Datasheet

DS17285/DS17287/DS17485/DS17487/DS17885/DS17887
Real-Time Clocks
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Table 5. Extended Bank Register Bank Definition
Note: Reserved bits can be written to any value, but always read back as zeros.
Bank 0 Bank 1
DV0 = 0 DV0 = 1
00h
0Dh
Timekeeping and Control
00h
0Dh
Timekeeping and Control
0Eh
3Fh
50 Bytes – User RAM
0Eh
3Fh
50 Bytes – User RAM
40h 40h Model Number Byte
41h 1st Byte Serial Number
42h 2nd Byte Serial Number
43h 3rd Byte Serial Number
44h 4th Byte Serial Number
45h 5th Byte Serial Number
46h 6th Byte Serial Number
47h CRC Byte
48h Century Byte
49h Date Alarm
4Ah Extended Control Register 4A
4Bh Extended Control Register 4B
4Ch Reserved
4Dh Reserved
4Eh RTC Address – 2
4Fh RTC Address – 3
64 Bytes – User RAM 50h Extended RAM Address LSB
51h Extended RAM Address MSB
52h Reserved
53h Extended RAM Data Port
54h Reserved
55h Reserved
56h Reserved
57h Reserved
58h Reserved
59h Reserved
5Ah Reserved
5Bh Reserved
5Ch Reserved
5Dh Reserved
5Eh RTC Write Counter
7Fh
5Fh
7Fh
Reserved