PCF8536AT datasheet(30/54 Pages) NXP

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PCA8576F

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Product data sheet

Rev. 3 — 3 December 2014

30 of 54

NXP Semiconductors

PCA8576F

Automotive 40 × 4 LCD driver

After an acknowledgement, one or more command bytes follow, that define the status of

each addressed PCA8576F.

The last command byte sent is identified by resetting its most significant bit, continuation

bit C, (see Section 7.1). The command bytes are also acknowledged by all addressed

PCA8576F on the bus.

After the last command byte, one or more display data bytes may follow. Display data

bytes are stored in the display RAM at the address specified by the data pointer and the

subaddress counter. Both data pointer and subaddress counter are automatically updated

and the data directed to the intended PCA8576F device.

An acknowledgement after each byte is asserted only by the PCA8576Fs that are

addressed via address lines A0 and A1. After the last display byte, the I2C-bus master

asserts a STOP condition (P). Alternately a START may be asserted to restart an I2C-bus

access.

Fig 24. I2C-bus protocol

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