PCA9620 datasheet(4/71 Pages) NXP

4 / 71 page

PCA9620

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Product data sheet

Rev. 1 — 9 December 2010

4 of 71

NXP Semiconductors

PCA9620

Universal LCD driver for low multiplex rates

6.2 Pin description

[1]

When the internal VLCD generation is used, this pin drives the VLCD voltage. In this case pin VLCD

is an output. When the external supply is requested then pin VLCD is an input and VLCD can be

supplied to it. In this case the internal charge pump must be disabled (see Table 8 on page 7).

Table 3.

Pin description

Symbol

Type

Description

S0 to S59

61 to 80 and

1 to 40

output

LCD segment

BP0 to BP7

41 to 48

output

LCD backplane

VLCD

supply/output[1]

LCD supply voltage

VDD2

supply

supply voltage 2 (charge pump)

VDD1

supply

supply voltage 1 (analog and digital)

VSS

supply

ground supply voltage

T1 to T3

53 to 55

input

test pins; must be tied to VSS in applications

CLK

input/output

internal oscillator output, external oscillator input

A0, A1

57, 58

input

I2C-bus slave address selection bit

SCL

input

I2C-bus serial clock

SDA

input/output

I2C-bus serial data

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