Ext - OLIMEX MOD-IO User Manual

Open-source hardware uext extension board with relays
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OLIMEX© 2020

5.4 EXT

The EXT connector has 4 pins from the ATMEGA16A's port D – PD4, PD5, PD6 and PD7; it has a VCC
and GND for easier access also.
Pin #
Signal Name
1
PD7
2
PD6
3
PD5
4
PD4
5
3.3V
6
GND
Page 21 of 30
MOD-IO user's manual

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