* Write the 8-byte (64bit) recognition pattern
* Read or Write the 8-byte (64bit) register data
The 8-byte (64bit) pattern/data is transferred serially, LSB first.The used bits on address and databus are: A2 data direction (0=write, 1=read) A0 data written to RTC, when A2=0=write D0 data read from RTC, when A2=1=read, and only when pattern recognized
=== Recognition Pattern ===