STMPE2403 datasheet(15/63 Pages) STMICROELECTRONICS

Part #	STMPE2403

Description	24-bit Enhanced port expander with Keypad and PWM controller Xpander logic

PDF	63 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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15 / 63 page

STMPE2403

I2C Interface

15/63

6.5

Slave device address

The slave device address is a 7 or 10-bit address, where the least significant 2-bit are

programmable. These 2-bit values will be loaded in once upon reset and after that these 2

pins no longer be needed with the exception during General Call. Up to 4 STMPE2403

devices can be connected on a single I2C bus.

6.6

Memory addressing

For the bus master to communicate to the slave device, the bus master must initiate a Start

condition and followed by the slave device address. Accompanying the slave device

address, there is a Read/Write bit (R/W). The bit is set to 1 for Read and 0 for Write

operation.

If a match occurs on the slave device address, the corresponding device gives an

acknowledgement on the SDA during the 9th bit time. If there is no match, it deselects itself

from the bus by not responding to the transaction.

Table 13. Slave device address

ADDR 1

ADDR 0

Address

0x84

0x86

0x88

0x8A

STMPE2403 Datasheet(PDF) 15 Page - STMicroelectronics