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參數(shù)資料
| 型號(hào)： | USB20H04-JD |
| 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, TQFP-64 |
| 文件頁(yè)數(shù)： | 23/38頁(yè) |
| 文件大?。?/td> | 919K |
| 代理商： | USB20H04-JD |
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4-Port USB2.0 Controller
Datasheet
SMSC USB20H04
Page 23
Revision 1.63 (10-14-04)
DATASHEET
Chapter 8
Implementation Notes
The following sections consist of select functional explanations to aid in implementing the Hub Controller
into a system.
8.1
Configuration Implementations
The USB20H04 is normally configured by an external EEPROM connected directly to the serial interface.
Typical circuit diagrams are shown below. For a more detailed discussion of the serial interface, including
Application Note 9.29, "USB20H04 4-Port USB2.0 Hub Controller, Configuration Programming"
a Hub system that supports In Circuit Programming of the EEPROM. 8.1.1
Interfacing a 2-wire Serial EEPROM
The I
2
C EEPROM interface is designed to attach to a single “dedicated” I
2
C EEPROM. It conforms to the
Standard-mode I
C Specification (100kbit/s transfer rate and 7-bit addressing) for protocol and electrical
compatibility. The circuit board designer is required to place external pull-up resistors (10K ohm
recommended) on the SDA & SCL lines (per SMBus 1.0 Specification, and EEPROM manufacturer
guidelines) to VDD in order to assure proper operation.
Figure 8.1 - 2-Wire EEPROM Interface
USB20H04
SCK/SCL
SD/SDA
24C02A
SCL
SDA
VDD3.3
VDD3.3
SMB_SEL_N
CS/EE_SEL
1k
10k 10k
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| USB20H04-JT | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
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| 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 |
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