s-35399a03 Seiko Instruments Inc., s-35399a03 Datasheet - Page 20

• Manufacturer Part Number: s-35399a03
• Description: 2-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

20
2-WIRE REAL-TIME CLOCK
S-35399A03
Register Statuses After Initialization
The status of each register after initialization is as follows.
SDA
SCL
Real-time data register :
Status register 1 :
Status register 2 :
INT1 register :
INT2 register :
Clock correction register :
Free register 1 :
Free register 2 :
Free register 3 :
Up counter :
Alarm expansion register 1 :
Alarm expansion register 2 :
Code + command
0
1
1
1
Write to status register 1
: Input from master device
0
: Output from S-35399A03
0
0
0 0
Figure 21 Data of Status Register 1 at Initialization
Write “1” to reset flag and SC0.
R/W
1
9
B7 B5
00 (Y), 01 (M), 01 (D), 0 (day of the week), 00 (H), 00 (M), 00 (S)
“0 B6 B5 B4 0 0 0 0 b”
(In B6, B5, B4, the data of B6, B5, B6 in the status register 1 at initialization is set.
Refer to Figure 21 .)
“00h”
“00h”
“00h”
“00h”
“00h”
“00h”
“00h”
Is not initialized and continues counting.
“00h”
“00h”
0
1
0
0
0
Seiko Instruments Inc.
0 0
18
0
Code + comman
0
1
1
1
Read from status register 1
0
0
0
0 1
R/W
9
L
B7 B5 : Not reset
L
H
L
L
L
L L
18
0
Rev.1.0
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