ACR1255U-J1 – Reference Manual
Version V1.01
www.acs.com.hk
Page 8 of 73
For USB communication architecture, the protocol between ACR1255U-J1 and other devices follow
the CCID protocol. All communications for NFC are PC/SC–compliant.
Figure 2
: ACR1255U-J1 USB Communication Architecture
ACR1255U-J1 PCSC
NFC Interface
USB Interface
(CCID)
PCSC Layer
T=CL & T=1
Emulation
ISO 14443/ISO 18092
Interface
NFC
(Built-in Antenna)
Physical
Interface