EM78P152S datasheet(33/52 Pages) ETC1

Part #	EM78P152S

Description	8-Bit Microcontroller with OTP ROM

PDF	52 Pages

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Manufacturer	ETC1 [List of Unclassifed Manufacturers]

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EM78P152/3S

8-Bit Microcontroller with OTP ROM

5.12 Residue-Voltage Protection

When the battery is replaced, the device power (Vdd) is cut off but residue-voltage

remains. The residue-voltage may trip below the minimum Vdd, but not to zero. This

condition may cause a poor power-on reset. The following figures illustrate two

recommended methods on how to build a residue-voltage protection circuit for the

EM78P152/3S.

EM78P153S

/RESET

Vdd

100K

1N4684

10K

33K

Vdd

* Figure 5-15 Residue Voltage Protection Circuit 1

EM 78P153S

/RESET

Vdd

* Figure 5-16 Residue Voltage Protection Circuit 2

Note:

* Figure 5-15 and Figure 5-16 should be designed with their /RESET pin voltage larger than VIH(min).

Product Specification (V1.8) 09.08.2009

• 29

(This specification is subject to change without further notice)

EM78P152S Datasheet(PDF) 33 Page - List of Unclassifed Manufacturers