STMPE1601 datasheet(12/58 Pages) STMICROELECTRONICS

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I2C interface

STMPE1601

12/58

I2C interface

The features that are supported by the I2C interface are listed below:

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I2C slave device

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Operates at 1.8 V

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Compliant to Philips I2C specification version 2.1

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Supports standard (up to 100kbps) and fast (up to 400 kbps) modes

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7-bit and 10-bit device addressing modes

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General Call

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Start/Restart/Stop

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Address up to 8 STMPE1601 devices via the I2C interface

The address is selected by the state of 3 pins. The state of the pins is read upon reset and

then the pins can be configured for normal operation. The pins have a pull-up or down to set

the address. The I2C interface module allows the connected host system to access the

registers in the STMPE1601.

6.1

Start condition

A Start condition is identified by a falling edge of SDATA while SCLK is stable at high state.

A Start condition must precede any data/command transfer. The device continuously

monitors for a Start condition and does not respond to any transaction unless one is

encountered.

6.2

Stop condition

A Stop condition is identified by a rising edge of SDATA while SCLK is stable at high state.

A Stop condition terminates the communication between the slave device and bus master. A

read command that is followed by NoAck can be followed by a Stop condition to force the

slave device into idle mode. When the slave device is in idle mode, it is ready to receive the

next I2C transaction. A Stop condition at the end of a write command stops the write

operation to the registers.

Table 12.

I2C addresses

Address

000

40h

001

41h

010

42h

011

43h

100

44h

101

45h

110

46h

111

47h

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