- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi Cypress
Do you have FX3 GPIO status table in Reset period for reference , Thank !!
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello,
Please refer to section 11 Default State of I/Os During Boot of the app note AN76405 from the following link: https://www.cypress.com/file/201991/download
Regards,
Yashwant
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello,
Please refer to section 11 Default State of I/Os During Boot of the app note AN76405 from the following link: https://www.cypress.com/file/201991/download
Regards,
Yashwant
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi Cypress
Base on GPIO54 in I2C Boot default is Tristate status but tristate is three state ( H or L or Z ) . How can I know the status ( H or L or Z ) in Reset period .
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello,
A pin status is tristated and there no external pull-up/pull-down, it would have an undefined voltage with a random value because of some stray voltages due to noise, EMI or static charges.
So, if the pin has a voltage other than the Low(L) and High(H) voltages, that pin can be referred to as a tristated pin.
Regards,
Yashwant
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi Yashwant
Thank for you kind reply , Base on "I2C Boot default mode" , Is it right for example as below :
GPIO54 had pull high resistor then output is high in reset period .
GPIO54 had pull low resistor then output is low in reset period .
GPIO54 don't had pull high or pull low resistor then is random in reset period .
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello,
Yes, your understanding is correct.
If the GPIO is pulled-up, the voltage on that pin will be HIGH and if the GPIO is pulled-down, the voltage will be LOW.
If there are no pull-up/pull-down resistors, then the voltage is some random value.
Regards,
Yashwant