- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383985 > USB20H04-JT (STANDARD MICROSYSTEMS CORP) 4-PORT USB2.0 HUB CONTROLLER PDF資料下載
參數(shù)資料
| 型號： | USB20H04-JT |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 總線控制器 |
| 英文描述： | 4-PORT USB2.0 HUB CONTROLLER |
| 中文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, 1.40 MM THICKNESS, LEAD FREE, TQFP-64 |
| 文件頁數(shù)： | 20/38頁 |
| 文件大小： | 919K |
| 代理商： | USB20H04-JT |
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頁當(dāng)前第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第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
4-Port USB2.0 Hub Controller
Datasheet
Revision 1.63 (10-14-04)
Page 20
SMSC USB20H04
DATASHEET
7.5
Serial Interface
External configuration data is loaded via the serial interface. The serial interface appears as either an
SMBus slave, or an I
C memory interface.
7.5.1
SMBus Slave
The USB20H04 conforms to voltage, power, and timing specifications as set forth in the SMBus 1.0
Specification for Slave-Only devices. The SMBus interface shares the same pins as the EEPROM
interface. If the SMB_SEL_N pin is configured to activate the SMBus interface, external EEPROM support
is no longer available and the user-defined configuration values must be downloaded via the SMBus. A
Application Note 9.29, "USB20H04 4-Port USB2.0 Hub Controller - Configuration Programming"provides details for configuring the USB20H04 via the SMBus.
7.5.2
I
2
C Memory Interface
A basic I
2
C-bus interface is provided for reading configuration data from an external EEPROM following a
reset. The USB20H04 acts as the master and generates the serial clock and the START and STOP
conditions.
7.6
Repeater
The hub repeater is responsible for managing connectivity between upstream and downstream facing ports
which are operating at the same speed. The repeater includes both a high-speed repeater function and a
full-/low-speed repeater function. When the upstream port is operating in a high-speed environment, traffic
passes through the high-speed repeater to downstream ports that are operating at high-speed. As detailed
in the USB specification, the repeater is responsible for managing connectivity on a ‘per packet’ basis. It
implements ‘packet signaling’ and ‘resume’ connectivity. If a low-speed device is detected the repeater will
not propagate upstream packets to the corresponding port, unless they are preceded by a PREAMBLE
PID.
7.7
SIE
Communication with the host is handled by the SIE. The full USB protocol layer is implemented in the SIE,
including Endpoint 0 and Endpoint 1. All standard USB requests from the host are handled by the
hardware without the need for firmware intervention.
7.8
Controller
The controller implements protocol handling at a higher level. By responding to SETUP packets it
coordinates enumeration, and it manages suspend/resume operation.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| USB20H04 | 4-PORT USB2.0 HUB CONTROLLER |
| USB2223-03 | BUS POWERED USB 2.0 FLASH MEDIA CONTROLLER |
| USB2223-NE-03 | BUS POWERED USB 2.0 FLASH MEDIA CONTROLLER |
| USB2223-NU-03 | BUS POWERED USB 2.0 FLASH MEDIA CONTROLLER |
| USB2229 | 5TH GENERATION HI-SPEED USB FLASH MEDIA & IrDA CONTROLLER WITH INTEGRATED CARD POWER FETs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| USB20H04-JT-E6 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| USB20X2GY | 制造商:Hubbell Wiring Device-Kellems 功能描述:Hubbell USB20X2GY NEMA 5-15R AC Duplex Receptacle w/2USB Ports - Gray 20 amp 制造商:Hubbell Wiring Device-Kellems 功能描述:USB CHARGER RECEPTACLE, 20A, 125VAC, GREY; Connector Type:Electrical AC Receptacle, USB Charger; Series:-; Current Rating:20A; Connector Color:Grey; Connector Body Material:-; Voltage Rating VAC:125V |
| USB20X2I | 制造商:Hubbell Wiring Device-Kellems 功能描述:Hubbell USB20X2I NEMA 5-15R AC Duplex Receptacle w/2USB Ports - Ivory 20 amp 制造商:Hubbell Premise Wiring 功能描述:USB CHARGER RECEPTACLE 20A 1 制造商:Hubbell Wiring Device-Kellems 功能描述:USB CHARGER RECEPTACLE, 20A, 125VAC, IVO 制造商:Hubbell Wiring Device-Kellems 功能描述:USB CHARGER RECEPTACLE, 20A, 125VAC, IVORY; Connector Type:Electrical AC Receptacle, USB Charger; Series:-; Current Rating:20A; Connector Color:Ivory; Connector Body Material:-; Voltage Rating VAC:125V |
| USB20X2LA | 制造商:Hubbell Wiring Device-Kellems 功能描述:Hubbell USB20X2LA NEMA 5-15R AC Duplex Receptacle w/2USB Ports - Light Almond 20 |
| USB20X2W | 制造商:Hubbell Wiring Device-Kellems 功能描述:Hubbell USB20X2W NEMA 5-15R AC Duplex Receptacle w/2USB Ports - White 20 amp 制造商:Hubbell Premise Wiring 功能描述:USB CHARGER RECEPTACLE 20A 1 制造商:Hubbell Wiring Device-Kellems 功能描述:USB CHARGER RECEPTACLE, 20A, 125VAC, WHI 制造商:Hubbell Wiring Device-Kellems 功能描述:USB CHARGER RECEPTACLE, 20A, 125VAC, WHITE; Connector Type:Electrical AC Receptacle, USB Charger; Series:-; Current Rating:20A; Connector Color:White; Connector Body Material:-; Voltage Rating VAC:125V |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。