Rainbow Electronics DS17887 - Manual (Page 20)

DS17885/DS17887
20 of 38
Figure 4. DS17885/DS17887 EXTENDED REGISTER BANK DEFINITION
BANK 0 BANK 1
MSB DV0 = 0 LSB MSB DV0 = 1 LSB
00 00
0D 0D
0E 0E
3F 3F
40 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 EXTENDED
64 BYTES - USER RAM 51 EXTENDED RAM ADDR - MSB RAM
52 RESERVED 8k X 8
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 7F
TIMEKEEPING AND CONTROL
50 BYTES - USER RAM
TIMEKEEPING AND CONTROL
50 BYTES - USER RAM