PCA85232DA datasheet(26/54 Pages) NXP

26 / 54 page

PCA85232

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 1 — 8 December 2010

26 of 54

NXP Semiconductors

PCA85232

LCD driver for low multiplex rates

The acknowledgement after each byte is made only by the (A0 and A1) addressed

PCA85232. After the last (display) byte, the I2C-bus master issues a STOP condition (P).

Alternatively a START may be asserted to RESTART an I2C-bus access.

7.17 Command decoder

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

commands available to the PCA85232 are defined in Table 9.

[1]

Power-on and reset value.

[2]

The possibility to disable the display allows implementation of blinking under external control; the enable bit

determines also whether the internal clock signal is available at the CLK pin (see Section 7.5.1).

[3]

Not applicable for static drive mode.

[1]

Power-on and reset value.

Table 9.

Definition of PCA85232 commands

Command

Operation code

Reference

Bit

mode-set

M[1:0]

Table 10

load-data-pointer-MSB

P[7:4]

Table 11

load-data-pointer-LSB

P[3:0]

Table 12

device-select

A[1:0]

Table 13

bank-select

Table 14

blink-select

BF[1:0]

Table 15

frequency-prescaler

F[2:0]

Table 16

Table 10.

Mode-set command bit description

Bit

Symbol

Value

Description

7 to 4

1100

fixed value

display status

0[1]

disabled (blank)[2]

enabled

LCD bias configuration[3]

0[1]

⁄

3 bias

⁄

2 bias

1 to 0

M[1:0]

LCD drive mode selection

static; BP0

1:2 multiplex; BP0, BP1

1:3 multiplex; BP0, BP1, BP2

00[1]

1:4 multiplex; BP0, BP1, BP2, BP3

Table 11.

Load-data-pointer-MSB command bit description

Bit

Symbol

Value

Description

7 to 4

0000

fixed value

3 to 0

P[7:4]

0000[1] to

1001

P7 to P4 defines the first 4 (most significant) bits of

the data pointer that indicates one of the 160 display

RAM addresses

PCA85232DA Datasheet(PDF) 26 Page - NXP Semiconductors

PCA85232DA Datasheet(HTML) 26 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

Datasheet Download

Link URL