s-35190a Seiko Instruments Inc., s-35190a Datasheet - Page 11

• Manufacturer Part Number: s-35190a
• Description: 3-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

Rev.2.4
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.
_00
Year data (00 to 99)
Hour data (00 to 23 or 00 to 11)
Month data (01 to 12)
Day of the week data (00 to 06)
Second data (00 to 59)
Day data (01 to 31)
Minute data (00 to 59)
W1
H1
Y1
M1
B7
B7
B7
B7
D1
B7
m1
s1
B7
B7
Start bit of real-time data 2 data access
Start bit of real-time data 1 data access
W2
H2
M2
m2
D2
s2
Y2
Figure 14 Real-time Data Register
W4
H4
Y4
M4
D4
m4
s4
Seiko Instruments Inc.
H8
Y8
M8
D8
m8
s8
0
H10
M10
Y10
D10
m10
s10
0
H20
Y20
D20
m20
s20
0
0
AM / PM
m40
Y40
s40
0
0
0
3-WIRE REAL-TIME CLOCK
Y80
B0
B0
B0
B0
B0
B0
B0
0
0
0
0
0
0
S-35190A
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