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GL850 Datasheet(PDF) 14 Page - List of Unclassifed Manufacturers

Part # GL850
Description  USB 2.0 4-PORT HUB Controller
PDF  40 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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GL850 Datasheet(HTML) 14 Page - List of Unclassifed Manufacturers

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GL850 USB 2.0 4-Port HUB Controller
©2000-2003 Genesys Logic Inc.—All rights reserved.
Page 14
Clock and Reset Interface
Pin#
Pin Name
Type
Description
20
XTAL1
I
12MHz crystal clock input.
21
XTAL2
O
12MHz crystal clock output.
38
RESET#
I
Active low. External reset input, default pull high 100KΩ.
When RESET# = low, whole chip is reset to the initial state.
System Interface
Pin#
Pin Name
Type
Description
39
TEST
I
(pd)
0: Normal operation.
1: Chip will be put in test mode.
Power / Ground
Pin#
Pin Name
Type
Description
11,18,
22,28,
63,64
AVDD
P
Analog power input for analog circuits.
1,12,19,
23,29,
62
AGND
P
Analog ground input for analog circuits.
37,47,
52,59
DVDD
P
Digital power input for digital circuits.
36,46,
51,58
DGND
P
Digital ground input for digital circuits.
Note: Analog circuits are quite sensitive to power and ground noise. PCB layout must
take care the power routing and the ground plane. For detailed information, please refer to
GL850 Design Guideline.
Notation:
Type
O
Output
I
Input
B
Bi-directional
B/I
Bi-directional, default input
B/O
Bi-directional, default output
P
Power / Ground
A
Analog
SO
Automatic output low when suspend
pu
Internal pull up
pd
Internal pull down
odpu
Open drain with internal pull up



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