2–26

2.11.5 Page Write Operation

Page write operation is initiated the same way as byte write, with the exception that stop condition is not generated

after the first EEPROM [DATA] is transmitted. The following describes the sequence of writing 32-bytes in page mode:

Device Address + EEPROM [High-byte]

•

MCU sets I2CSTA[SWR] = 0. This forces the I2C controller to not generate a stop condition after the content

of I2CDAO register is transmitted.

•

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

•

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

•

TXE bit in I2CSTA is cleared, indicating busy

•

The content of I2CADR register is transmitted to the device (preceded by start condition on SDA)

•

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

•

TXE bit in I2CSTA is set, and interrupt the MCU, indicating that I2CDAO register has been sent.

EEPROM [Low-byte]

•

MCU writes the low-byte of the EEPROM address into I2CDAO register

•

TXE bit in I2CSTA is cleared, indicating busy

•

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

•

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

31 Bytes EEPROM [DATA]

•

MCU writes the DATA to be written to the EEPROM into I2CDAO register

•

TXE bit in I2CSTA is cleared, indicating busy

•

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

•

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

•

This operation repeats 31 times.

Last Byte EEPROM [DATA]

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

of I2CDAO register is transmitted.

•

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

•

TXE bit in I2CSTA is cleared, indicating busy

•

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

•

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

•

I2C controller generates a stop condition after the content of I2CDAO register is transmitted

•

END of 32-byte page write operation