User's Manual

6
1.4.4 IO and Peripheral Configuration Header
The device PCB connects the pins on this header to all IOs and peripherals provided by the onboard RFID B1 module
and a few pins are available providing +3.3V and GND signals.
J3.1 – GPIO 0
J3.2 – GPIO 2
J3.3 – GPIO 1
J3.4 – GPIO 3
J3.5 – GND
J3.6 – 3.3 V
J3.7 – IDAC (Digital to Analog Converter with current-type output)
J3.8 – GND
J3.9 – COMP (Comparator positive input)
J3.10 – GND
J3.11 – ADC (Analog to Digital Converter input)
J3.12 – GND
J3.13 – GND
J3.14 – nRST (nRESET – reset input signal – active low)
J3.15 – nSLEEP (Output signal indicating the device is in Sleep Mode or Power Down Mode – active low)
J3.16 – nPWRDN (Power Down Request input signal – active low)