3-WIRE REAL-TIME CLOCK
S-35190A
Rev.2.4_00
Examples of Application Circuits
VCC
10 kΩ
System power supply
VCC
INT
CS
VDD
CPU
S-35190A
SIO
VSS
XIN
SCK
VSS
XOUT
Cg
Caution 1. Because the I/O pin has no protective diode on the VDD side, the relation of VCC ≥ VDD is possible.
But pay careful attention to the specifications.
2. Start communication under stable condition after power-on the power supply in the system.
Figure 42 Application Circuit 1
System power supply
10 kΩ
VCC
INT
VDD
VSS
CS
10 kΩ
CPU
S-35190A
SIO
SCK
VSS
XIN
XOUT
Cg
Caution Start communication under stable condition after power-on the power supply in the system.
Figure 43 Application Circuit 2
Caution The above connection diagrams do not guarantee operation. Set the constants after performing
sufficient evaluation using the actual application.
Seiko Instruments Inc.
35
SII [ SEIKO INSTRUMENTS INC ]
