S-35392A Datasheet, PDF (15/47 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

Rev.1.3_00
2-WIRE REAL-TIME CLOCK
S-35392A
(2) Free register (INT1 register)
The INT1 register is a 1-byte SRAM type register that can be set freely by users.
B7
B6
B5
B4
B3
B2
B1
B0
SC3
SC4
SC5
SC6
SC7
SC8
SC9
SC10
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W: Read/Write
Figure 13 INT1 Register (Free Register)
(3) Output of user-set frequency (INT2 register)
The INT2 register is a 1-byte data register to set up the output frequency. Setting each bit B7 to B3 in the register to
“1”, the frequency which corresponds to the bit is output in the AND-form. SC11 to SC13 in the INT2 register are 3-bit
SRAM type registers that can be freely set by users.
B7
B6
B5
B4
B3
B2
B1
B0
1 Hz
2 Hz
4 Hz
8 Hz
16 Hz
SC11
SC12
SC13
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W: Read/Write
Figure 14 INT2 Register (Data Register for Output Frequency)
Example: B7 to B3 = 50h
16 Hz
8 Hz
4 Hz
2 Hz
1 Hz
INT2 pin output
Status register 2
• Set to INT2FE = 1
Figure 15 Example of Output from INT2 Register (Data Register for Output Frequency)
Seiko Instruments Inc.
15