L6360 Ver la hoja de datos (PDF) - STMicroelectronics

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L6360

IO-Link communication master transceiver IC

STMicroelectronics 

Figure 7. Transfer sequencing

L6360

Communication flow

6.7

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). The 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.

6.8

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 the L6360 address

• SA1: bit 1 of the L6360 address

• SA2: bit 2 of the L6360 address

DS8900 - Rev 7

page 15/63

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