ACR100I – Reference Manual
Version 1.00
www.acs.com.hk
Page 18 of 20
C_SEL
The currently selected card type. A value of 00h means that no card type has been
selected.
C_STAT
Indicates whether a card is physically inserted in the reader and whether the card is
powered up:
00h: no card inserted
01h: card inserted, not powered up
03h: card powered up
7.2. Mass Storage
Mass Storage Device Class specifies all protocols required for data transaction between the Host
(computer) and storage devices. The configurations and usage of USB endpoints on ACR100I shall
follow
Mass Storage Class Bulk-Only Transport
in Section 3 (Protocol Code) of the
USB Mass
Storage Device Specification
. This document is available at:
An overview of this specification is summarized below:
1.
Control Commands
are sent on control pipe (default pipe). It is shared with the CCID
interface.
2.
Data-Out Command Protocol
uses the
Bulk-OUT
endpoint to transfer data from the host to
the device.
3.
Data-In Command Protocol
uses the
Bulk-IN
endpoint to transfer data from the device or to
return status about the device.
