PCA8538UG(2014) 查看數據表（PDF） - NXP Semiconductors.

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PCA8538UG
(Rev.:2014)

Automotive 102 x 9 Chip-On-Glass LCD segment driver

NXP Semiconductors. 

NXP Semiconductors

PCA8538

Automotive 102 x 9 Chip-On-Glass LCD segment driver

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Fig 41. Acknowledgement on the I2C-bus

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9.2.5 I2C-bus controller

The PCA8538 acts as an I2C-bus slave receiver. It does not initiate I2C-bus transfers. The

only data output from PCA8538 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.

Table 47. I2C slave address byte

Slave address

Bit

7

6

5

4

3

2

1

0

MSB

LSB

slave address

0

1

1

1

0

SA1 SA0 R/W

The least significant bit of the slave address byte is bit R/W (see Table 48).

Table 48.

R/W

0

1

R/W-bit description

Description

write data

read data

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 PCA8538 can be

distinguished on the same I2C-bus.

PCA8538

Product data sheet

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

Rev. 4 — 26 September 2014

© NXP Semiconductors N.V. 2014. All rights reserved.

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