參數(shù)資料
型號(hào): USB20H04-JT
廠(chǎng)商: STANDARD MICROSYSTEMS CORP
元件分類(lèi): 總線(xiàn)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(yè)數(shù): 28/38頁(yè)
文件大?。?/td> 919K
代理商: USB20H04-JT
4-Port USB2.0 Hub Controller
Datasheet
Revision 1.63 (10-14-04)
Page 28
SMSC USB20H04
DATASHEET
8.4.1.1
SMBus Configuration Timing
Figure 8.3 - Timing for Configuration from SMBus
Table 8.7 - Time Values to Configure from SMBus
NAME
T1
T2
DESCRIPTION
MIN
100
16
TYP
MAX
32
UNITS
nsec
nsec
RESET_N asserted
USB20H04 recovery/stabilization – until first
external SCK/SCL activity
Implementation dependent load time
Configuration finished to Hub enabled
T3
T4
35
70
nsec
RESET_N
t1
t2
t3
GND
Hardware
Reset Asserted
CS/EE_SEL
& SMB_SEL_N
strapping
options read
First External
SCK/SCL
Activity
Configuration
Finished
SCK/SCL
t4
Hub Function
Enable
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