Nanosatellite onboard computer collects infor-
mation from sensors, process measurements, store ob-
tained results, form control actions, process telecom-
mands and forming telemetry packets.
The basis of the computer is two independent mi-
crocontrollers, equipped with two cores ARM Cortex
M4F and Cortex M0; Atmel AVR. This configuration
provides various ways of combination RTOS, GPOS,
firmware cores and different modes.
Data storage consists of duplicate Flash memory
cards with shared access and embedded SDRAM and
Flash.
Two sets of three
-
axis sensors are integrated in the
onboard computer: accelerometer, gyroscope, magne-
tometer, various digital and analog interfaces are pro-
vided for connecting external devices.
Power bars are divided into separate branches,
protecting each group of devices separately. RTC has
a battery backup power supply.
Технические характеристики
Cores
AVR, M0, M4F
Clock frequency
8; 200
MHz
RTC battery backup time
5
month
Micro SD card
32
Gb
Magnetometer, accelerometer,
gyroscope resolution
16
Bit
Magnetometer, accelerometer,
gyroscope scale ranges
4.8; 2;
250
mT; g;
°/s
2 independent MCU
3 cores: AVR, Cortex M0, Cortex M4F
2 set of 3D accelerometer, gyroscope, magne-
tometer
I2C, UART, SGPIO, CAN interfaces
2 microSD cards with shared access
5 independent power monitor
WDT, RTS
ADC, DAC
FreeRTOS, uLinux
FE±²U³E´
OvE³vIEw
MCU x2
ADCS
sensors
ERM8/ERF8
Clamping
connector
CablingFREE
I2C MUX
Technical characteristics
VCC
I2C
UART
9
4
SPI
CAN
SGPIO
10
PDI
JTAG
ADC
8
GND
PWM
3
Main bus
Gyroscope,
Accelerometer,
Magnetometer
x2
microSD x2
MCU
°
1
MCU
°
2
Cortex M4, M0
RTC x2
Flash memory
SDRAM
Power
monitor
Indication