S-35190A Datasheet, PDF (35/53 Pages) Seiko Instruments Inc – 3-WIRE REAL-TIME CLOCK

Rev.2.4_00
„ Examples of Application Circuits
10 kΩ
INT
VDD
CS
VSS
S-35190A
SIO
SCK
XIN XOUT
3-WIRE REAL-TIME CLOCK
S-35190A
V_CC
VCC
System power supply
CPU
VSS
C_g
Caution 1. Because the I/O pin has no protective diode on the VDD side, the relation of V_CC ≥ V_DD 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
INT
VDD
CS
S-35190A
VSS
SIO
SCK
XIN XOUT
10 kΩ
10 kΩ
VCC
System power supply
CPU
VSS
C_g
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