PCF8532 datasheet(22/44 Pages) NXP

tên linh kiện	PCF8532

Giải thích chi tiết về linh kiện	Universal LCD driver for low multiplex rates

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PCF8532_1

Product data sheet

Rev. 1 — 10 February 2009

22 of 44

NXP Semiconductors

PCF8532

Universal LCD driver for low multiplex rates

7.17 Command decoder

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

commands available to the PCF8532 are deﬁned in Table 8.

Fig 15. I2C-bus protocol

EXAMPLES

a) transmit two bytes of RAM data

mgl752

S 0 1110

control byte

slave address

RAM/command byte

RAM DATA

R/W = 0

S 0 1110

0 1

RAM DATA

b) transmit two command bytes

COMMAND

S 0 1110

1 0

COMMAND

c) transmit one command byte and two RAM date bytes

COMMAND

S 0 1110

1 0

RAM DATA

Fig 16. Format of control byte

Table 7.

Load-data-pointer command bit description

Bit

Symbol

Value

Description

7CO

continue bit

last control byte

control bytes continue

6RS

command register

data register

5 to 0

not relevant

mgl753

not relevant

210

MSB

LSB

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