SCPA070 june   2023 TCAL6408 , TCAL6416 , TCAL9538 , TCAL9539 , TCAL9539-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Programmable Output Drive Strength
  6. 3 Programmable Pull-Up or Pull-Down Resistors
  7. 4 Latchable Inputs
  8. 5 Maskable Interrupt
  9. 6 Interrupt Status Register
  10. 7 Programmable Open-Drain and Push-Pull Outputs
  11. 8 Benefits of Using TCAL I/O Expanders Versus TCA I/O Expanders
  12. 9 Summary
  13. 10References

3 Programmable Pull-Up or Pull-Down Resistors

Agile I/O’s offer programmable internal pull-up or pull-down resistors accessed by register addressing. The user has the ability to internally connect a weak pull-up or pull-down resistor (approximately 100 kΩ) onto the p-port pad. Figure 3-1 is a functional diagram that shows the internal connection and control block for programmable pull-up or pull-down resistors. Pull-up or pull-down resistors are disabled when the p-port is configured as an output.

GUID-20230601-SS0I-2PQM-MHW9-HD1KPDCK9SVD-low.svg Figure 3-1 Pull-Up or Pull-Down Control Path to P-Ports