- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384068 > μPD9210FGC-7EA (NEC Corp.) USB Host Controller(USB主控制器) PDF資料下載
參數(shù)資料
| 型號： | μPD9210FGC-7EA |
| 廠商： | NEC Corp. |
| 英文描述： | USB Host Controller(USB主控制器) |
| 中文描述： | USB主機控制器（的USB主控制器） |
| 文件頁數(shù)： | 28/95頁 |
| 文件大?。?/td> | 423K |
| 代理商： | ΜPD9210FGC-7EA |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁當前第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁
CHAPTER 3 DESCRIPTION OF USB HOST CONTROLLER FUNCTIONS
28
Figure 3-2. Full Speed Device Cable and Resistor Connections
R
1
D
+
D
–
D
+
D
–
R
1
R
2
F.S./L.S.USB
Transceiver
Twisted Pair Shielded
Host or
Hub Port
5 Meters max.
Z
0
= 90
±
15 %
R
1
=15 k
R
2
=1.5 k
F.S. USB
Transceiver
Hub Upstream Port
or
Full Speed Function
Figure 3-3. Low Speed Device Cable and Resistor Connections
R
1
D
+
D
–
D
+
D
–
R
1
R
2
F.S./L.S.USB
Transceiver
Untwisted, Unshielded
Host or
Hub Port
3 Meters max.
R
1
= 15 k
R
2
= 1.5 k
L.S. USB
Transceiver
Low Speed Function
The host schedules and manages data transfers. Consequently, transfers must always be started by the host,
and all transfers are performed using up to three packets (token, data, and handshake packets). The token packet
sends USB devices information on the processing direction, type of transaction, address, endpoint, etc. The USB
device decodes the address field and determines whether or not it has been accessed. The data packet contains the
data that is sent in the direction (from host to device or from device to host) that is specified by the token packet. The
handshake packet is returned to the source of the transfer to indicate whether or not the transfer was successful.
The following four types of transfers occur between USB hosts and USB devices.
Interrupt transfer
This is a small data transfer which is used to send information from a USB device to
client software. The HCD (Host Controller Driver) sends a token packet to a device
within the period required by the device, after which the USB data transfer is executed.
Isochronous transfer
This is a periodic data transfer that uses a constant data transfer rate.
Control transfer
This is a non-periodic data transfer that is used to send information about configuration,
commands, and status between the client software and a USB device.
Bulk transfer
This is a non-periodic data transfer that is used to send large amounts of information
between the client software and a USB device.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| μPD98402A | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| μPD98402 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| μPD98404 | High-performance ATM controller(高性能異步傳輸模式控制器) |
| μPD98405 | 155M ATM Integrated SAR Controller(155M ATM SAR集成控制器) |
| μPD98408 | ATM Physical Interface(ATM 物理接口) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PD93-21C | 功能描述:光電二極管 Photodiode RoHS:否 制造商:Vishay Semiconductors 產(chǎn)品:Photodiodes 反向電壓:10 V 最大暗電流:30 nA 峰值波長:565 nm 上升時間:3.1 us 下降時間:3 us 半強度角度:50 deg 封裝 / 箱體:TO-5 |
| PD93-21C/TR8 | 功能描述:PHOTODIODE PIN CLEAR MINI SMD RoHS:是 類別:傳感器，轉(zhuǎn)換器 >> 光學 - 光電檢測器 - 光電二極管 系列:- 標準包裝:1 系列:- 波長:850nm 顏色 - 增強型:- 光譜范圍:400nm ~ 1100nm 二極管類型:引腳 nm 下響應率:0.62 A/W @ 850nm 響應時間:5ns 電壓 - (Vr)（最大）:50V 電流 - 暗（標準）:1nA 有效面積:1mm² 視角:150° 工作溫度:-40°C ~ 100°C 封裝/外殼:徑向，5mm 直徑（T 1 3/4） 其它名稱:475-2649-6 |
| PD-94460C | 制造商:IRF 制造商全稱:International Rectifier 功能描述:HYBRID-HIGH RELIABILITY DC/DC CONVERTER |
| PD-9501G | 制造商:Microsemi Corporation 功能描述:MULTI MEDIA CARD - Bulk |
| PD-9501G/AC | 制造商:Microsemi Corporation 功能描述:1-PORT HIGH POWER MIDSPAN, 60W, 10/100/1000 BASET, AC INPUT - Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復。