L6360 datasheet(42/65 Pages) STMICROELECTRONICS

42 / 65 page

Device configuration

L6360

42/65

Doc ID 022817 Rev 2

Microcontroller I2C establishes the communication: START condition

Microcontroller I2C sends the slave address on the I2C bus to check if the slave is

online (1st frame)

After the address is matched, the microcontroller starts the data transmission:

the 2nd frame is the data to be written into the selected register (see 3rd frame)

The 3rd frame is composed of the address of the register to be written and of the parity

of the 2nd frame.

Microcontroller I2C finishes the communication: STOP condition

The L6360 calculates the parity of the data received

The L6360 compares its parity calculation with the parity bits in the 3rd frame (sent by

the microcontroller)

If the parities match, the protocol flow goes on (exit), otherwise the PE bit inside the

L6360 status register is set and the flow goes to the next state.

The L6360 generates an interrupt to report the parity check error.

10. The microcontroller sends a read request to the device. The L6360 then sends the

status and parity registers. The microcontroller can resend the corrupted data register.

11. Back to step 1.

The I2C frame (configuration, control, diagnostic phases) must provide:

●

Slave address (7 bits)

●

Transmission direction (read/write)

●

Data (8 bits: data register)

●

Parity bits (P2, P1, P0)

●

Registers address (4 bits: 16 registers addressable)

The three frames are shown in Figure 26 and below:

Figure 26.

Current Write mode frames

L6360 Datenblatt(PDF) 42 Page - STMicroelectronics