Regarding 5v tolerance and the RP2350B, are GPIO pins 40-47 (ADC0-7) 5v tolerant when not in analog mode?
My current (RP2040) project uses digital pins 0-7 and reads a vintage computer's 16 bit address lines in 2 stages via a couple of 74LVC245s, then reads/writes to the computer's 8 data lines via a third 74LVC245. If the RP2350B can handle 74LS ~5v logic levels on all the 16 new high GPIOs then I could make a much cheaper board by removing all the 74LVC chips and the 74HC138 address selector chip.
I seem to recall reading somewhere, not to use 5v on the ADC pins of the R2040. Follow-up question: Was that only when in analog mode too, for the RP2040 chip?
My current (RP2040) project uses digital pins 0-7 and reads a vintage computer's 16 bit address lines in 2 stages via a couple of 74LVC245s, then reads/writes to the computer's 8 data lines via a third 74LVC245. If the RP2350B can handle 74LS ~5v logic levels on all the 16 new high GPIOs then I could make a much cheaper board by removing all the 74LVC chips and the 74HC138 address selector chip.
I seem to recall reading somewhere, not to use 5v on the ADC pins of the R2040. Follow-up question: Was that only when in analog mode too, for the RP2040 chip?
Statistics: Posted by XZCE — Thu Dec 25, 2025 1:03 am