A General-Purpose I/O - EEG HD1490 Product Manual

A General-Purpose I/O

BP121 Back Panel
Each of the 2 GPIO banks, Bank A and Bank B, has the following pinout:
Bank A provides GPIO 1-4:
Bank B provides GPIO 5-8:
If a given GPIO is configured as an input (GPI), it is activated when
closed (connected to ground), and inactive when open (left floating).
The even-numbered pin in a given GPI pair is its ground. For example,
if GPIO 1 were configured as an input (GPI), you could activate it by
connecting pins 1 and 2 of Bank A, thereby grounding pin 1. If pin 1
were left floating, GPI A would be inactive.
If a given GPIO is configured as an output (GPO), its pins form a switch
that is on when closed and off when open. For example, if GPIO 5 were
configured as an output, pins 1 and 2 of Bank B would form a switch that
were closed when GPO 5 were active, and open when it were inactive.
HD1490 HD Encoder Frame Card
7 8
5 6
3 4
1 2
GPIO Pins
4 (D) 7, 8
3 (C) 5, 6
2 (B) 3, 4
1 (A) 1, 2
GPIO Pins
8 (H) 7, 8
7 (G) 5, 6
6 (F) 3, 4
5 (E) 1, 2
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