電子資料 USB制作資料 USB芯片資料及開(kāi)發(fā)工具 USBtools s4_5hw1_第1頁(yè)
電子資料 USB制作資料 USB芯片資料及開(kāi)發(fā)工具 USBtools s4_5hw1_第2頁(yè)
電子資料 USB制作資料 USB芯片資料及開(kāi)發(fā)工具 USBtools s4_5hw1_第3頁(yè)
電子資料 USB制作資料 USB芯片資料及開(kāi)發(fā)工具 USBtools s4_5hw1_第4頁(yè)
電子資料 USB制作資料 USB芯片資料及開(kāi)發(fā)工具 USBtools s4_5hw1_第5頁(yè)
已閱讀5頁(yè),還剩21頁(yè)未讀, 繼續(xù)免費(fèi)閱讀

下載本文檔

版權(quán)說(shuō)明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)

文檔簡(jiǎn)介

1、ELECTRICALSignaling and Power DistributionAndrew M. VolkIntel Corporation,Agenda,Signaling USB Data Signaling Reset Signaling Resume Signaling Power Distribution Power Budgets Self-powered Devices Bus-Powered Devices,Objectives,Reliable, Low Cost Physical Layer between Host, Hubs and Functions Data

2、Communication Limited power distribution Dynamic attach-detach,Data Signaling,Bi-directional, half-duplex link Embedded clock and data Differential signal pair 12 Mbit / sec Full Speed (F.S.) bit rate 1.5 Mbit / sec Low Speed (L.S.) bit rate,Signaling States,J-state Idle State Differentiates full or

3、 low speed K-state (Inverse of J-state) Start of Packet identifier (SOP) Signaling auto resume from power suspend Single ended zero (SE0) state End of Packet identifier (EOP) Signaling reset Disconnected line,USB Transceiver,Differential Driver Slew rate controlled SE0 drive capability Differential

4、Receiver Sensitivity 3.0V Single-Ended Receivers Threshold: 0.6V - 1.5V,-,+,D+,D-,Rcv Data,Single-Ended Receivers,DifferentialReceiver,SE0Detect,Xmt Data,Force SE0,OE,DifferentialDriver,USB Connections and Terminations,D-,D+,R1,R1 = 15K?% R2 = 1.5K?%,F.S./L.S. USB Transceiver,(45Outputs),Host or Hub

5、 Port,ZO = 90?5% 5 Meters Max.,F.S. USB Transceiver,(45Outputs),Hub Port 0 or Full Speed Function,R1,R2,D-,D+,R1,R1 = 15K?% R2 = 1.5K?%,F.S./L.S. USB Transceiver,(45Outputs),Host or Hub Port,3 Meters Max.,F.S. USB Transceiver,(45Outputs),Low Speed Function,R1,R2,D+,D-,D+,D-,Connect / Disconnect,Disc

6、onnect Detection,Full Speed Device Connect Detection,D+,D-,Low Speed Device Connect Detection,VOH (min) VIH (max) VIL (min) VOL (max) VSS,Connect Detected,Device Connected,Device Connected,D-,D+,Connect Detected,VOH (min) VIH (max) VIL (min) VOL (max) VSS,Device Disconnected,Disconnect Detected,VOH

7、(min) VIH (max) VIL (min) VOL (max) VSS,Packet DelimitersSOP, EOP,V,OH,(min),V,SE0,(max),V,SE0,(min),V,OL,(max),V,SS,Bus Idle,First Bitof Packet,SOP,V,OH,(min),V,SE0,(max),V,SE0,(min),V,OL,(max),V,SS,Bus Driven to Idle State,Last Bitof Packet,Bus Idle,Bus Floats,EOP,Data Encoding,NRZI data format Da

8、ta toggled on a ? Zero bit stuffing after 6 ones Ensures a data transition,R,a,w,D,a,t,a,B,i,t,S,t,u,f,f,e,d,D,a,t,a,N,R,Z,I,E,n,c,o,d,i,n,g,I,d,l,e,I,d,l,e,I,d,l,e,Sync Pattern,Packet Data,Sync Pattern,Six Ones,Packet Data,Packet Data,Sync Pattern,Stuffed Bit,Full Speed,12 Mb/s Frequency Tolerance

9、?500ppm Shielded, twisted cable Z0 = 90 ?5% Driver characteristics 45 ?5% Rise/ Fall time: Min 4ns, Max 20ns,Bus Driver,30,Equiv. Output Impedance 15 ,D+,30,D-,(45,Imped),(45,Imped),OE,TxD+,TxD-,Identical,CMOS,Buffers,Example implementation of a full speed driver,Vcc = 3.3 V ?0.3,Full Speed Signalin

10、g,VSS,Receiver Signal Pins,V,OL,(max),V,OH,(min),One Way Cable Delay,VSS,* (See note),*(Slight impedance mismatch shown),One Bit,Time,(12Mb/s),Driver Signal Pins,V,OL,(max),V,OH,(min),Round,Trip,Cable,Delay,Signal pins pass output spec levels after round trip cable delay,Signal pins pass output spec

11、 levels after one way trip on cable,Low Speed,1.5 Mb/s Unshielded, untwisted cable Saves EMI suppression costs 1.5% Frequency tolerance Driver characteristics Rise/ Fall time: Min 75ns, Max 300ns Required on low speed functions and on the downstream ports of Hubs,Low Speed Signaling,VSS,One Bit,Time

12、,(1.5Mb/s),Driver,Signal Pins,V,OL,(max),V,OH,(min),Receiver waveforms are the same as on the driver, after including the cable delay,Reset Signaling,Signaled with a long Single-Ended Zero Reset not to be recognized until after 2.5 s Must be recognized by 5.5 s (if device active) Downstream Signalin

13、g only Sent by any downstream hub port Returns device to its default state,Suspend & Resume,Suspend All devices support suspend Enter suspend state after seeing idle bus for 3 ms Suspend current 500 A from bus Resume Devices resume on seeing non-J state USB devices can cause 搑emote wake-up? by signaling with a K-state,Resume Signaling,Function,Function,Hub Port,Other DS,Hub Ports,Hub,Root Port

溫馨提示

  • 1. 本站所有資源如無(wú)特殊說(shuō)明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙,網(wǎng)頁(yè)內(nèi)容里面會(huì)有圖紙預(yù)覽,若沒(méi)有圖紙預(yù)覽就沒(méi)有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 人人文庫(kù)網(wǎng)僅提供信息存儲(chǔ)空間,僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容,請(qǐng)與我們聯(lián)系,我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。

評(píng)論

0/150

提交評(píng)論