DS17285 Datasheet, PDF (20/38 Pages) Dallas Semiconductor – 3V/5V Real-Time Clock

DS17285/DS17287
Figure 4. DS17285/DS17287 EXTENDED REGISTER BANK DEFINITION
BANK 0
MSB
DV0 = 0
LSB
00
TIMEKEEPING AND CONTROL
0D
0E
50 BYTES - USER RAM
3F
40
64 BYTES - USER RAM
7F
BANK 1
MSB
DV0 = 1
LSB
00
TIMEKEEPING AND CONTROL
0D
0E
50 BYTES - USER RAM
3F
40
MODEL NUMBER BYTE
41
1ST BYTE SERIAL NUMBER
42
2ND BYTE SERIAL NUMBER
43
3RD BYTE SERIAL NUMBER
44
4TH BYTE SERIAL NUMBER
45
5TH BYTE SERIAL NUMBER
46
6TH BYTE SERIAL NUMBER
47
CRC BYTE
48
CENTURY BYTE
49
DATE ALARM
4A EXTENDED CONTROL REG 4A
4B EXTENDED CONTROL REG 4B
4C
RESERVED
4D
RESERVED
4E
RTC ADDRESS - 2
4F
RTC ADDRESS - 3
50
EXTENDED RAM ADDR - LSB
51
EXTENDED RAM ADDR - MSB
52
RESERVED
53
EXTENDED RAM DATA PORT
54
RESERVED
55
RESERVED
56
RESERVED
57
RESERVED
58
RESERVED
59
RESERVED
5A
RESERVED
5B
RESERVED
5C
RESERVED
5D
RESERVED
5E
RTC WRITE COUNTER
5F
RESERVED
7F
EXTENDED
RAM
2k X 8
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