Advanced Card Systems Limited ACR1222LD1 用户手册
ACR122L-USB-ACS
4.0. Implementation
4.1. The ACR122L-USB is built based on the ST221 and PN5321
chips.
ST2211U
Host Controller
PN532
NFC Interface
Chip
Built-In
Antenna
SPI
SAM1
PC
Windows
operating
operating
system
USB
USB
Firmware
Upgrade
Buzzer
&LED1
&LED2
&LED3
&LED4
&LED2
&LED3
&LED4
PICC
Contactless Card
USB2.0
Contactless Interface
Carrier =13.56MHz
ISO7816 Interface
Logic switch
SAM2
SAM3
LCD