參數(shù)資料
型號(hào)： GL850A
廠商： Genesys Logic, Inc.
英文描述： USB 2.0 Low-Power HUB Controller
中文描述： 個(gè)USB 2.0低功耗集線器控制器
文件頁(yè)數(shù)： 19/29頁(yè)
文件大?。?/td> 403K
代理商： GL850A
GL850A USB 2.0 Low-Power HUB Controller
2000-2007 Genesys Logic Inc. - All rights reserved.
Page 19
AVDD
(3.3V)
C
R
Vbus
(5V)
RESET#
1.5K ohm
DP0
Inside GL850A
On PCB
33 ohm
R
Figure 5.3 – RESET# (External Reset) setting and application
GL850A internally contains a power on reset circuit. The power on sequence is depicted in the next picture.
To fully control the reset process of GL850A, we suggest the reset time applied in the external reset circuit
should longer than that of the internal reset circuit.
≒
2.7
μ
s
Internal reset
External reset
Power good voltage, 2.5~2.8V
VCC(3.3V)
Figure 5.4 – Power on sequence of GL850A
5.2.2 PGANG/SUSPND Setting
To save pin count, GL850A uses the same pin to decide individual/gang mode as well as to output the
suspend flag. The individual/gang mode is decided within 20us after power on reset. Then, about 50ms later,
this pin is changed to output mode. GL850A outputs the suspend flag once it is globally suspended. For
individual mode, a pull low resister greater than 100K
should be placed. For gang mode, a pull high
resister greater than 100K
should be placed. In figure 5.6, we also depict the suspend LED indicator
schematics. It should be noticed that the polarity of LED must be followed, otherwise the suspend current
will be over spec limitation (2.5mA).
相關(guān)PDF資料
PDF描述
GL850A-MNGXX USB 2.0 Low-Power HUB Controller
GL850A-MNNXX USB 2.0 Low-Power HUB Controller
GL850A-MSGXX USB 2.0 Low-Power HUB Controller
GL850A-MSNXX USB 2.0 Low-Power HUB Controller
GL850G USB 2.0 HUB Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
GL850A-MNGXX 制造商:GENESYS 制造商全稱:GENESYS 功能描述:USB 2.0 Low-Power HUB Controller
GL850A-MNNXX 制造商:GENESYS 制造商全稱:GENESYS 功能描述:USB 2.0 Low-Power HUB Controller
GL850A-MSGXX 制造商:GENESYS 制造商全稱:GENESYS 功能描述:USB 2.0 Low-Power HUB Controller
GL850A-MSNXX 制造商:GENESYS 制造商全稱:GENESYS 功能描述:USB 2.0 Low-Power HUB Controller
GL850G 制造商:GENESYS 制造商全稱:GENESYS 功能描述:USB 2.0 HUB Controller
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