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The bit-period prescalers (I2CCLKH and I2CCLKL) are configured by the bootloader to run the I2C at a 50 percent duty cycle at 100-kHz bit rate (standard I2C mode) when the system clock is 10 MHz. These registers can be modified after receiving the first few bytes from the EEPROM. This allows the communication to be increased up to a 400-kHz bit rate (fast I2C mode) during the remaining data reads
ti 28288 control card 使用的是CAT24C16作为ethercat 的eeprom；CAT24C16 使用的是8位的byte寻址方式，而如AT24C128C 这样的eeprom芯片使用的是16位byte地址寻址方式。两者读写方式无法兼容，而且echercat对eeprom的访问是由外设控制的没有接口供外部设置。我想知道 ti 28288 control card 为什么使用CAT24C16作为ethercat eeprom？
