ACS ACR101 SIMicro (CCID) - Manual (Page 8)

6.0. USB Interface
The ACR101 (CCID) is connected to a computer through a USB following the USB standard.
6.1. Communication Parameters
The ACR101 (CCID) is connected to a computer through USB as specified in the USB Specification.
The ACR101 (CCID) is working in high speed mode, i.e. 480 Mbps, for the flash memory.
Pin Signal Function
1 V
BUS
+5V power supply for the reader
2 D- Differential signal transmits data between ACR101 (CCID) and PC.
3 D+ Differential signal transmits data between ACR101 (CCID) and PC.
4 GND Reference voltage level for power supply
6.2. Endpoints
The ACR101 (CCID) uses the following endpoints to communicate with the host computer:
Control Endpoint 0 For setup and control purposes
Bulk OUT Endpoint 1 For the command to be sent from host to Mass Storage Interface
(data packet size is 64 bytes)
Bulk IN Endpoint 1 For response to be sent from Mass Storage Interface to host (data
packet size is 64 bytes)
Bulk OUT Endpoint 2 For command to be sent from host to CCID Interface (data packet
size is 16 bytes)
Bulk IN Endpoint 2 For response to be sent from CCID Interface to host (data packet
size is 16 bytes)
Document Title Here Document Title Here
Document Title Here ACR101 PC/SC Memory Card Access
Version 1.0
Page 8 of 19
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