L6360 datasheet(21/65 Pages) STMICROELECTRONICS

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L6360

Device configuration

Doc ID 022817 Rev 2

21/65

6.1.7

Communication flow

The communication is managed by the microcontroller that generates the clock signal.

A serial data transfer always begins with a START condition and ends with a STOP

condition.

Data is transferred as 8-bit bytes, MSB first.

The first byte following the START condition contains the address (7 bits). A 9th clock pulse

follows the 8th clock cycle of a byte transfer, during which the receiver must send an

acknowledge bit to the transmitter.

Figure 8.

I2C communication

Each byte is followed by an acknowledgment bit as indicated by the A or A blocks in the

sequence. A START condition immediately followed by a STOP condition (void message) is

a prohibited format.

6.1.8

I2C address

Each I2C connected to the bus is addressable by a unique address.

The I2C address is 7 bits long, and there is a simple master/slave relationship.

The LSB of the L6360 address can be programmed by means of dedicated IC pins (SA0,

SA1 and SA2, which can be hard wired to VDD or GND, or handled by µC outputs): the

microcontroller can interface up to 8 L6360 ICs.

The I2C inside the device has 5 pins:

●

SDA: data

●

SCL: clock

●

SA0: LSB of L6360 address

●

SA1: bit 1 of L6360 address

●

SA2: bit 2 of L6360 address

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