硬體線路說明:
(1) LPC1850應用USB self-power device
(2) ADC0_2(A4 pin)經由R103及R104 10K分壓電阻去偵測USB0_VBUS電壓的狀況
問題 : 由於是USB self-power供電 ,會有USB0_VBUS有電MCU未供電的情況發生
此時是否會造成ADC0_2 pin(<3.6V)的損害?
依照Datasheet描述:
(a) 使用ADC0_2設定在 5V Tolerant pad(ex:PF_8)是可接受<3.6V
(b) 使用ADC0_2 (A4 pin)單獨在analog pad並未說明是否承受3.6V以下電壓
Thanks
Eric @SAC
Hi Eric,
After contacted with the AE, they'd like to suggest the the analog input doesn't exceed the 3.6V.
Have a great day,
Ping
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