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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.
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