Define USART Command format
CMD_EEPROM_BYTE_WRITE
CMD_EEPROM_BYTE_READ
READ / WRITE success return 0x01
READ / WRITE fail return 0x00
IO PIN Define
P0_0 - IIC_SCL
P0_1 - IIC_SDA
Circuit Diagram
AT24C64 I2C EEPROM address = 0xA6
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEifNZszU_QFlcbQ15UdR19e2aUP-bgWmniLZJW5x8PPq8-5Gd_FAOhw77T2UM3IAumFyIkX5RfNw7uuBI7gu0DeuvGYVL8GizgCwYvqs3aMYW80YeU5hc5SwbekbRCEeoRRvFhFdm4T9fRD/s1600/IIC.bmp)
CMD_EEPROM_BYTE_WRITE
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHn7ABv1LGDUbeQcXWFNpgqgGmwMCuI4WEi9iu5zMAlattjHwTK9daPbQDqd3lHtJ4tyJg-m97a9RQO4kmq5eZ5mgaUzES6QKudsMVx_mgJcxol-Rk8FJRq1g5nbEg1HV5Gy3rlLxChtBj/s1600/cmd_w.bmp)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4spwZOSo4EbbTegKUUUIhQAQfH9jamCxeF3XFpnwkKbzd_l6Eyv2W-8iMSZFc5LubVnNZEZ_JjBUUvwnfc6ySqB0JvGWRoCv2WQlpJoTN-6XCbZUU8vGJV05kBdBhLzBW6ltrs3x_d0H8/s1600/cmd_r.bmp)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjOI1-8GwFPmGD_rnchreVFclCsch0fGbYEos1gAvAsUspuWzAut7lEXMw33JxU8YjL8b5iYbu9sDESn-dA2gkg7r7mEQ85eFJIq8siHXLLamRS3Lw-nNmNzUlZDr3zoPdrkshkWTbGwn55/s1600/cmd_W2.bmp)
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