Relay board - I2C frequency

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smanning_123
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Joined:Fri Sep 18, 2015 12:27 am
Relay board - I2C frequency

Post by smanning_123 » Fri Sep 18, 2015 12:30 am

Whats the I2C frequency of the 8 channel relay board (shield)...
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andrew
Freetronics Staff
Freetronics Staff
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Joined:Sun Jul 14, 2013 7:06 am

Re: Relay board - I2C frequency

Post by andrew » Fri Sep 18, 2015 5:39 am

The RELAY8 uses an MCP23017:
http://ww1.microchip.com/downloads/en/D ... 21952b.pdf
... whose I2C bus can operate at 100 kHz, 400 kHz and theoretically 1.7 MHz.
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