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Mini Carrier Board

Working Conditions and Performance

Parameter
Description

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

Type
Description

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

Ports
Corresponding Connecter 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)

Pin Number
Name
Direction
Description

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

Pin Number
Name
Direction
Voltage
Wire Color
Caption

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

Pin Number
Name
Direction
Voltage
Wire Color
Caption

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

Pin Number
Name
Direction
Voltage
Wire Color
Caption

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

Pin NUmber
Name
Direction
Voltage
Wire Color
Caption

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

Pin Number
Name
Direction
Voltage
Wire Color
Caption

1

BUZZER

OUT

Battery voltage

GRAY/BLACK

VBAT (8.4 - 42 V)

2

GND

GND

BLACK

GND Connection

I2C 2 | Connector： I2C 2

Pin Number
Name
Direction
Voltage
Wire Color
Caption

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

Pin Number
Name
Direction
Voltage
Wire Color
Caption

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

Pin Number
Name
Direction
Voltage
Wire Color
Caption

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

Pin Number
Name
Direction
Voltage
Wire Color
Caption

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:

  1. Cut the existing connections:

    • Disconnect the left center pad from the 5V pad.

    • Disconnect the right center pad from the PPM/S.B pad.

  2. 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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