RFID Reader documentation v2.1

Connecting and Testing (Serial Version)

The Parallax RFID Card Reader serial version can be integrated into any microcontroller design using only

four connections (VCC, /ENABLE, SOUT, GND). Use the following circuit for connecting the Parallax RFID

Card Reader to the BASIC Stamp microcontroller.

Pin Pin Name Type Function

1 VCC P System power, +5V DC input.

2 /ENABLE I

Module enable pin. Active LOW digital input. Bring this pin LOW to

enable the RFID reader and activate the antenna.

3 SOUT O

Serial Output TTL-level interface, 2400bps, 8 data bits, no parity, 1 stop

bit.

4 GND G System ground. Connect to power supply’s ground (GND) terminal.

Note: Type: I = Input, O = Output, P = Power, G = Ground