Reuse of MISO (X0D00)
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jmag99
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Reuse of MISO (X0D00)
I am attempting to re-use the MISO pin on a XS1-U8A-64. I am using as an I2C SCL pin with a 10K pull-up on it. When I drive the line low, it only gets to 2V. I measured with a meter that the line has 10K to 3.3V. It appears to be open to GND. I am using the I2C_Simple module. Any idea why this might be?
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jmag99
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Also, I should add that SDA goes low properly and is on one of the other SPI lines (reused after bootup). This line also has a 10K resistor. I am trying to determine what is different.
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stdefeber
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Did you check the specific port properties ?
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Ross
Verified - XCore Legend
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Is the SPI device driving against it? (is SS high?)
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jmag99
- Active Member
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- Joined: Tue Jul 20, 2010 9:45 pm
Thanks, that was it. I assumed it would be left as an input with the pull-up causing it to keep SS high, but that was not the case for some reason.