3-WIRE REAL-TIME CLOCK
S-35190A
Rev.2.4_00
Register Status After Initialization
The status of each register after initialization is as follows.
Real-time data register :
Status register 1 :
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 23.)
“00h”
“00h”
“00h”
“00h”
“00h”
Status register 2 :
INT register 1 :
INT register 2 :
Clock correction register :
Free register :
Write to status register 1
Read from status register 1
CS
SCK
SIO
X
0 1 1 0 0 0 0 0
0 1 1 0 0 0
0 1
0 0 1 0 0 0 0
1
0 1 0 0 0 0 0
0
Fixed code + command
Fixed code + command
B5 : Not reset
B7 B5
Write “1” to reset flag and
SC0.
Figure 23 Status Register 1 Data at Initialization
Seiko Instruments Inc.
19
SII [ SEIKO INSTRUMENTS INC ]
