Hi everyone,
I’m currently working on a project with the Pico W, and I’m trying to determine the maximum SPI read speed with PIO I can achieve while communicating with the CYW43439 chip. I’ve noticed there’s a 470-ohm series resistor on GP24 (used for SPI communication), which effectively creates an RC filter.
To calculate the RC time constant and assess how it might limit my maximum read speed, I need to know the load capacitance of the RP2040 pins. I couldn’t find this value in the datasheet.
Does anyone know the typical load capacitance of the GPIO pins on the RP2040? Or has anyone tested the SPI performance in a similar setup with the CYW43439?
Thanks for your help!
I’m currently working on a project with the Pico W, and I’m trying to determine the maximum SPI read speed with PIO I can achieve while communicating with the CYW43439 chip. I’ve noticed there’s a 470-ohm series resistor on GP24 (used for SPI communication), which effectively creates an RC filter.
To calculate the RC time constant and assess how it might limit my maximum read speed, I need to know the load capacitance of the RP2040 pins. I couldn’t find this value in the datasheet.
Does anyone know the typical load capacitance of the GPIO pins on the RP2040? Or has anyone tested the SPI performance in a similar setup with the CYW43439?
Thanks for your help!
Statistics: Posted by totolr — Fri Nov 29, 2024 9:05 am — Replies 0 — Views 15