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GPIO firmware controlled pull up or pull down resistors.
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GPIO firmware controlled pull up or pull down resistors.

DCH posted on 10 Nov 2011 2:37 PM PST

1 Forum Post

In the "Digital I/Os" section on page 13 of the CYUSB3014 datasheet there is a statement that the I/O pins can be configured via firmware to be tristated, weak pull up, or pull down.  Does the FX3 support configuring a GPIO pin as an input with a weak pull up?  If so, how would this be done in firmware?




Re: GPIO firmware controlled pull up or pull down resistors.

aasi posted on 16 Nov 2011 09:59 PM PST
Cypress Employee
1073 Forum Posts

The beta version of the SDK does not have APIs to support this. The release version will have support for this configuration.

Regards,

Anand



Re: GPIO firmware controlled pull up or pull down resistors.

Sil posted on 04 Jan 2012 07:00 AM PST
Top Contributor
93 Forum Posts

What is the state of the digital I/O's after hardware reset? Are they tristated or is the internal resistor enabled (pull-up or pull-down)? Thanks.

 

Regards

Silvio



Re: GPIO firmware controlled pull up or pull down resistors.

Sil posted on 05 Jan 2012 02:32 AM PST
Top Contributor
93 Forum Posts

In addition I do not find in the datasheet the maximum output current high and low for GPIO pins. Please let me know.

Regards

Silvio






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