EM78P156 Просмотр технического описания (PDF) - Elan Microelectronics Corp

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производитель

EM78P156

8-BIT MICRO-CONTROLLER

Elan Microelectronics Corp 

EM78P156E

VI.11 Residue Voltage Protection

In some applications, replacing battery as an instance, device power (Vdd) is taken off and recovered within a few

seconds. A residue voltage, which trips below Vdd min but not to zero, may exist. This condition may cause a poor

power-on reset. Fig.15 and Fig.16 show how to build the residue voltage protection circuit

VDD

EM78P156E

/RESET

Q1

100K

VDD

33K

10K

IN4684

Fig. 15 Circuit 1 for the residue voltage protection

VDD

EM78P156E

Q1

/RESET

R3

VDD

R1

R2

Fig. 16 Circuit 2 for the residue voltage protection

* This specification is subject to be changed without notice. 8.11.1999

B3-22

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