Pumpkin Motherboard Module (MBM) 2 Rev. F
Pumpkin, Inc.
A motherboard module designed to interface a BeagleBone Black (BBB) processor with a CubeSat Kit (CSK) bus, providing various I/O options and power management.
Typed specifications49 values
Discloses 6 of 13 fields engineers filter by in this category (category median 5).
- Processor
- Hosts BeagleBone Black (BBB) Rev C single-board computer and compatible variants datasheet p.3
- Mass
- 34 g datasheet p.8
- CPU clock
- 32.77 MHz product page 400 MHz
- Envelope (L×W×H)
- 96 mm x 90 mm x 11 mm datasheet p.8
- Operating system
- Linux datasheet p.2 Linux custom Linux-based image on BBB
- Supply voltage
- -0.3–6 V product page -0.3–6 V | -0.3–3.6 V | -0.3–3.6 V | 3–3.5 V
- Data interface
- Ethernet datasheet p.2 I2C 1x I2C on CSK Bus Connector | SPI 1x SPI on CSK Bus Connector | UART 4.5x UART on CSK Bus Connector | GPIO 6x GPIO on CSK Bus Connector +11
- Operating temperature
- -40–85 °C absolute maximum ratings, TA · datasheet p.8
- Board format
- CubeSat Kit bus 104-pin CubeSat Kit Bus, stackable · datasheet p.1 PC/104 PC/104-size footprint | PC/104
- Flight software support
- Pumpkin FSW SupMCU service (Rust) on custom Linux image with systemd; Python 3.10.9 and Perl 5.34 pre-installed; GraphQL endpoint datasheet p.3 Linux-based image | Python | Perl
- Radiation and fault mitigation
- latch-up protection (current limiting) independent latchup (device overcurrent) protection on critic… · datasheet p.1 hardware watchdog on-board -RESET & OFF_VCC-driven WDT interface; external watc… | hardware watchdog
- Connector
- 104-pin CubeSat Kit Bus connectors H1/H2 (stackthrough or non-stackthrough); Omnetics BiLobe 25-pin PHY connector J263; 6-pin Hirose DF13 J133; 4-pin FPC J132 datasheet p.6
- Satellite class
- CubeSat CubeSat nanosatellites · datasheet p.1 CubeSat | nanosat 1-10 kg
- GPIO lines
- 5 on 6-pin DF13 connector J133 · datasheet p.1 6 on CSK Bus Connector | 5 | 5
- Data interface speed
- 20 Mbps RS422/RS485 PHY, TI SN65HVD73 transceivers · datasheet p.6
- Analog inputs
- 7 analog input 0-1.8 Vdc on CSK Bus Connector · datasheet p.1
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier24 lines, in the manufacturer's own wording
- Operating temperature
- -40 to +85 ºC
- Voltage on +5v_usb bus
- -0.3 to +6 V
- Voltage on +5v_sys bus
- -0.3 to +6 V
- Voltage on vcc_sys bus
- -0.3 to +3.6 V
- Voltage on local vcc bus
- -0.3 to +3.6 V
- Height of components above PCB
- 11 mm
- Height of components below PCB
- 3.5 mm
- PCB width
- 96 mm
- PCB length
- 90 mm
- PCB thickness
- 1.6 mm
- CUBESAT kit bus connector terminal pitch
- 2.54 mm
- Maximum external DC voltage on +5v_sys or to p1 on bbb
- 6.0 V
- Backup battery voltage
- 3.0-3.5 V
- Operating current (without BBB)
- 10 mA
- Operating current (with BBB, Ethernet disabled)
- 300 mA
- Operating current (with BBB, Ethernet enabled)
- 350 mA
- Rtc crystal frequency
- 32.768 ± 0.001 kHz
- Overcurrent trip point for vdd_5v
- 920 mA
- Overcurrent trip point for vdd_phy
- 920 mA
- Overcurrent trip point for +5v_usb
- 750 mA
- Data rate through any on-board isolator (U1-U3)
- 50 MHz
- I2C addresses available to slave devices
- 0x04-0x7F
- I2C clock speed
- 400 kHz
- I2C pull-up resistors
- 1.5k Ω
About
The Motherboard Module (MBM) 2 Rev. F is an interface board that connects a BeagleBone Black (BBB) processor to a CubeSat Kit (CSK) bus. It provides I/O isolation for digital I/O signals and manages power for the BBB. The module features various configurable interfaces, including RS422 with TI SN65HVD73 transceivers (20Mbps) supporting UART and SPI-over-RS422 configurations, LVTTL single-ended UARTs (UART0 and UART2), and I2C signals. It also includes a 6-pin Hirose DF13 right-angle header (J133) for five BBB GPIO signals, actively isolated and +5V-tolerant, and a 4-pin FPC connector (J132) for the BBB’s UART0 serial port, used for boot control and debug. The MBM2 operates from a +5Vdc system power supply (+5V_SYS) and provides +3.3V logic levels for BBB I/O. It includes an external watchdog timer (WDT) interface and offers unidirectional signals and power-on sequencing/protection between the BBB and the CSK bus connector on a per-GPIO-pin basis. The PCB features a corner hole pattern matching PC/104.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.