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EM78F651NAMS/NAMJ Datenblatt(PDF) 48 Page - ELAN Microelectronics Corp

Teilenummer EM78F651NAMS/NAMJ
Bauteilbeschribung  8-Bit Microcontroller
PDF  58 Pages
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Hersteller  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78F651NAMS/NAMJ Datenblatt(HTML) 48 Page - ELAN Microelectronics Corp

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EM78F651N
8-Bit Microcontroller
44
•
Product Specification (V1.1) 10.20.2006
(This specification is subject to change without further notice)
The capacitor C will discharge rapidly and fully. Rin, the current-limited resistor, will
prevent high current or ESD (electrostatic discharge) from flowing to pin /RESET.
EM78F651N
/RESET
Vdd
D
R
Rin
C
Fig. 6-15 External Power-Up Reset Circuit
6.13 Residue-Voltage Protection
When battery is replaced, device power (Vdd) is taken off but residue-voltage
remains. The residue-voltage may trip below Vdd minimum, but not to zero. This
condition may cause a poor power-on reset. Fig 6-16 and Fig 6-17 shows how to
build a residue-voltage protection circuit.
EM78F651N
/RESET
Vdd
40K
Q1
1N4684
10K
33K
Vdd
Fig. 6-16 Circuit 1 for the Residue Voltage Protection



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