Mini Carrier Board
Working Conditions and Performance
POWER Input Voltage / Rated Input Current
4-5.7V / 2.5A; 0-20V is safe for the system but it will not work
POWER rated output / input power
14 W
USB port input voltage / rated input current
4-5.7V / 250mA
Servo rail input voltage
4-10.5V
Waterproof performance
Not waterproof. External waterproof protection is needed
Working temperature
-10°C / 55°C
Size and Specifications
Mini Carrier Board Size / Chassis Material
47.5x38.5x17.8 (mm) / ABS Molding
Interfaces and Definitions
Pinout
The red dot on the plug side denotes Pin 1.
Mini Carrier Board Interface Model
GPS1
JST-GH 1.25 mm (8-pin)
GPS2
JST-GH 1.25 mm (6-pin)
TELEM1
JST-GH 1.25 mm (6-pin)
TELEM2
JST-GH 1.25 mm (6-pin)
I2C
JST-GH 1.25 mm (4-pin)
CAN2
JST-GH 1.25 mm (4-pin)
POWER1
Molex CLIK-Mate 2 mm (6-pin)
POWER2
Molex CLIK-Mate 2 mm (6-pin)
BUZZER
DF13 1.25 mm (2-pin)
Mini Cube 80-pin DF17 Connector Assignments (same as the Cube Black)
1
FMU_SWDIO
I/O
FMU serial wire debug I/O
2
FMU_LED_AMBER
O
Boot error LED (drive only, controlled by FET)
3
FMU_SWCLK
O
FMU serial wire debug clock
4
I2C_2_SDA
I/O
I2C data I/O
5
EXTERN_CS
O
Chip select for external SPI (NC, only for debugging)
6
I2C_2_SCL
O
I2C clock
7
FMU_!RESET
I
Reset pin for the FMU
8
PROT_SPARE_1
Spare
9
VDD_SERVO_IN
I
Power for last resort I/O failsafe
10
PROT_SPARE_2
Spare
11
EXTERN_DRDY
I
Interrupt pin for external SPI (NC, just for debugging)
12
SERIAL_5_RX
I
UART 5 RX (Receive Data)
13
GND
System GND
14
SERIAL_5_TX
O
UART 5 TX (Transmit Data)
15
GND
System GND
16
SERIAL_4_RX
I
UART 4 RX (Receive Data)
17
SAFETY
Safety button input
18
SERIAL_4_TX
O
UART 4 TX (Transmit Data)
19
VDD_3V3_SPEKTRUM_EN
O
Enable for the spectrum voltage supply
20
SERIAL_3_RX
I
UART 3 RX (Receive Data)
21
PRESSURE_SENS_IN
AI
Analogue port, for pressure sensor, or Laser range finder, or Sonar
22
SERIAL_3_TX
O
UART 3 TX (Transmit Data)
23
AUX_BATT_VOLTAGE_SENS
AI
Voltage sense for Aux battery input
24
ALARM
O
Buzzer PWM signal
25
AUX_BATT_CURRENT_SENS
AI
Current sense for Aux battery input
26
IO_VDD_3V3
I
IO chip power, pinned through for debugging
27
VDD_5V_PERIPH_EN
O
Enable voltage supply for Peripherals
28
IO_LED_SAFET_PROT
O
IO-LED_SAFETY(safety LED) pinned out for IRIS
29
VBUS
I
USB VBus (VDD)
30
SERIAL_2_RTS
UART 2 RTS (Request To Send)
31
OTG_DP1
I/O
USB Data+
32
SERIAL_2_CTS
UART 2 CTS (Clear To Send)
33
OTG_DM1
I/O
USB Data-
34
SERIAL_2_RX
I
UART 2 RX (Receive Data)
35
I2C_1_SDA
I/O
I2C data I/O
36
SERIAL_2_TX
O
UART 2 TX (Transmit Data)
37
I2C_1_SCL
O
I2C clock
38
SERIAL_1_RX
I
UART 1 RX (Receive Data)
39
CAN_L_2
I/O
FMU CAN bus Low signal driver
40
SERIAL_1_TX
O
UART 1 TX (Transmit Data)
41
CAN_H_2
I/O
FMU CAN bus High signal driver
42
SERIAL_1_RTS
UART 1 RTS (Request To Send)
43
VDD_5V_PERIPH_OC
I
Error state message from peripheral power supply
44
SERIAL_1_CTS
UART 1 CTS (Clear To Send)
45
VDD_5V_HIPOWER_OC
I
Error state message from High power peripheral power supply
46
IO_USART_1_TX
O
I/O USART 1 TX
47
BATT_VOLTAGE_SENS_PROT
AI
