Max6902 spi-compatible rtc in a tdfn – Rainbow Electronics MAX6902 User Manual
Page 5
MAX6902
SPI-Compatible RTC in a TDFN
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5
Figure 2. Register Address Definition (Sheet 1 of 3)
REGISTER ADDRESS
REGISTER DEFINITION
FUNCTION
A7 A6 A5 A4 A3 A2 A1 A0
VALUE
D7
D6 D5 D4
D3
D2 D1
D0
CLOCK
SECONDS
RD
0
0
0
0
0
0
1
00-59
0
10 SEC
1 SEC
/W
*POR STATE
0
0
0
0
0
0
0
0
MINUTES
RD
0
0
0
0
0
1
1
00-59
ALM
OUT
10 MIN
1 MIN
/W
*POR STATE
0
0
0
0
0
0
0
0
HOURS
RD
0
0
0
0
1
0
1
00-23
12/24
10
HR
/W
01-12
1/0
0
A/P
0/1
10
HR
1 HR
*POR STATE
0
0
0
0
0
0
0
0
DATE
RD
0
0
0
0
1
1
1
01-28/29
01-30
0-31
0
0
10 DATE
1 DATE
/W
*POR STATE
0
0
0
0
0
0
0
1
MONTH
RD
0
0
0
1
0
0
1
01-12
0
0
0 10M
1 MONTH
/W
*POR STATE
0
0
0
0
0
0
0
1
DAY
RD
0
0
0
1
0
1
1
01-07
0
0
0
0
0
WEEK DAY
/W
*POR STATE
0
0
0
0
0
0
0
1
YEAR
RD
0
0
0
1
1
0
1
00-99
10 YEAR
1 YEAR
/W
*POR STATE
0
1
1
1
0
0
0
0
CONTROL
RD
0
0
0
1
1
1
1
WP
0
0
0
0
0
0
0
/W
*POR STATE
0
0
0
0
0
0
0
0
CENTURY
RD
0
0
1
0
0
1
1
00-99
1000 YEAR
100 YEAR
/W
*POR STATE
0
0
0
1
1
0
0
1
Note: *POR STATE d efi nes p ow er - on r eset state of r eg i ster contents.