Datasheet

Name Number Type Power Domain Reset State Description
GPIO16 27 Digital IO (FT) IOVDD Pull-Down User IO
GPIO17 28 Digital IO (FT) IOVDD Pull-Down User IO
GPIO18 29 Digital IO (FT) IOVDD Pull-Down User IO
GPIO19 30 Digital IO (FT) IOVDD Pull-Down User IO
GPIO20 31 Digital IO (FT) IOVDD Pull-Down User IO
GPIO21 32 Digital IO (FT) IOVDD Pull-Down User IO
GPIO22 34 Digital IO (FT) IOVDD Pull-Down User IO
GPIO23 35 Digital IO (FT) IOVDD Pull-Down User IO
GPIO24 36 Digital IO (FT) IOVDD Pull-Down User IO
GPIO25 37 Digital IO (FT) IOVDD Pull-Down User IO
GPIO26 / ADC0 38 Digital IO /
Analogue
IOVDD /
ADC_IOVDD
Pull-Down User IO or ADC
input
GPIO27 / ADC1 39 Digital IO /
Analogue
IOVDD /
ADC_IOVDD
Pull-Down User IO or ADC
input
GPIO28 / ADC2 40 Digital IO /
Analogue
IOVDD /
ADC_IOVDD
Pull-Down User IO or ADC
input
GPIO29 / ADC3 41 Digital IO /
Analogue
IOVDD /
ADC_IOVDD
Pull-Down User IO or ADC
input
Table 639. QSPI pins
Name Number Type Power Domain Reset State Description
QSPI_SD3 51 Digital IO IOVDD QSPI data
QSPI_SCLK 52 Digital IO IOVDD Pull-Down QSPI clock
QSPI_SD0 53 Digital IO IOVDD QSPI data
QSPI_SD2 54 Digital IO IOVDD QSPI data
QSPI_SD1 55 Digital IO IOVDD QSPI data
QSPI_CSn 56 Digital IO IOVDD Pull-Up QSPI chip select
Table 640. Crystal
oscillator pins
Name Number Type Power Domain Description
XIN 20 Analogue (XOSC) IOVDD Crystal oscilator
differential signal. XIN
may also be driven by
a square wave.
XOUT 21 Analogue (XOSC) IOVDD Crystal oscilator
differential signal.
RP2040 Datasheet
5.2. Pinout 631