Power supply pins for logic

VSS

Logic ground pin

−

Ground pin for logic

VLCD

Driver power supply

pins

−

Power supply pin for driver. Output pin for internal boost circuit.

Connect a 1-

µF capacitor between this pin and the VSS pin for

boosting.

If not using the internal boost circuit, a direct driver power supply

can be input.

VLC1 - VLC5

Reference power

supply pins for driver

9 to 13

−

These are reference power supply pins for the LCD driver.

Input divided register by each external power supply pin.

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