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| 31 || GPIO6 for AC power loss detection (Jumper for PLD inserted, High=power loss,Low=Power supply normal)
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| 37 || GPIO26 for power management <span style="color:red;">(For New add from V2.0 and later versions only)</span>
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| 38 || GPIO20 for buzzer control <span style="color:red;">(New add from V2.1 )</span>