RS5C372B-E2-F Datasheet, PDF (49/57 Pages) RICOH electronics devices division – I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC

RS5C372A/B
5.2 Example of Interface Circuit to the CPU
 RS5C372A
System power supply
Backup power supply
RS5C372A
INTRA
VDD
INTRB
OSCIN
OSCOUT
VSS
SCL
SDA
32.768kHz or
32.000kHz
Microcontroller
VDD
) The SCL and SDA pins of the RS5C372A do not contain protective diodes on VDD side. Therefore, back up
power supplysystem power supply causes no adverse effect.
 RS5C372B
System power supply
Backup power supply
RS5C372B
32KOUT
VDD
INTR
OSCIN
OSCOUT
VSS
SCL
SDA
32.768kHz or
32.000kHz
Microcontroller
VDD
) The SCL and SDA pins of the RS5C372B do not contain protective diodes on VDD side. Therefore, back up
power supplysystem power supply causes no adverse effect.
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