RS5C338A-E2 Просмотр технического описания (PDF) - RICOH Co.,Ltd.

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RS5C338A-E2

3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICS WITH VOLTAGE MONITORING FUNCTION

RICOH Co.,Ltd. 

R×5C338A

6.2 Connection of INTR Pin

The INTR pin follows the N-channel open drain output logic and contains no protective diode on the power supply

side. As such, it can be connected to a pull-up resistor of up to 5.5 volts regardless of supply voltage.

R× 5C338A

INTR

OSCIN

OSCOUT

VDD

VSS

System power supply

A

B *1

32.768kHz

Backup power supply

*1) Depending on whether the INTR pin is to be used during bat-

tery backup, it should be connected to a pull-up resistor at the

following different positions:

1) Position A in the left diagram when it is not to be used during

battery backup.

2) Position B in the left diagram when it is to be used during

battery backup.

6.3 Connection of 32KOUT Pin

As the 32KOUT pin is CMOS output, the voltages of the R×5C338A and any devices to be connected should be the

same. When the device is powered down, the 32KOUT output should be disabled.

When the CLKC pin is connected to the system power supply through the pull-up resistor, the pull-up resistor

should be 0Ω to 10kΩ, and the 32KOUT pin should be connect to the host through the resistor (approx. 10kΩ).

R× 5C338A

CLKC

32KOUT

OSCIN

OSCOUT

VDD

VSS

System power supply

* Voltage detector IC 1

32.768kHz

Backup power supply

R× 5C338A

CLKC

32KOUT

OSCIN

OSCOUT

VDD

VSS

System power supply

0 to 10kΩ

Approx.10kΩ

Backup power

supply

32.768kHz

Host

*1) RN5VL××C by RICOH.

39

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