S-35390A Seiko Instruments, S-35390A Datasheet - Page 32

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S-35390A

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

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32
2-WIRE REAL-TIME CLOCK
S-35390A
Examples of Application Circuits
Caution
Caution 1. Because the I/O pin has no protective diode on the VDD side, the relation of V
Caution Communication should be executed after the system power supply is turned on
The above connection diagrams do not guarantee operation. Set the constants after
performing sufficient evaluation using the actual application.
VDD
VSS
VDD
VSS
2. Communication should be executed after the system power supply is turned on
and a stable state is obtained.
XIN
XIN
V
and a stable state is obtained.
S-35390A
DD
S-35390A
C
C
is possible. But pay careful attention to the specifications.
g
g
XOUT
XOUT
INT1
SDA
INT1
INT2
INT2
SCL
SDA
SCL
Figure 34 Application Circuit 1
Figure 35 Application Circuit 2
Power
switching
circuit
Seiko Instruments Inc.
External CPU
External CPU
VCC
VCC
VSS
V
VSS
CC
System
power supply
System
power supply
Rev.1.2
CC
_00

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