Max6900 i, C-compatible rtc in a tdfn – Rainbow Electronics MAX6900 User Manual
Page 9
MAX6900
I
2
C-Compatible RTC in a TDFN
_______________________________________________________________________________________
9
FUNCTION
A7 A6 A5 A4 A3 A2 A1 A0
VALUE
D7
D6
D5
D4
D3
D2 D1
D0
CLOCK
RAM
RAM 0
1
1
0
0
0
0
0
RD
RAM DATA 0
x
x
x
x
x
x
x
x
/W
RAM 30
1
1
1
1
1
1
0
RD
RAM DATA 30
x
x
x
x
x
x
x
x
/W
RAM BURST
1
1
1
1
1
1
1
RD
/W
Table 1. Register Address Definition (continued)
Table 2. Hex Register Address Definition
HEX REGISTER ADDRESS/DESCRIPTION
WRITE
ADDRESS/
COMMAND
BYTE
(HEX)
READ
ADDRESS/
COMMAND
BYTE
(HEX)
DESCRIPTION
POR
CONTENTS
80
81
Seconds
00
82
83
Minutes
00
84
85
Hours
00
86
87
Date
01
88
89
Month
01
8A
8B
Day
01
8C
8D
Year
70
8E
8F
Control
00
92
93
Century
19
96
97
Reserved
07
BE
BF
Clock Burst
N/A
C0
C1
RAM 0
Indeterminate
C2
C3
RAM 1
Indeterminate
C4
C5
RAM 2
Indeterminate
C6
C7
RAM 3
Indeterminate
C8
C9
RAM 4
Indeterminate
CA
CB
RAM 5
Indeterminate
CC
CD
RAM 6
Indeterminate
CE
CF
RAM 7
Indeterminate
Note: POR STATE defines power-on reset state of register contents.