• TCA9539-Q1: GPIO processing speed of the TCA9539-Q1 I²C expander IC

  

  DONGYEONG KIM

  TI Thinks Resolved

  Part Number: TCA9539-Q1 Hello, I would like to inquire about the GPIO processing speed of the TCA9539-Q1 I²C expander IC. In this application, the GPIOs will be configured as inputs, and we plan to use 15 pins (excluding one pin) on the TCA9539-Q1…

  • 1 month ago
  • Interface
  • Interface forum

• TCA9539-Q1: TCA9539-Q1: high-frenquency input signal causes interrupt driver error

  

  Mian DENG

  Part Number: TCA9539-Q1 Hi experts, We are developing a custom board based on TDA4APE and we are using TCA9539-Q1 for IO-expansion. The IO-expansion chip is handled by linux driver and the SDK version we are using is SDK11.01. TCA9539-Q1 has an interrupt…

  • 1 month ago
  • Processors
  • Processors forum
Answered

• TCA9539-Q1: Edge monitor issue of TCA9539-Q1 IO expansion chip

  

  Mian DENG

  Resolved

  Part Number: TCA9539-Q1 Hi experts, We are using TCA9539-Q1 for IO expansion on our custom board. The IO expansion chip is handled by linux kernel I2C driver. Currently, I am encountering an issue where changes in the input state of the IO can be detected…

  • Resolved

  • 4 months ago
  • Interface
  • Interface forum

• TCA9539-Q1: TCA9539-Q1

  

  snehal

  TI Thinks Resolved

  Part Number: TCA9539-Q1 Tool/software: Hello TI Team, TCA9539-Q1 with this IO expander, can i use output pins as analog I/O or I can use them as digital I/O only? Regards, Snehal

  • 10 months ago
  • Interface
  • Interface forum

• TCA9539-Q1: What is the original setting means?

  

  Frank QIN

  TI Thinks Resolved

  Part Number: TCA9539-Q1 Hi Team, We are kind of confused on this words in datasheet. 'resetting achieved when the data on port changed to the original setting'. What does the original setting means? the output port default setting or our configuration…

  • 2 months ago
  • Interface
  • Interface forum

• TDA4APE-Q1: Edge monitor issue of TCA9539-Q1 IO expansion chip

  

  Mian DENG

  Answer Suggested

  Part Number: TDA4APE-Q1 Other Parts Discussed in Thread: TCA9539-Q1 , TCA9539 Hi experts, We are developing a custom board based on TDA4APE, and we are using TCA9539-Q1 for IO expansion. The IO expansion chip is handled by linux kernel I2C driver. Currently…

  • 5 months ago
  • Processors
  • Processors forum

• TCA9539-Q1: TCA9539 I2C DATA is pulled low

  

  xiwen Yan

  Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA9539 , Tool/software: Our MCU has two TCA9539s connected to one I2C bus. 500us after operating the one with address 0x74, the I2C DATA line is pulled low probabilistically. The I2C bus recovers…

  • over 1 year ago
  • Interface
  • Interface forum
Answered

• TCA9539-Q1: Need functional safety information

  

  Todd Vanyo

  Resolved

  Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA6408A-Q1 , The device in question is in the Functional Safety-Capable category and I need to request the documentation available for this device. Thanks in advance. Todd

  • Resolved

  • 7 months ago
  • Interface
  • Interface forum
Answered

• TCA9539A-Q1: Drop-in replacement of TCA9539-Q1

  

  Wang Han

  Resolved

  Part Number: TCA9539A-Q1 Hi Expert, Can you help me confirm that TCA9539AQPWRQ1 can drop-in replace TCA9539QPWRQ1 without any software change? Then what's the major difference between these two chips? Thanks, Han

  • Resolved

  • 1 month ago
  • Interface
  • Interface forum

• TCA9539-Q1: TCA9539 output default output state

  

  Scarlett Cao

  TI Thinks Resolved

  Part Number: TCA9539-Q1 Tool/software: Hi team, Customer is using TCA9539-Q1 for output channel expansion. they want to know when TCA9539-Q1 1) nreset pin low and 2) first power up, what the default output state, pull high or low? Thanks Scarle…

  • over 1 year ago
  • Interface
  • Interface forum

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