Changes
/* Dallas Semiconductors Smart Watch */
* [[Media:DS1315-phantom-time-chip.pdf]] - Dallas Datasheet for '''16pin Phantom Time Chip'''
* [[Media:DS1216-app-note-52.pdf]] - Dallas Application Note on Smart Watch and Phantom Time Chip
=== 64bit packets ===
Accessing the RTC is done by following steps
* Read 1 or more bits (this resets the recognition pattern; best read at least 64 bits, in case the chip was in the 64-bit data read phase)
* 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.
=== Recognition Pattern ===
The recognition pattern is: C5h,3Ah,A3h,5Ch,C5h,3Ah,A3h,5Ch.
=== Register 0..7 ===
0 1/100 Seconds (BCD 00h..99h)
1 Seconds (BCD 00h..59h) (Bit7=Zero)
2 Minutes (BCD 00h..59h) (Bit7=Zero)
3 Hours (BCD 01h..12h or 00h..23h) (Bit5=PM when Bit7=12-hour mode) (Bit6=Zero)
4 Day of Week (01h..07h) (Bit4=Disable Reset input, Bit5=Disable OSC, stop clock) (Bit3,6,7=Zero)
5 Day (BCD 01h..31h) (Bit6-7=Zero)
6 Month (BCD 01h..12h) (Bit5-7=Zero)
7 Year (BCD 00h..99h)
== Pictures ==
