I Command Configuration
READ 1(Data Read)
READ 2(Data Read)
WRITE 1(Data Write)
WRITE 2(Data Write)
1 1 1 0××××
1 1 1 1××××
1 0 0 1××××
1 0 0 0××××
1 0 1 1 D3 D2 D1 D0
Output from the year data
Output from the day data
Input from the year data
Input from the day data
Test mode start
Test mode end
I Data Configuration
The S-3510 series is provided with a timer data BCD (Binary Coded Decimal) display*1 device and an
automatic calendar. A set of flags are configured as follows:
Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 Year data (0 to 99)
0 0 0 M4 M3 M2 M1 M0 Month data (1 to 12)
0 0 D5 D4 D3 D2 D1 D0
Date data (1 to 31)
12/24 TPEN TPF FRE TEST W2 W1 W0
Status and day data (1 to 7)
AM/PM 0 H5 H4 H3 H2 H1 H0
Hour data (0 to 23 or 0 to 11) and flags
POW m6 m5 m4 m3 m2 m1 m0
Minute data (0 to 59) and flags
BLD S6 S5 S4 S3 S2 S1 S0
Second data (0 to 59) and flags
*1. AM/PM Flag : When writing in 12-hour display mode, always input 0 for AM and 1 for PM.
In 24-hour display mode, it is unnecessary as both 1 and 0 are ignorged.
However, when reading the time in either display mode 0 is read as AM 1 as PM.
BLD Flag :
When a decrease in the voltage is detected, it is set to 1. This is valid during
reading and is invalid during writing.
POW Flag :
1 is set at the power on, and cleared through the RESET command.
This flag is ingored during writing.
When the test mode is set, it is set to 1. When the bit is 1, always use the TEST
END or RESET command to set to 0. This bit is valid for reading and ignored
4 Seiko Instruments Inc.