DAC53701 datasheet(32/59 Pages) TI

32 / 59 page

8.5.2.1 Address Byte

The address byte, as shown in the following table, is the first byte received following the start condition from the

master device. The first five bits (MSBs) of the address are factory preset to 10010. The next two bits of the

address are controlled by the SLAVE_ADDRESS field in the CONFIG2 register. Follow the procedure described

in the next section to configure the slave address. The possible slave addresses using these bits are also shown

in the next section.

Table 8-12. Address Byte

COMMENT

MSB

LSB

—

AD6

AD5

AD4

AD3

AD2

AD1

AD0

R/ W

General address

See Table 8-13

(slave address column)

0 or 1

Broadcast address

The DACx3701 family supports broadcast addressing, which can be used for synchronously updating or

powering down multiple DACx3701 devices. The DACx3701 family is designed to work with other members of

the family to support multichip synchronous updates. Using the broadcast address, the DACx3701 devices

respond regardless of the states of the SLAVE_ADDRESS bits. Broadcast is supported only in write mode.

8.5.2.1.1 Slave Address Configuration

This section provides the step by step procedure to configure the I2C slave addresses for up to four DACs. Use

the broadcast address for all the steps.

1. Set GPI pin to 0b for all devices.

2. Set GPI_CONFIG in the CONFIG2 register to 111b.

3. Set GPI_EN in the TRIGGER register to 1b.

4. Set the GPI pin to logic HIGH for the device that needs to be configured.

5. Write data to SLAVE_ADDRESS bit field in the CONFIG2 register. Only the device with GPI pin logic HIGH

updates the SLAVE_ADDRESS setting passed in the command. Make sure that the rest of the devices on

the same I2C bus have their respective GPI pins set to logic LOW during this process.

6. Toggle the GPI pin of the device bring programmed to logic LOW.

7. Repeat steps (1) through (6) above to program the I2C slave addresses to all the devices on the bus.

8. Set GPI_EN to 0b.

9. Change GPI_CONFIG to 000b.

10.Trigger NVM write operation.

The devices are now ready for use.

Table 8-13. Address Format

SLAVE ADDRESS

SLAVE_ADDRESS FIELD

IN CONFIG2 REGISTER

1001000

00 (default)

1001001

1001010

1001011

DAC53701, DAC43701

SLASEY5 – DECEMBER 2020

www.ti.com

Submit Document Feedback

Product Folder Links: DAC53701 DAC43701

DAC53701 Datasheet(PDF) 32 Page - Texas Instruments

DAC53701 Datasheet(HTML) 32 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

Datasheet Download

Link URL