This application note describes how to perform block erase, block write, and block read of a single page (32 bytes) of the ADM106x EEPROM space. For the sake of explanation in this article, it is assumed that the EEPROM range to be erased, written, and read is 0xF8; 0x00 to 0xF8; 0x1F.
0xF8; 0x00 to 0xF8; 0x1F Block erase of EEPROM space
To perform a block erase of the EEPROM space, follow the steps below.
1. Write 0x05 to Register 0x90 to enable EEPROM block erase.
2. Perform all SMBus operations listed below.
• Send slave address WRITE
• Receive reply message
• Send EEPROM high address (0xF8)
• Receive reply message
• Send EEPROM low address (0x00)
• Receive reply message
• Send STOP
• Send slave address WRITE
• Receive reply message
• Send Page Erase command code (0xFE)
• Receive reply message
• Send STOP
3. Repeat the procedure in step 2 for each EEPROM page to be erased. However, the lower address (Send EEPROM Lower Address) should be incremented by 32 bytes, for example: 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, and 0xE0.
4. Write 0x01 to Register 0x90 to disable EEPROM block erase.
0xF8; 0x00 to 0xF8; 0x1F Block write of EEPROM space
To perform a block write to the EEPROM space, perform the following steps.
1. Perform all the actions listed below.
• Send slave address WRITE
• Receive reply message
• Send EEPROM high address (0xF8)
• Receive reply message
• Send EEPROM low address (0x00)
• Receive reply message
• Send STOP
• Send slave address WRITE
• Receive reply message
• Send a block write command (0xFC)
• Receive reply message
• Send the number of bytes to write (0x20)
• Receive reply message
• Send 32 bytes of data
• Receive an Acknowledge message from the slave after each byte is sent
• Send STOP
2. Repeat the procedure in step 1 for each EEPROM page to be written. However, the lower address (Send EEPROM Lower Address) should be incremented by 32 bytes, for example: 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, and 0xE0.
0xF8; 0x00 to 0xF8; 0x1F Block read of EEPROM space
To perform a block read of the EEPROM space, follow these steps.
1. Write 0x01 to Register 0x90 to enable continuous update of the configuration registers.
2. Perform all the actions listed below.
• Send slave address WRITE
• Receive reply message
• Send EEPROM high address (0xF8)
• Receive reply message
• Send EEPROM low address (0x00)
• Receive reply message
• Send STOP
• Send slave address WRITE
• Receive reply message
• Send a block read command (0xFD)
• Receive reply message
• Send slave address READ
• Receive reply message
• Receive the number of data bytes to read (0x20)
• Send host reply message
• Receive 32 bytes of data
• Send a host acknowledgement message after each byte received
• Send STOP
3. Repeat the procedure in step 2 for each EEPROM page to be read. However, the lower address (Send EEPROM Lower Address) should be incremented by 32 bytes, for example: 0x20, 0x40, 0x60, 0x80, 0xA0, 0xC0, and 0xE0.
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