PCF8536AT datasheet(8/53 Pages) NXP

8 / 53 page

NXP Semiconductors

PCA8551

Automotive 36 × 4 LCD segment driver

Figure 5) and all following data are written into these register addresses. After register

18h, the auto-incrementing will stop and subsequent data are ignored.

aaa-011661

address counter

00h

auto-increment

01h

02h

03h

...

15h

16h

17h

Figure 5. Address counter incrementing

7.2 Command registers of the PCA8551

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.

PCA8551

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Product data sheet

Rev. 3.1 — 3 May 2021

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