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參數(shù)資料
| 型號(hào)： | PL-2521 |
| 英文描述： | PL-2521 Hi-Speed USB Cellular Mate and Flash Disk Controller Product Datasheet v1.0|Doc - Data Sheet?-- ?PL-2521 Hi-Speed USB CellularMate and Flash Disk Controller |
| 中文描述： | 特等- 2521高速USB細(xì)胞伴侶和U盤(pán)控制器產(chǎn)品數(shù)據(jù)表1.0 |文件-數(shù)據(jù)表？ - ？特等- 2521高速USB CellularMate和U盤(pán)控制器 |
| 文件頁(yè)數(shù)： | 5/19頁(yè) |
| 文件大?。?/td> | 190K |
| 代理商： | PL-2521 |
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Release Date
August 2003
ds_pl2507_v13
PL-2507 Product Datasheet
- 13 -
Document Version 1.3
6.0 Device Control Requests
PL-2507 supports three types of requests:
Standard USB device request set, which perform general functions for supporting the bus and
bus related functions.
Mass Storage class request set, which is an USB class defined to implement storage device
over USB protocol.
Vender specific requests, which are implemented to provide additional control and verification
method upon the optional external serial EEPROM.
6.1 Standard Device Control Requests
SET_FEATURE/CLEAR_FEATURE: Supports DEVICE_REMOTE_WAKEUP and
ENDPOINT_STALL for all endpoints. Requests with incorrect bmRequestType or endpoint
number will be stalled.
SET_CONFIGURATION/GET_CONFIGURATION
GET_INTERFACE/SET_INTERFACE
SET_ADDRESS
GET_STATUS
GET_DESCRIPTOR
SET_DESCRIPTOR and SYNCH_FRAME are not supported by the PL-2507.
6.2 Class Specific Requests
Command
bmType
bRequest
wValue
wIndex
wLength
Data
Note
Bulk-Only Mass
Storage Reset
0x21
0xFF
0
interface
0
None
Get Max LUN
0xA1
0xFE
0
interface
1
1 byte
6.2.1 Bulk-Only Mass Storage Reset
This request is used to reset the mass storage device and its associated interface. This class-specific
request shall ready the device for the next CBW from the host. The host shall send this request via
the default pipe to the device. The device shall preserve the value of its bulk data toggle bits and
endpoint STALL conditions despite the Bulk-Only Mass Storage Reset. The device shall NAK the
status stage of the device request until the Bulk-Only Mass Storage Reset is complete.
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