S-35390A Seiko Instruments, S-35390A Datasheet - Page 14

• Manufacturer Part Number: S-35390A
• Description: 2-Wire Real Time Clock
• Manufacturer: Seiko Instruments

14
2-WIRE REAL-TIME CLOCK
S-35390A
(2) Selected frequency steady interrupt
INT2 pin output
Example
Figure 13 INT1 Register_1 and INT1 Register_2 (Frequency Duty Data) Output Example
INT1 pin or
MSB
Data set in INT1 register_1 and INT1 register_2 is considered as frequency duty data. By setting each
bit from B4 to B0 of the register to “1”, the frequency corresponding to each bit is selected in an
ANDed form. The SC bits configure a 3-bit SRAM type register that can be set freely by users. These
bits can be read and written within the operating voltage range (1.3 to 5.5 V). There is no impact on
the duty function.
16 Hz
8 Hz
4 Hz
2 Hz
1 Hz
Figure 12 INT1 Register_1 and INT1 Register_2 (Frequency Duty Data)
B4 to B0 = 0Ah
R/W
Set to INT1FE or INT2FE = 1
SC
B7
R/W
SC
B6
R/W
SC
B5
Seiko Instruments Inc.
16 Hz
R/W
B4
R/W
8 Hz
B3
4 Hz
R/W
B2
R/W: Read/write-enabled
2 Hz
R/W
B1
R/W
1 Hz
B0
Rev.1.2
LSB
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