DS3234 writeToSRAM

In SparkFunDS3234RTC.cpp i have seen this function :

void DS3234::writeToSRAM(uint8_t address, uint8_t data){

spiWriteByte(DS3234_REGISTER_SRAMA, address);

spiWriteByte(DS3234_REGISTER_SRAMD, data);

}

Unfortunately I don’t found in the DS3234_RTC_Demo.ino

an example how I have use this function.

I don’t know which address or data I must enter.

rtc.writeToSRAM ( ???, rtc.hour?);

Thanks for your any help.

Willy