In RZ/A1H Group User Manual, under section '27.7.4 Processing of Analog Input Pin' of 'A/D convertor' it is mentioned that "To prevent damage from voltage surges at the analog input pins (AN0 to AN7), connect an input protection circuit like the one shown in Figure 27.8".
I would like to know whether this input protection circuit comes in-built in GR-PEACH board or it has to be connected externally when integrating a sensor to the GR-PEACH board?
Hi satz,
I checked the schematic diagram of GR-Peach (Rev. B, C, D, E, & F), and the analog pins are directly connected to the header. Meaning, the board doesn't have a built-in protection circuit for the analog pins.
http://www.core.co.jp/product/m2m/gr-peach/pdf/history/gr-peach_circuit_b.pdf
https://os.mbed.com/media/uploads/1050186/x28a-m01-cd.pdf
https://os.mbed.com/media/uploads/1050186/x28a-m01-ef.pdf
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