PCF8536AT datasheet(5/54 Pages) NXP

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PCA85233

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Product data sheet

Rev. 5 — 12 November 2018

5 of 54

NXP Semiconductors

PCA85233

Automotive 80 × 4 LCD driver for low multiplex rates

Functional description

7.1 Commands of PCA85233

The command decoder identifies command bytes that arrive on the I2C-bus. The

commands available to the PCA85233 are defined in Table 5.

[1]

The possibility to disable the display allows implementation of blinking under external control.

[2]

The display is disabled by setting all backplane and segment outputs to VLCD.

[3]

Not applicable for static drive mode.

Table 5.

Definition of commands

Command

Operation code

Reference

Bit

mode-set

M[1:0]

Table 6

load-data-pointer

P[6:0]

Table 7

device-select

A[1:0]

Table 8

bank-select

Table 9

blink-select

BF[1:0]

Table 10

Table 6.

Mode-set command bit description

Bit

Symbol

Value

Description

7 to 4

1100

fixed value

display status[1]

disabled (blank)[2]

enabled

LCD bias configuration[3]

1⁄3 bias

1⁄2 bias

1 to 0

M[1:0]

LCD drive mode selection

static; 1 backplane

1:2 multiplex; 2 backplanes

1:3 multiplex; 3 backplanes

1:4 multiplex; 4 backplanes

Table 7.

Load-data-pointer command bit description

See Section 7.3.1.

Bit

Symbol

Value

Description

fixed value

6 to 0

P[6:0]

0000000 to

1001111

data pointer

7-bit binary value of 0 to 79, transferred to the data pointer to

define one of 80 display RAM addresses

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