TUSB3210 datasheet(38/45 Pages) TI

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TUSB3210

Universal Serial Bus

General-Purpose Device Controller

SLLS466F – FEBRUARY 2001 – REVISED AUGUST 2007

Device Address + EEPROM [High Byte]

1. The MCU sets I2CSTA[SWR] = 0. This prevents the I2C controller from generating a stop condition

after the content of the I2CDAO register is transmitted.

2. The MCU writes the device address (R/W bit = 0) to the I2CADR register (write operation).

3. The MCU writes the high byte of the EEPROM address into the I2CDAO register.

4. The TXE bit in I2CSTA is cleared, indicating busy.

5. The content of the I2CADR register is transmitted to the device (preceded by a start condition on

SDA).

6. The content of the I2CDAO register is transmitted to the device (EEPROM address).

7. The TXE bit in I2CSTA is set and interrupts the MCU, indicating that the I2CDAO register has been

sent.

EEPROM [Low Byte]

1. The MCU writes the low byte of the EEPROM address into the I2CDAO register.

2. The TXE bit in I2CSTA is cleared, indicating busy.

3. The content of the I2CDAO register is transmitted to the device (EEPROM address).

4. The TXE bit in I2CSTA is set and interrupts the MCU, indicating that the I2CDAO register has been

sent.

31 Bytes EEPROM [DATA]

1. The MCU writes the DATA to be written to the EEPROM into the I2CDAO register.

2. The TXE bit in I2CSTA is cleared, indicating busy.

3. The content of the I2CDAO register is transmitted to the device (EEPROM data).

4. The TXE bit in I2CSTA is set and interrupts the MCU, indicating that the I2CDAO register has been

sent.

5. This operation repeats 31 times.

Last Byte EEPROM [DATA]

1. The MCU sets I2CSTA[SWR] = 1. This forces the I2C controller to generate a stop condition after the

content of the I2CDAO register is transmitted.

2. The MCU writes the last DATA byte to be written to the EEPROM into the I2CDAO register.

3. The TXE bit in I2CSTA is cleared, indicating busy.

4. The content of the I2CDAO register is transmitted to the EEPROM (EEPROM data).

5. The TXE bit in I2CSTA is set and interrupts the MCU, indicating that the I2CDAO register has been

sent.

6. The I2C controller generates a stop condition after the content of the I2CDAO register is transmitted,

terminating the 32-byte page write operation.

Functional Description

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