Advanced Card ACR100I 참조 매뉴얼 - 페이지 18

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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: www.usb.org.

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.

ACR100I – Reference Manual

Version 1.00

Page 18 of 20