ACR122L – Communication Protocol
Version 1.03
www.acs.com.hk
Page 6 of 57
2.3. LEDs
Four user-controllable single color LEDs are provided.
•
Control can be selected by firmware or by user.
•
From left to right, the colors of the LEDs are green, blue, orange and red.
2.4. Buzzer
A user-controllable monotone buzzer with a default state of OFF is provided.
2.5. SAM Interface
Three SAM sockets, supporting ISO 7816-1/2/3 T=0 cards, are provided.
2.6. Built-in Antenna
A 3-turn symmetric loop antenna, center-tapped, is provided.
•
Estimated size is 46 mm x 64 mm.
•
Loop inductance is approximately 1.6
μ
H to 2.5
μ
H.
•
Operating distance for different tags, is approximately up to 50 mm (depends on the tag).
•
Only one tag can be accessed at any one time.
