PCF8536AT datasheet(59/103 Pages) NXP

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PCA8530

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Product data sheet

Rev. 2 — 25 September 2014

59 of 103

NXP Semiconductors

PCA8530

Automotive 102 x 4 Chip-On-Glass LCD segment driver

9.2.5 I2C-bus controller

The PCA8530 acts as an I2C-bus slave receiver. It does not initiate I2C-bus transfers. The

only data output from PCA8530 is the acknowledge signals and the temperature readout

byte of the selected device.

9.2.6 Input filters

To enhance noise immunity in electrically adverse environments, RC low-pass filters are

provided on the SDA and SCL lines.

9.2.7 I2C-bus slave address

Device selection depends on the I2C-bus slave address.

The least significant bit of the slave address byte is bit R/W (see Table 44).

Bit 1 and bit 2 of the slave address are defined by connecting the inputs SA0 and SA1 to

either VSS1 (logic 0) or VDD1 (logic 1). Therefore, four instances of PCA8530 can be

distinguished on the same I2C-bus.

Fig 36. Acknowledgement on the I2C-bus

Table 43.

I2C slave address byte

Slave address

Bit

MSB

LSB

slave address

SA1

SA0

R/W

Table 44.

R/W-bit description

R/W

Description

write data

read data

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