RP2350A Development Board

New Product Launch

The Hellbender Raspberry Pi RP2350 development board is designed to be a general purpose microcontroller and sensor board ready to be integrated into any project.

Key features include flat back, 46-pin castellated IO headers, USB type C, SWD, µSD card, LiPo battery power and charging, integrated RTC, IMU, Temperature, Pressure, Relative Humidity, and QWIIC connector support. This board is supported through the Raspberry Pi PICO SDK .

This board is produced onsite at our Pittsburgh, PA facility.

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Specifications

PCB Interface 2x 23pin castellated edge connectors
Power USB-C 5V
Battery 2S to 4S (jumper select), 10k NTC thermistor support
USB 1x USB 2.0 debug port via USB-C connector
Debug / Serial 2 I2C channels accessible via QWIIC connector
3-pin JST SWD debug connector
Radio 3x Standoffs around 12pin JST (0533071271) for expansion LoRa module
3V3, GND, SPI, 4x GPIOs
Miscellaneous 128Mbit flash memory
2x tri-color LEDs addressable by I2C
RTC
6-axis IMU (3-axis accelerometer, 3 axis gyroscope), 20,000g shock tolerant
Temperature, Pressure, & Relative Humidity
SD card slot
U.FL connector to the crystal oscillator
Environment Recommended operating temperature -20 to 80° C

Block Diagram

Pin Map Table

Line RP2350A Pin Fn PICO SDK Default Fn for that GPIO Hb RP2350 Dev Board Pin Hb Silk Screen Hb Net Name
1 13 GPIO9 J3-1 9 SPI CD CS
2 09 GPIO6 J3-2 6 SPI SCLK
3 10 GPIO7 J3-3 7 SPI MOSI
4 14 GPIO10 J3-4 10 LORA IO1
5 15 GPIO11 J3-5 11 LORA IO3
6 03 GPIO1 J3-6 1 IMU INT1
7 12 GPIO8 J3-7 8 BAT INT
8 J3-8 GND GND
9 08 GPIO5 I2C0 SCL0 J3-9 5 SCL0
10 07 GPIO4 I2C0 SDA0 J3-10 4 SDA0
11 05 GPIO3 I2C SCL1 J3-11 3 SCL1
12 05 GPIO2 I2C SDA1 J3-12 2 SDA1
13 02 GPIO0 J3-13 0 XIP CS1n
14 56 QSPI CLK J3-14 SCLK QSPI SCLK
15 55 QSPI SD3 J3-15 SD3 QSPI SD3
16 58 QSPI SD2 J3-16 SD2 QSPI SD2
17 59 QSPI SD1 J3-17 SD1 QSPI SD1
18 57 QSPI SD0 J3-18 SD0 QSPI SD0
19 NA J3-19 SNK FUSB SNK
20 NA J3-20 SRC FUSB SRC
21 NA J3-21 GND GND
22 NA J3-22 3V3 3V3
23 NA J3-23 VBAT+ VBAT+
24 NA J4-1 VBUS VBUS
25 NA J4-2 VSYS VSYS
26 NA J4-3 3V3 3V3
27 NA J4-4 GND GND
28 NA J4-5 ORNT FUSB ORIENT
29 37 GPIO25 J4-6 29 USB INT
30 40 GPIO26 / ADC0 J4-7 26 ADC0
31 41 GPIO27 / ADC1 J4-8 27 ADC1
32 43 GPIO29 / ADC3 J4-9 252 LORA nREST
33 36 GPIO24 J4-10 24 LORA BUSY
34 33 GPIO21 J4-11 222 SPI LORA CS
35 32 GPIO20 J4-12 232 SPI MISO
36 35 GPIO23 J4-13 212 CLK GPOUT1
37 34 GPIO22 J4-14 202 CLK GPIN1
38 31 GPIO19 SPI0 TX / MOSI J4-15 19 HSTX8
39 29 GPIO18 SPI0 SCLK J4-16 18 HSTX7
40 28 GPIO17 SPI0 CS J4-17 17 HSTX6
41 27 GPIO16 SPI0 RX / MISO J4-18 16 HSTX5
42 19 GPIO15 J4-19 15 HSTX4
43 18 GPIO14 J4-20 14 HSTX3
44 17 GPIO13 J4-21 13 HSTX2
45 16 GPIO12 J4-22 12 HSTX1
46 42 GPIO28 / ADC2 J4-23 28 ADC2

Dimensional Drawing

Operation Notes

WARNINGS

  • This product should only be connected to an external power supply rated for USB-C.
  • The RTC has no on-board battery backup, if backup is desired an external battery must be added.
  • This product should be operated in a well-ventilated environment, and if used inside a case, the case should have appropriate cooling capabilities or else not be sealed.
  • This product should be placed on a non-conductive surface in use and should not be contacted by conductive items.
  • The connection of incompatible devices to the various connectors may affect compliance and result in damage to the unit and invalidate the warranty.
  • All peripherals used with this product should comply with relevant standards for the country of use and be marked accordingly to ensure that safety and performance requirements are met.

SAFETY INSTRUCTIONS

To avoid malfunction or damage to this product please observe the following:

  • Do not expose to water, moisture, or place on a conductive surface while in operation.
  • Avoid mechanical or electrical damage to the printed circuit board and connectors.
  • Avoid handling the printed circuit board while powered and only handle the edges to minimize the risk of ESD.

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