em78p510nso32j/s ELAN Microelectronics Corp, em78p510nso32j/s Datasheet - Page 60

• Manufacturer Part Number: em78p510nso32j/s
• Description: 8-bit Microprocessor With Otp Rom
• Manufacturer: ELAN Microelectronics Corp

EM78P510N
8-Bit Microprocessor with OTP ROM
54 •
6.7.2 Residue-Voltage Protection
When battery is replaced, device power (VDD) is taken off but residue-voltage remains.
The residue-voltage may trips below Vdd minimum, but not to zero. This condition may
cause a poor power-on reset. Figure 6-13 and Figure 6-14 show how to build a
residue-voltage protection circuit.
/RESET
VDD
Figure 6-13 Residue Voltage Protection Circuit 1
Figure 6-14 Residue Voltage Protection Circuit 2
100K
Q1
(This specification is subject to change without further notice)
Product Specification (V1.1) 01.25.2008
10K
1N4684
33K
VDD