Advanced Card ACR100I, Справочное руководство

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ACR100I – Reference Manual
info@acs.com.hk
Version 1.00
www.acs.com.hk
Page 8 of 20
6.0. USB Interface
The connection of the ACR100I to a computer through a USB port follows a USB Standard.
6.1. Communication Parameters
The ACR100I is connected to a computer through USB as specified in the USB Specification 2.0. The
ACR100I is working in high-speed mode, i.e. 480 Mbps.
6.2. Endpoints
The ACR100I uses the following endpoints to communicate with the host computer.
6.2.1. Smart Card Reader
6.2.2. Mass Storage
Control
Endpoint
For setup and control purpose
Bulk OUT
For command to be sent from host to Device (data packet size is 512
bytes)
Bulk IN
For response to be sent from Device to host (data packet size is 512
bytes)
Pin Signal Function
1 V
BUS
+5 V power supply for the reader (Max 500 mA, Normal 300 mA)
2 D- Differential signal transmits data between ACR100I and computer.
3 D+ Differential signal transmits data between ACR100I and computer.
4 GND Reference voltage level for power supply
Control
Endpoint
For setup and control purpose
Bulk OUT
For command to be sent from host to ACR100I (data packet size is 64
bytes).
Bulk IN
For response to be sent from ACR100I to host (data packet size is 64
bytes).
Interrupt IN
For card status message to be sent from ACR100I to host (data packet
size is 8 bytes).