USB-AD-OEM
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Pin Assignement Digital I/O & USB
16 digital Lines can be used as digital in- and outputs (
low
: 0V..0,7V;
high
: 3V..5V). The switch over
happens in groups of 8. The auxiliary voltage is available at pin 17 and 18. Signals are connected via
a 40-way pin connector:
40way pin
conn.
Assignment
1
B1
2
B2
3
B3
4
B4
5
B5
6
B6
7
B7
8
B8
9
A1
10
A2
11
A3
12
A4
13
A5
14
A6
15
A7
16
A8
17
Vext
18
Vext
19
DGND
20
DGND
21 ... 31
--
32
Vusb
33
--
34
D-
35
--
36
D+
37
--
38
DGND
39, 40
--
•
The lines B1 .. B8 are set as output and A1 .. A8 as input in the default state.
•
The digital in- and outputs are protected with 33
W
resistors. An input voltage outside the permitted voltage
range of 0V..5V may damage the device.
•
• The connections Vext provide an auxiliary voltage in the range of 4..5V. This is protected by a fuse (10mA).
•
• A cable available from a computer retailer can be used to connect the USB line. Please check that the
assignment is correct..
B1
B3
B5
B7
A1
A3
A5
A7
Vext
DGND
--
--
--
--
--
--
--
--
--
--
B2
B4
B6
B8
A2
A4
A6
A8
Vext
DGND
--
--
--
--
--
Vusb
D-
D+
DGND
--
