Max6902 spi-compatible rtc in a tdfn, Table 2. register address and description – Rainbow Electronics MAX6902 User Manual
Page 7
MAX6902
SPI-Compatible RTC in a TDFN
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7
REGISTER ADDRESS
REGISTER DEFINITION
FUNCTION
A7 A6 A5 A4 A3 A2 A1 A0
VALUE
D7
D6 D5 D4
D3
D2 D1
D0
RAM
RAM 0
RD
1
0
0
0
0
0
1
RAM DATA 0
x
x
x
x
x
x
x
x
/W
•
•
•
•
•
•
•
•
•
•
•
•
RAM 30
RD
1
1
1
1
1
0
1
RAM DATA 30
x
x
x
x
x
x
x
x
/W
RAM BURST
RD
1
1
1
1
1
1
1
/W
Note: *POR STATE defines power-on reset state of register contents.
Figure 2. Register Address Definition (Sheet 3 of 3)
Table 2. Register Address and Description
WRITE (HEX)
READ (HEX)
DESCRIPTION
POR CONTENTS (HEX)
01
81
Seconds
00
03
83
Minutes
00
05
85
Hours
00
07
87
Date
01
09
89
Month
01
0B
8B
Day
01
0D
8D
Year
70
0F
8F
Control
00
13
93
Century
19
15
95
Alarm Configuration
00
17
97
Reserved
07
19
99
Seconds Alarm Threshold
7F
1B
9B
Minutes Alarm Threshold
7F
1D
9D
Hours Alarm Threshold
BF
1F
9F
Date Alarm Threshold
3F
21
A1
Month Alarm Threshold
1F
23
A3
Day Alarm Threshold
07
25
A5
Year Alarm Threshold
FF
3F
BF
Clock Burst
Not applicable