s-35199a01 Seiko Instruments Inc., s-35199a01 Datasheet - Page 21

• Manufacturer Part Number: s-35199a01
• Description: 3-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

Rev.1.0
8. FOUT setting register 1 and FOUT setting register 2
FOUT pin
Setting example: FOUT setting register 1 : B7 to B0 = 80h,
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 INT register 1, by setting each bit in the register to “1”, the frequency, which
corresponds to the bit, is output in the AND-form. Figure 25 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
256 Hz
128 Hz
*1. The value of output voltage is defined by V
64 Hz
32Hz
_00
256 Hz
1 Hz
R/W
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
2 Hz
R/W
R/W
B6
B6
1 kHz
Figure 25 Example of output of clock pulse
4 Hz
R/W
R/W
B5
B5
Figure 23 FOUT Setting Register 1
Figure 24 FOUT Setting Register 2
2 kHz
Seiko Instruments Inc.
8 Hz
R/W
R/W
B4
B4
DDL
*1
. Set V
4 kHz
16 Hz
R/W
R/W
DDL
B3
B3
≤ V
*1
DD
.
8 kHz
32 Hz
R/W
R/W
B2
B2
R/W: Read/Write
R/W: Read/Write
3-WIRE REAL-TIME CLOCK
16 kHz
64 Hz
B1
B1
R/W
R/W
128 Hz
32 kHz
R/W
R/W
B0
B0
S-35199A01
DDL
.
*1
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