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Mini Carrier Board

Working Conditions and Performance

About 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 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

Red dot on 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 # 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, just 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 # 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 # 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 # 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 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

SERIAL 5 / UART 5 (Debug Console) / S.Bus OUT | Connector: CONS SBUSo

Pin # Name Direction Voltage Caption
1 SBUSo S.Bus_Out OUT S.Bus Signal Output
2 CONS SERIAL_5_TX OUT 3.3 V - 5.0 V TTL UART 5 TX (Transmit Data)
3 SBUSo VDD_SERVO OUT SERVO
4 CONS SERIAL_5_RX 3.3 V - 5.0 V TTL UART 5 RX (Receive Data)
5 SBUSo GND GND GND
6 CONS GND GND GND

Buzzer | Connector: BUZZER

Pin # 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 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 # 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 # 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 # 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

Pin # Name Direction Voltage Caption
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

Pin # Name Direction Voltage Caption
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, Mini Carrier Board uses PPM and S.bus in RC IN. If you want to switch it to SPKT signals, you need to solder the carrier board as shown below:

The middle solder pad of the left hand side is shorted with 5v pin. Therefore, you need to break their connection on PCB. The middle solder pad of the right hand side is shorted with PPM/S.B, so break their connection on PCB as well.

Solder the 3v3 solder pad with the middle solder pad at left hand side; and solder the SPKT solder pad with the middle solder pad at right hand side. So that RC IN port is compatible with SPKT signal.

Last update: 10th Jan 2019

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