Voltage sense from main battery
48
IO_USART1_RX_SPECTRUM_DSM
O
Signal from Spectrum receiver
49
BATT_CURRENT_SENS_PROT
AI
Current sense from main battery
50
FMU_CH1_PROT
O
FMU PWM output channel 1
51
SPI_EXT_MOSI
O
External SPI, for debug only
52
FMU_CH2_PROT
O
FMU PWM output channel 2
53
VDD_SERVO
I
VDD_Servo, for monitoring servo bus
54
FMU_CH3_PROT
O
FMU PWM output channel 3
55
VDD_BRICK_VALID
I
Main power valid signal
56
FMU_CH4_PROT
O
FMU PWM output channel 4
57
VDD_BACKUP_VALID
I
Backup power valid signal
58
FMU_CH5_PROT
O
FMU PWM output channel 5
59
VBUS_VALID
I
USB bus valid signal
60
FMU_CH6_PROT
O
FMU PWM output channel 6
61
VDD_5V_IN_PROT
I
Main power (5V) into FMU from power selection
62
PPM_SBUS_PROT
I
PPM / S.Bus signal input
63
VDD_5V_IN_PROT
I
Main power (5V) into FMU from power selection
64
S.BUS_OUT
O
S.Bus signal output
65
IO_VDD_5V5
O
IO VDD 5.5 V
66
IO_CH8_PROT
O
I/O PWM output channel 8
67
SPI_EXT_MISO
I
External SPI, for debug only
68
IO_CH7_PROT
O
I/O PWM output channel 7
69
IO_SWDIO
I/O
I/O serial wire debug
70
IO_CH6_PROT
O
I/O PWM output channel 6
71
IO_SWCLK
O
I/O serial wire debug clock
72
IO_CH5_PROT
O
I/O PWM output channel 5
73
SPI_EXT_SCK
O
External SPI, for debug only
74
IO_CH4_PROT
O
I/O PWM output channel 4
75
IO_!RESET
I
I/O reset pin
76
IO_CH3_PROT
O
I/O PWM output channel 3
77
CAN_L_1
I/O
FMU CAN bus Low signal driver
78
IO_CH2_PROT
O
I/O PWM output channel 2
79
CAN_H_1
I/O
FMU CAN bus High signal driver
80
IO_CH1_PROT
O
I/O PWM output channel 1
Serial Ports Parameter and Power Distribution
SERIAL 1 / UART 1 | Connector： TELEM1
1
VCC_5V
OUT
5 V
RED/GRAY
VCC
2
SERIAL_1_TX
OUT
3.3 V - 5.0 V TTL
YELLOW/BLACK
UART 1 TX (Transmit Data)
3
SERIAL_1_RX
IN
3.3 V - 5.0 V TTL
GREEN/BLACK
UART 1 RX (Receive Data)
4
SERIAL_1_CTS (TX)
OUT
3.3 V - 5.0 V TTL
GRAY/BLACK
UART 1 CTS (Clear To Send)
5
SERIAL_1_RTS (RX)
IN
3.3 V - 5.0 V TTL
GRAY/BLACK
UART 1 RTS (Request To Send)
6
GND
GND
BLACK
GND
SERIAL 2 / UART 2 | Connector： TELEM2
1
VCC_5V
OUT
5 V
RED/GRAY
VCC
2
SERIAL_2_TX
OUT
3.3 V - 5.0 V TTL
YELLOW/BLACK
UART 2 TX (Transmit Data)
3
SERIAL_2_RX
IN
3.3 V - 5.0 V TTL
GREEN/BLACK
UART 2 RX (Receive Data)
4
SERIAL_2_CTS (TX)
OUT
3.3 V - 5.0 V TTL
GRAY/BLACK
UART 2 CTS (Clear To Send)
5
SERIAL_2_RTS (RX)
IN
3.3 V - 5.0 V TTL
GRAY/BLACK
UART 2 RTS (Request To Send)
6
GND
GND
BLACK
GND
SERIAL 3 / UART 3 (GPS) / I2C 1 | Connector： GPS1
1
VCC_5V
IN
5 V
RED
VCC Power Supply To GPS From AP
3
SERIAL_3_TX
OUT
3.3 V - 5.0 V TTL
BLACK
UART 3 TX (Transmit Data)
2
SERIAL_3_RX
IN
3.3 V - 5.0 V TTL
BLACK
UART 3 RX (Receive Data)
4
I2C_1_SCL
IN
3.3 V
BLACK
I2C 1 Clock Signal
5
I2C_1_SDA
IN/OUT
3.3 V
BLACK
I2C 1 Serial Data
6
BUTTON
GND
BLACK
Signal shorted to GND on press
7
IO_LED_SAFET_PROT
GND
BLACK
LED Driver For Safety Button
8
GND
GND
BLACK
GND Connection
SERIAL 4 / UART 4 / I2C 2 | Connector： GPS2
1
VCC_5V
OUT
5 V
RED/GRAY
VCC Power Supply To GPS From AP
2
SERIAL_4_TX
OUT
3.3 V - 5.0 V TTL
YELLOW/BLACK
UART 4 TX (Transmit Data)
3
SERIAL_4_RX
IN
3.3 V - 5.0 V TTL
GREEN/BLACK
