S-35392A Datasheet, PDF (10/47 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

2-WIRE REAL-TIME CLOCK
S-35392A
Rev.1.3_00
„ Configuration of Register
1. Real-time data register
The real-time data register is a 7-byte register that stores the data of year, month, day, day of the week, hour, minute, and
second in the BCD code. To Write/Read real-time data 1 access, transmit/receive the data of year in B7, month, day, day
of the week, hour, minute, second in B0, in 7-byte. When you skip the procedure to access the data of year, month, day,
day of the week, Read/Write real-time data 2 access. In this case, transmit/receive the data of hour in B7, minute, second
in B0, in 3-byte.
Year data (00 to 99)
Start bit of real-time data 1 data access
Y1 Y2 Y4 Y8 Y10 Y20 Y40 Y80
B7
B0
Month data (01 to 12)
M1 M2 M4 M8 M10 0
B7
0
0
B0
Day data (01 to 31)
D1 D2 D4 D8 D10 D20 0
0
B7
B0
Day of the week data (00 to 06)
W1 W2 W4 0
0
0
0
0
B7
B0
Hour data (00 to 23 or 00 to 11)
Start bit of real-time data 2 data access
H1 H2 H4 H8 H10 H20 AM / PM 0
B7
B0
Minute data (00 to 59)
m1 m2 m4 m8 m10 m20 m40 0
B7
B0
Second data (00 to 59)
s1 s2 s4 s8 s10 s20 s40 0
B7
B0
Figure 9 Real-Time Data Register
10
Seiko Instruments Inc.