Part Number: TCA6418E
Hello Sir or Madam.
I'm using the TCA641E as an I2C slave in one of my designs.
There are 2 things I need to know about the GPIO pins for the TCA641E:
According to the datasheet (page 7), the answer to #2 is "At power on, the GPIOs are configured as inputs with internal 50-kΩ pulldown resistors enabled; however, the system master can enable the GPIOs to function as inputs or outputs."
I could not find an answer to #1 on the datasheet, and technical support over the phone did not have an answer to #1.
I need a confirmation to both questions please, as it determines how I setup my schematic (include pullups, pulldowns, nothing at all, etc).
Thank you for your time.
1) The GPIOs before power (VCC=0V) is applied is high-z.
2) The GPIOs are by default pull down to ground by 55k Ohms until programmed. This is assuming Vcc is ON and within the operating range of the device.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to fhoude:
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.