參數(shù)資料
型號: EM78P447SB
廠商: ELAN Microelctronics Corp .
英文描述: 8-BIT MICRO-CONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 29/55頁
文件大?。?/td> 1730K
代理商: EM78P447SB
EM78P447S
OTP ROM
4.11 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. Fig.16 and Fig.17 show how to build
the residue-voltage protection circuit.
EM78P447N
/RESET
Vdd
40K
Q1
1N4684
10K
33K
Vdd
Fig.14 The Residue Voltage Protection Circuit 1
EM78P447N
/RESET
Vdd
Q1
Vdd
40K
R2
R1
Fig.15 The Residue Voltage Protection Circuit 2
This specification is subject to change without prior notice.
06.25.2003 (V1.1)
29
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