參數(shù)資料
型號(hào): 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(jī)控制器(的USB主控制器)
文件頁(yè)數(shù): 37/95頁(yè)
文件大小: 423K
代理商: ΜPD9210FGC-7EA
CHAPTER 3 DESCRIPTION OF USB HOST CONTROLLER FUNCTIONS
37
The General TD’s Current Buffer Pointer indicates the data buffer address used for a data packet transfer to or
from an endpoint. If the transfer is completed without the occurrence of any kind of error, the HC advances the
Current Buffer Pointer by exactly the number of transferred bytes. If the buffer address indicated by the Current
Buffer Pointer exceeds the 4-K boundary during a data packet transfer, the high-order 20 bits of the Buffer End field
is copied to the working value from the Current Buffer Pointer. The next buffer address becomes byte 0 in the same
4-K page space that is used when the final byte is retained.
Figure 3-10. Current Buffer Pointer/Buffer End and 4-K Boundary
1 Data Packet
Current Buffer Pointer
4 K Boundary
4 K Boundary
Buffer END
4 K Boundary
4 k
3.4.3 Isochronous transfer descriptor format
Isochronous TDs are used only by isochronous endpoints. All TDs linked to the ED must use this format when F =
1. This TD is allocated to system memory in 32-byte units.
Figure 3-11. Isochronous TD Format
0
3
1
2
7
0
4
0
0
Dword 0
Dword 1
Dword 2
Dword 3
Dword 4
Dword 5
Dword 6
Dword 7
2
8
2
6
2
4
2
3
2
1
2
0
CC
DI
1
6
1
5
1
2
1
1
0
5
FC
Buffer Page 0 (BP0)
SF
Offset1/PSW1
Offset3/PSW3
Offset5/PSW5
Offset7/PSW7
Offset0/PSW0
Offset2/PSW2
Offset4/PSW4
Offset6/PSW6
NextTD
Buffer End (BE)
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(zhǎng):565 nm 上升時(shí)間:3.1 us 下降時(shí)間:3 us 半強(qiáng)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(lèi)別:傳感器,轉(zhuǎn)換器 >> 光學(xué) - 光電檢測(cè)器 - 光電二極管 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 波長(zhǎng):850nm 顏色 - 增強(qiáng)型:- 光譜范圍:400nm ~ 1100nm 二極管類(lèi)型:引腳 nm 下響應(yīng)率:0.62 A/W @ 850nm 響應(yīng)時(shí)間:5ns 電壓 - (Vr)(最大):50V 電流 - 暗(標(biāo)準(zhǔn)):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(chēng):475-2649-6
PD-94460C 制造商:IRF 制造商全稱(chēng):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