s-35399a02 Seiko Instruments Inc., s-35399a02 Datasheet - Page 20

• Manufacturer Part Number: s-35399a02
• Description: 2-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

20
2-WIRE REAL-TIME CLOCK
S-35399A02
FOUT pin
8. FOUT setting register 1 and FOUT setting register 2
256 Hz
128 Hz
Setting example: FOUT setting register 1 : B7 to B0 = 80h,
64 Hz
FOUT setting register 1 and 2 are 1-byte data registers to set up the output frequency for the FOUT pin. As well as the
function output of user-set frequency, in the INT1 (INT2) register, by setting each bit in the register to “1”, the frequency,
which corresponds to the bit, is output in the AND-form. Figure 24 shows the setting example. At power-on, the FOUT
setting register 1 and 2 are set to “00h” so that no clock pulses are output. The value of output voltage is defined by V
32Hz
*1. The value of output voltage is defined by V
256 Hz
R/W
1 Hz
R/W
B7
B7
Set data in FOUT setting register 1 and FOUT setting register 2
FOUT setting register 2 : B7 to B0 = 05h
512 Hz
R/W
2 Hz
R/W
B6
B6
1 kHz
R/W
R/W
Figure 24 Example of output of clock pulse
4 Hz
B5
B5
Figure 22 FOUT Setting Register 1
Figure 23 FOUT Setting Register 2
2 kHz
Seiko Instruments Inc.
R/W
8 Hz
R/W
*1
B4
B4
DDL
. Set V
4 kHz
R/W
16 Hz
R/W
B3
DDL
B3
≤ V
*1
DD
.
8 kHz
32 Hz
R/W
R/W
B2
B2
R/W: Read/Write
R/W: Read/Write
16 kHz
64 Hz
R/W
R/W
B1
B1
32 kHz
128 Hz
R/W
R/W
B0
B0
Rev.1.0
*1
_00
DDL
.