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GL640 Datasheet(PDF) 6 Page - List of Unclassifed Manufacturers

Part # GL640
Description  IEEE-1284 to USB Bridge
PDF  39 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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GL640 Datasheet(HTML) 6 Page - List of Unclassifed Manufacturers

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Revision 1.1
Jun. 7, 1999
-5-
GL640USB, GL640USB-A
5
5.. Pin Descriptions
GL640USB
Pin No.
GL640USB-A
Pin No.
SYMBOL I/O
DESCRIPTION
1
43
CLKOUT
O Clock output to external device
The clock frequency is selected by setting DEVCTL register.
2
45
HRST
I
High active hardware reset, internal pull low
With internal power-on reset circuit, this pin can be left unconnected or
pulled low.
3
47
WR#
O This active low signal indicates the EPP write operation.
4
48
WAIT#
I
this signal acts as the acknowledge from external EPP device, internal
pull up
5-8
1-4
D0-D3
I/O Address/Data bus bit 0 to bit 3
9
5
DVCC
-
Digital 5V input
10
6
DGND
-
Digital ground
11-14
7-10
D4-D7
I/O Address/Data bus bit 4 to bit 7
15
11
VCP
-
3.3 V output. This output voltage is used to pull up D+ line to indicate
the full-speed device.
16
12
D+
I/O USB differential data
17
13
D-
I/O USB differential data
18
14
AVCC
-
Analog 5V input
19
16
AGND
-
Analog ground
20
17
GPI1
I
General purpose input 1
21
20
GPI2
I
General purpose input 2
22
21
GPI3
I
General purpose input 3
23
22
X2
I/O Crystal output
24
24
X1
I
12/48 MHz crystal or external clock input
25
25
OSCSEL
I
Oscillator Select, internal pull down
0=12MHz
1=48MHz
26
26
GPI4
I
General purpose input 4, internal pull up



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