S-35399A02 Datasheet, PDF (44/55 Pages) Seiko Instruments Inc – 2-WIRE REAL-TIME CLOCK

2-WIRE REAL-TIME CLOCK
S-35399A02
„ Examples of Application Circuits
10 kΩ
VDDL
VDD
INT1
INT2
S-35399A02
SDA
VSS
SCL
CTRL
FOUT
XIN XOUT F32K
10 kΩ
C_g
V_{C C}
VCC
CPU
Rev.1.0_00
System
power supply
VSS
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 58 Application Circuit 1
VDDL
VDD
INT1
INT2
S-35399A02
SDA
VSS
SCL
CTRL
FOUT
XIN XOUT F32K
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 59 Application Circuit 2
Caution The above connection diagrams do not guarantee operation. Set the constants after performing
sufficient evaluation using the actual application.
44
Seiko Instruments Inc.