←back to thread

700 points elipsitz | 1 comments | | HN request time: 0s | source
Show context
blackkat ◴[] No.41192280[source]
Some specs here: https://www.digikey.ca/en/product-highlight/r/raspberry-pi/r...

Based on the RP2350, designed by Raspberry Pi in the United Kingdom

Dual Arm M33s at 150 MHz with FPU

520 KiB of SRAM

Robust security features (signed boot, OTP, SHA-256, TRNG, glitch detectors and Arm TrustZone for Cortex®-M)

Optional, dual RISC-V Hazard3 CPUs at 150 MHz

Low-power operation

PIO v2 with 3 × programmable I/O co-processors (12 × programmable I/O state machines) for custom peripheral support

Support for PSRAM, faster off-chip XIP QSPI Flash interface

4 MB on-board QSPI Flash storage

5 V tolerant GPIOs

Open source C/C++ SDK, MicroPython support

Software-compatible with Pico 1/RP2040

Drag-and-drop programming using mass storage over USB

Castellated module allows soldering directly to carrier boards

Footprint- and pin-compatible with Pico 1 (21 mm × 51 mm form factor)

26 multifunction GPIO pins, including three analog inputs

Operating temperature: -20°C to +85°C

Supported input voltage: 1.8 VDC to 5.5 VDC

replies(5): >>41192318 #>>41192351 #>>41193287 #>>41194312 #>>41194963 #
coder543 ◴[] No.41194312[source]
I'm having trouble seeing where the datasheet actually says the GPIO pins are 5V tolerant.

EDIT: okay, section 14.8.2.1 mentions two types of digital pins: "Standard Digital" and "Fault Tolerant Digital", and the FT Digital pins might be 5V tolerant, it looks like.

replies(1): >>41194419 #
sowbug ◴[] No.41194419[source]
Page 13: "GPIOs are 5 V-tolerant (powered), and 3.3 V-failsafe (unpowered)"
replies(1): >>41194445 #
1. coder543 ◴[] No.41194445[source]
Yep, I edited a few minutes ago to mention a reference I found in the datasheet. It's cool, but the reality seems a little more nuanced than that quote would indicate, since that only appears to work for GPIO-only pins, not just pins being used as GPIO. (So, if a pin supports analog input, for example, it will not be 5V tolerant.)