PCF8545ATT datasheet(7/50 Pages) NXP

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NXP Semiconductors

PCA8561

Automotive 18 × 4 LCD segment driver

aaa-012345

address counter

00h

auto-increment

01h

02h

03h

...

0Dh

0Eh

0Fh

Figure 5. Address counter incrementing

7.2 Command registers of the PCA8561

7.2.1 Command: Device_ctrl

The Device_ctrl command sets the device into a defined state. It should be executed

before enabling the display (see bit DE in Table 6).

Bit

Symbol

Value

Description

7 to 5

000

default value

frame frequency selection

000

ffr = 32 Hz

001[1]

ffr = 64 Hz

010

ffr = 96 Hz

011

ffr = 128 Hz

100

ffr = 160 Hz

101

ffr = 192 Hz

110

ffr = 224 Hz

4 to 2

FF[2:0]

111

ffr = 256 Hz

internal oscillator control

0[1]

enabled

OSC

disabled

clock output enable

0[1]

clock signal not available on pin CLK; pin CLK is

in 3-state

COE

clock signal available on pin CLK

Table 5. Device_ctrl - device control command register (address 01h) bit

description

[1]

Default value.

7.2.1.1 Internal oscillator and clock output

Bit OSC enables or disables the internal oscillator. When the internal oscillator is used,

bit COE allows making the clock signal available on pin CLK. If this is not intended, pin

PCA8561

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Product data sheet

Rev. 5 — 15 March 2021

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