ISIS On Board Computer
Flight Heritage since 2014€4,400 – €9,850
The ISIS on board computer (IOBC) is a flight qualified, high performance processing unit based around an ARM9 processor with a speed of 400 MHz, making it one of the most capable on-board computers currently available on the market within the same price range. Its pluggable daughter board offers additional flexibility and customizability by providing a wide range of extra interfaces for payloads, sensors or actuators in a compact form factor.
- Features
- Product properties
- Performance
- Configurations
- Qualification and acceptance testing
- Documents/CAD
Features
- JTAG programmer
- 400 MHz, power efficient ARM9 processor
- Free RTOS operating system for simple and lightweight cooperative multitasking
- Data Storage:
- Redundant SD Card storage 2x2GB (other sizes are available on request) with FailSafe FAT journaling file system
- 256kB FRAM: reliable Non-Volatile Storage
- 2x redundant Real Time Clock
- On-board temperature sensor
- External on-board watchdog and power-controller
- Robust design
- Includes Hardware Abstraction Layer software
This library supports the following peripherals:- I2C master mode
- I2C slave mode
- Pulse Width Modulation (PWM)
- UART (RS232, RS422, RS485)
- SPI master mode
- FRAM read and write
- SD card using failsafe FAT journalling filesystem
- Real-Time Clock (RTC) and OBC internal timer (RTT)
- Debug LED control
This library offers the following additional functionality:
- Checksumming (CRC-8, CRC-16, CRC-32)
- Interface to iOBC Supervisor
- Watchdog kicking
- Timekeeping
- FreeRTOS operating system
- AT91 library from Atmel
- Compatible with standard CubeSat components available from ISIS
- Compatible with Gomspace EPS
- Compliant with CubeSat standard
Product properties
- Operating Temperature: -25 degC to +65 degC
- Power Supply: 3.3V
- Dimension: 96 x 90 x 12.4 [mm] (including FM daughter board)
- Mass: 94g (including FM daughter board)
Performance
- Processor: 400MHz 32-bit ARM9 processor
- Volatile Memory: 64MB RAM
- Data Storage: 2x 2GB (high reliability SD cards) or 2x any size standard SD cards
- Code Storage: 1MB NOR Flash
- FRAM: 256KB
- Power Consumption: 400mW average (550 mW max @3.3V)
- Interface
- I2C (master or slave, up to 400 kbits/s on fast mode)
- SPI: up to 8 slaves, up to 10 Mbit/s
- UART: 2x RS232 or 1x RS232 + 1x RS485/RS422
- ADC: 8 channel, 10-bit
- PWM: 6 channel
- GPIO: up to 27
- 1x USB host
- 1x USB device
- Image Sensor Interface for directly interfacing CMOS Image Sensors
- JTAG for programming
- Debug port: UART for console user-interface
- 4x LEDs (Engineering Model only) to support testing and debugging
Available configurations
Main board with:
- EM daughter board
- Provides easy access to all interfaces for development and debugging
- FM daughter board
- All interfaces in compact form factor
- High reliability connectors for flight
- Custom daughter board
- Design your own daughterboard with additional interfacing and electronics based on mission requirements
- No daughter board
Additional Software on demand:
Qualification and Acceptance testing
| Test | QT | AT |
| Functional | ✔ | ✔ |
| Vibration | ✔ | ‐ |
| Mechanical Shock | ✔ | ‐ |
| Thermal Cycling | ✔ | ✔ |
| Thermal Vacuum | ✔ | ‐ |
*QT is performed on the design/qualification model
*AT is performed on the unit to be shipped