UART 4 RX (Receive Data)
4
I2C_2_SCL
OUT
3.3 V - 5.0 V
GRAY/BLACK
I2C 2 Clock Signal
5
I2C_2_SDA
IN
3.3 V - 5.0 V
GRAY/BLACK
I2C 2 Serial Data
6
GND
GND
BLACK
GND
Buzzer | Connector： BUZZER
1
BUZZER
OUT
Battery voltage
GRAY/BLACK
VBAT (8.4 - 42 V)
2
GND
GND
BLACK
GND Connection
I2C 2 | Connector： I2C 2
1
VCC_5V
OUT
+5 V
RED/GRAY
Power supply
2
SCL
IN/OUT
+3.3 V (PULLUPS)
BLUE/BLACK
SCL, 5 V level, pull-up on AP
3
SDA
IN/OUT
+3.3 V (PULLUPS)
GREEN/BLACK
SDA, 5 V level, pull-up on AP
4
GND
GND
BLACK
GND Connection
Main Power POWER 1 | Connector： POWER1
1
VDD_5V_BRICK
IN
5 V
RED/GRAY
Supply To AP from Power Brick
2
VDD_5V_BRICK
IN
5 V
RED/GRAY
Supply To AP from Power Brick
3
BATT_CURRENT_SENS_PROT
IN
3.3 V
BLACK
Battery Current Connecter
4
BATT_VOLTAGE_SENS_PROT
IN
3.3 V
BLACK
Battery Voltage Connecter
5
GND
GND
BLACK
GND
6
GND
GND
BLACK
GND
Backup Power POWER 2 | Connector： POWER2
1
VDD_5V_BRICK
IN
5 V
RED/GRAY
Supply To AP from Power Brick
2
VDD_5V_BRICK
IN
5 V
RED/GRAY
Supply To AP from Power Brick
3
AUX_BATT_CURRENT_SENS
IN
3.3 V
BLACK
Aux Battery Current Connecter
4
AUX_BATT_VOLTAGE_SENS
IN
3.3 V
BLACK
Aux Battery Voltage Connecter
5
GND
GND
BLACK
GND Connection
6
GND
GND
BLACK
GND
CAN | Connector： CAN2
1
VCC_5V
OUT
5 V
RED/GRAY
VCC Power Supply
2
CAN_H_2
IN/OUT
12 V
YELLOW/BLACK
CAN High
3
CAN_L_2
IN/OUT
12 V
GREEN/BLACK
CAN Low
4
GND
GND
BLACK
GND
IO USART 1 / DSM | Connector： SPKT
1
IO_USART1_RX_SPECTRUM_DSM
IN
IO USART 1 RX, DSM INPUT
2
GND
GND
GND
3
VDD_3V3_Spektrum
OUT
3.3 V
Independent Power Supply
CPPM / S.BUS / SERVO SYSTEM | Connector： RCIN MAIN OUT
S - 1
IO_CH1_PROT
OUT
3.3 V Servo Signal, Servo Rail Power
PWM Signal
S - 2
IO_CH2_PROT
OUT
3.3 V Servo Signal, Servo Rail Power
PWM Signal
S - 3
IO_CH3_PROT
OUT
3.3 V Servo Signal, Servo Rail Power
PWM Signal
S - 4
IO_CH4_PROT
OUT
3.3 V Servo Signal, Servo Rail Power
PWM Signal
S - 5
IO_CH5_PROT
OUT
3.3 V Servo Signal, Servo Rail Power
PWM Signal
S - 6
IO_CH6_PROT
OUT
3.3 V Servo Signal, Servo Rail Power
PWM Signal
S - 7
IO_CH7_PROT
OUT
3.3 V Servo Signal, Servo Rail Power
PWM Signal
S - 8
IO_CH8_PROT
OUT
3.3 V Servo Signal, Servo Rail Power
PWM Signal
S - 9
PPM_SBUS_PROT
IN/OUT
3.3 V / 4.5 V Powered
PPM / S.Bus Signal
PPM S.bus Signal and SPKT Signal Switching
By default, the Mini carrier board uses PPM and S.bus (PPM/S.B) for the RC IN input. Specifically,
Left center pad is connected to the 5V pad (provides power).
Right center pad is connected to the PPM/S.B pad (receives the signal).
To modify the PCB to receive SPKT signals, complete the following steps:
Cut the existing connections:
Disconnect the left center pad from the 5V pad.
Disconnect the right center pad from the PPM/S.B pad.
Solder the new connections:
Connect the 3V3 pad to the left center pad.
Connect the SPKT pad to the right center pad.
The following Github link can be used to revise and update the Mini carrier board information: https://github.com/CubePilot/cubepilot-docs/edit/master/carrier-boards/mini-carrier-board.md
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