Response: When the ROM register parameter is disabled in the EzI2Cs user module, the address range is 0-127. In this mode, the external Master can read or write only to RAM buffers in the I2C Slave.
When the ROM register option is enabled, the address range is be 0-63. In this mode, the external Master can read constant values in ROM buffers. The 7th bit of the address is now used to differentiate between the RAM and ROM access. For example, if the address parameter is set to 10 (0x0A), the Master can access the RAM registers using address 0x0A and the ROM registers using address 0x4A.