HARDWARE / PRODUCTAdded 10 Jul 2026

Pluggable Socketed Processor Module B (PSPM B)

Pumpkin, Inc.
Pluggable Socketed Processor Module B (PSPM B)

A socketed development version of Pumpkin's C&DH processor module built around Silicon Labs' C8051F120 8-bit MCU, for use with the CubeSat-compatible Development Board (DB).

Typed specifications39 values

Discloses 9 of 13 fields engineers filter by in this category (category median 5).

Processor
Silicon Labs® C8051F120 8-bit microcontroller (MCU)
datasheet p.1
Mass
68 g
datasheet p.4 68 g typ
CPU clock
100 MHz
product page
Envelope (L×W×H)
90 x 96 x 19 mm
datasheet p.4 96 x 90 x 1.6 mm (same size as CubeSat Kit Module) PCB width x length x thickness
RAM
0.125 MB
external 1Mbit static RAM · datasheet p.6 0.125 MB on-board fast static RAM for XRAM (1Mbit external static RAM …  |  0.125 MB static
Mass storage
128 GB
product page
Operating system
Pumpkin's Salvo™ RTOS
datasheet p.1 Salvo compatible with Pumpkin's Salvo RTOS
Supply voltage
3.3 V
nom. · SD Card Voltage · datasheet p.5 3.3 V Operating Voltage  |  3.3 V SD Card Voltage  |  3.3 V nom. · VCC operating voltage, typ
Data interface
I2C
datasheet p.11 JTAG JTAG and user interfaces for programming and debugging  |  I2C SDA_SYS / SCL_SYS, PPM pin descriptions - I2C Bus  |  SPI SDO0 / SDI0 / SCK0 on the PPM connector  |  UART UTX0 / URX0 on the PPM connector  +3
Operating temperature
-40–85 °C
absolute maximum ratings, TA · datasheet p.3 -55–125 °C C8051F120 alone, TA_MCU, absolute maximum ratings
Processor architecture
other
Silicon Labs C8051F120, 8-bit 8051 microcontroller (socketed,… · datasheet p.1
Board format
custom
90x96 mm PCB · datasheet p.4 CubeSat Kit bus PCB same size as a CubeSat Kit module; for the CubeSat Kit De…
Flight software support
Pumpkin's Salvo™ RTOS and HCC-Embedded's EFFS-THIN SD Card FAT file system
datasheet p.1
Radiation and fault mitigation
other
independent external reset supervisor (POR/BOR) · datasheet p.1 latch-up protection (current limiting) independent latchup (device overcurrent) protection; overcurr…
Connector
100-pin clamshell ZIF socket
datasheet p.1 100-pin hermaphroditic LSS-150-02-L-DV  |  10-pin 2x5 0.100" pitch dual-inline header J1  |  6-pin 1x6 0.100" pitch inline header J2
Satellite class
CubeSat
CubeSat nanosatellite control, C&DH, TT&C · datasheet p.1
GPIO lines
45
connections to 45 of 48 I/O pins of the PPM connector · datasheet p.6
RAM type
SRAM
on-board fast 128KB static RAM for XRAM · 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 supplier10 lines, in the manufacturer's own wording
SKU
710-00607
Mcu
Silicon Labs C8051F120, 8-bit, in 100-pin ZIF socket
Internal flash memory
128KB
Internal ram
8,848B
Max clock speed
100 MHz
External xram
128KB static RAM (on-board)
Hardware class
Development Hardware
Compatible with
Development Board (DB); Silicon Labs C8051F120; Silicon Labs USB Debug Adapter
Included in
CubeSat Kit /C8051 (PSPM B + PPM B1); CubeSat Kit Upgrade to C8051
Purchase restriction
Available only as an add-on to customers who have already purchased a complete CubeSat Kit /C8051

About

PSPM B is a pluggable socketed processor module (PSPM) for use with the CubeSat-compatible Development Board (DB). By adding a PSPM B to a DB, a user creates a CubeSat-compatible command-and-data-handling (C&DH) module built around Silicon Labs’ 8-bit C8051F120 low-power microcontroller (MCU). PSPM B holds the C8051F120 in a 100-pin ZIF (zero insertion force) socket, providing 128KB of internal Flash memory and 8,848B of internal RAM, and can run at speeds up to 100MHz. It also includes an on-board, external 128KB static RAM used as XRAM.

A fully tested PSPM B unit is supplied with a Silicon Labs C8051F120 MCU already installed in its ZIF socket. PSPM B is part of Pumpkin’s CubeSat Kit development hardware line and plugs into a Development Board (DB); it is used to create and debug C8051-based software and/or hardware for a CubeSat Kit. Because the processor is socketed (PSPM) rather than soldered on (as in the flight PPM), a mistake made during development (e.g., accidentally shorting two digital outputs) can be recovered from with a simple, inexpensive ($10 or less) processor replacement rather than discarding the whole board. PSPM B is electrically identical to the flight module PPM B1, so software developed and run on PSPM B in a development environment runs identically on PPM B1 in a flight environment.

PSPM B is compatible with the Development Board (DB), the Silicon Labs C8051F120, and the Silicon Labs USB Debug Adapter, and it is included in the CubeSat Kit /C8051 (which bundles PSPM B and PPM B1) as well as in the CubeSat Kit Upgrade to C8051. Purchasing restrictions apply: prospective customers must first purchase an entire C8051-based CubeSat Kit before this component can be ordered separately (“a la carte”), since supplemental information such as schematics and the required software are provided only with a full CubeSat Kit purchase.

Documentation

Need the full ICD, test reports or a specific revision? Ask the supplier directly.

Source: www.pumpkinspace.com ↗

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