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Messages - DrG

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Character LCDs / Re: NHD-C0220BiZ-FSW-FBW-3V3M I2C SDA glitch and freeze.
« on: November 25, 2016, 09:04:21 AM »
Thanks for illustrating the problem, it is interesting. From the ST7036 data sheet, my two cents...

1. After a follower command a delay of > 200 ms is required for "power stable" (p41).

2) At 3.3v the max I2C clock speed is 300kHz (p54). If I am reading the pics correctly, you are below that, but if you could slow down the I2C I wonder what effect it would have on the glitch.

Not sure that either of these are related to the issue you are experiencing.

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