Search tips
Showing 107 results View by: Thread Post Sort by

  • EVMK2G: I2C_transfer fail , slave device PCA9555, device 0x20,Data Transfer failed with transfer status 259

    Part Number: EVMK2G #define I2C_EXP_INSTANCE 1 #define I2C_EXPIO_ADDR 0x20 /********************************************************************** ************************** Macros ************************************ ********************************…

  • PCA9555: How to config I/O port as input or out

    TI Thinks Resolved
    Part Number: PCA9555 Hi, I checked datasheet and found the device I/O port can be programmed as input or output port. Could you please help to check if I can follow below table to set I/O port? How to do that and what's the command? And please help…

  • PCA9555: what's the difference between PCA9555 and PCA9548A

    TI Thinks Resolved
    Part Number: PCA9555 Other Parts Discussed in Thread: PCA9548A Hi, what's the difference between PCA9555 and PCA9548A? I can't find the datasheet of PCA9548A from ti.com. Does PCA9548A cover all specs of PCA9555 and replace it? You can also contact…
    • Answered

  • TCA9555: Rolling over from PCA9555 to TCA9555

    Resolved
    Part Number: TCA9555 Other Parts Discussed in Thread: PCA9555 , Hi Team, Can you provide a rollover guide from a competitor PCA9555 to our TCA9555? Please cover both the hardware and software changes required. Thanks. Roy
    • Resolved

  • PCA9555: Specific Application Question

    TI Thinks Resolved
    Part Number: PCA9555 Other Parts Discussed in Thread: TCA9555 Team, We are planning to use the PCA9555 with Vcc=3.3v and 5V in the I/O lines. Are we going to have any issues with it? Thank you.

  • RE: TCA9535: PCA9555 IO Configuration issue in Output Mode

    Hi Gonugunta, Are you still experiencing the I/O pulse when writing to TCA9535's output register? If you were able to find a solution, we would like to document it here if possible. Regards, Eric

  • PCA9555: Output Inversion

    TI Thinks Resolved
    Part Number: PCA9555 Other Parts Discussed in Thread: TCA9555 Hi E2E, 1. Could you kindly let us know PCA9555 output can be inverted by hardware method? 2. Did we just only set reg 0x04 and 0x05 to inverted the output? Thnaks!

  • PCA9555: Is it output open drain?

    TI Thinks Resolved
    Part Number: PCA9555 Hi Sir, I plan to use PCA9555 as an smbus expander as an output signal to trigger high active, but I didn't have external pull up resistor in I/O pin, Is it suitable for PCA9555? Thanks
    • Answered

  • PCA9555: I2C not working

    Resolved
    Part Number: PCA9555 Other Parts Discussed in Thread: TCA9555 Hi, I am trying to establish communication with PCA9555 io-expander chip via I2C, I am receiving NAK and my controller stops communication as expected. I even changed the chip with assumption…
    • Resolved
    • Answered

  • PCA9555: Ask for datasheet contents of GPIO expander

    Resolved
    Part Number: PCA9555 When input data differ from input register state, PCA9555 will trigger the interrupt signal to I2C master, right? In case I2C master connected eight devices of PCA9555, all of I/O port connected to individual DUT. Could the I2C m…
    • Resolved

Didn't find what you are looking for? Post a new question.