S-24C128C Datasheet, PDF (19/35 Pages) Seiko Instruments Inc – Write protect function during the low power supply voltage

Rev.4.0_02_H
2-WIRE SERIAL E²PROM
S-24C128C
 Write Protect Function during the Low Power Supply Voltage
The S-24C128C has a built-in detection circuit which operates with the low power supply voltage, cancels Write when the
power supply voltage drops and power-on. Its detection and release voltages are 1.20 V typ. (Refer to Figure 19).
The S-24C128C cancels Write by detecting a low power supply voltage when it receives a stop condition.
In the data trasmission and the Write operation, data in the address written during the low power supply voltage is not
assurable.
Power Supply Voltage
Detection Voltage (−V_DET)
1.20 V typ.
Release Voltage (+V_DET)
1.20 V typ.
Write Instruction cancel
Figure 19 Operation during Low Power Supply Voltage
19