Datasheet

I
2
C Interface Controller
10−7
SLLS535E − April 2008 TUSB6250
10.6 Page-Write Operation
The page-write operation is initiated in the same way as the byte-write operation, with the exception that a stop
condition is not generated after the first I
2
C EEPROM [DATA] is transmitted. The following describes the
sequence of writing 32 bytes in page mode.
Device Address + EEPROM [High Byte]
• The MCU sets I2CSCR [STOP] = 0. This forces the I
2
C interface controller not to generate a stop
condition after the contents of the I2CDOUT register are transmitted.
• The MCU writes the device address (R/W bit = 0) to the I2CADR register (write operation).
• The MCU writes the high byte of the I
2
C EEPROM address into the I2CDOUT register.
• The TXE bit in the I2CSCR register is cleared (indicating busy).
• The contents of the I2CADR register are transmitted to the I
2
C EEPROM (preceded by a start
condition on SDA).
• The contents of the I2CDOUT register are transmitted to the I
2
C EEPROM (EEPROM address).
• The TXE bit in the I2CSCR register is set and interrupts the MCU, indicating that the I2CDOUT register
contents have been transmitted.
EEPROM [Low Byte]
• The MCU writes the low byte of the I
2
C EEPROM address into the I2CDOUT register.
• The TXE bit in the I2CSCR register is cleared (indicates busy).
• The contents of the I2CDOUT register are transmitted to the I
2
C EEPROM (EEPROM address).
• The TXE bit in the I2CSCR register is set and interrupts the MCU, indicating that the I2CDOUT register
contents have been transmitted.
EEPROM [DATA] − 31 Bytes
• The data to be written to the I
2
C EEPROM is written by the MCU into the I2CDOUT register.
• The TXE bit in the I2CSCR register is cleared (indicates busy).
• The contents of the I2CDOUT register are transmitted to the I
2
C EEPROM (EEPROM data).
• The TXE bit in the I2CSCR register is set and interrupts the MCU, indicating that the I2CDOUT register
contents have been transmitted.
• This operation repeats 31 times.
EEPROM [DATA] − Last Byte
• The MCU sets I2CSCR [STOP] = 1. This forces the I
2
C interface controller to generate a stop condition
after the contents of the I2CDOUT register are transmitted.
• The MCU writes the last date byte to be written to the I
2
C EEPROM into the I2CDOUT register.
• The TXE bit in the I2CSCR register is cleared (indicates busy).
• The contents of the I2CDOUT register are transmitted to I
2
C EEPROM (EEPROM data)
• The TXE bit in the I2CSCR register is set and interrupts the MCU, indicating that the I2CDOUT register
contents have been transmitted.
• The I
2
C interface controller generates a stop condition after the contents of I2CDOUT register are
transmitted.
• End of 32-byte page-write operation