11 KiB
Connector Pinout
Rear side of PCB
Pin Descriptions
Left/right while looking from wires to plug, with white on top
Each pin has a Type ID, which can be used to look up in the following tables what the pin is for, and what functions it can perform.
| Pin Number | Name | Type ID | Default function | rusEFI pigtail color |
|---|---|---|---|---|
| 1 | 12V | 12V | 12V supply from main relay output, see also pin #29 | white right |
| 2 | GND | pgnd | Power GND | white |
| 3 | Lowside 2 | ls | Idle solenoid | white |
| 4 | ETB+ | etb | ETB+ | white |
| 5 | 12V | 12V | 12V supply from Key (turn on/off power) | black |
| 6 | GND | pgnd | Power GND | black |
| 7 | Lowside 1 | ls | VVT | black |
| 8 | ETB- | etb | ETB- | black |
| 9 | Ignition 1 | ign | Ignition 1 | dark blue |
| 10 | Ignition 2 | ign | Ignition 2 | dark blue |
| 11 | Ignition 3 | ign | Ignition 3 | dark blue |
| 12 | Ignition 4 | ign | Ignition 4 | dark blue |
| 13 | GP out 6 | gp_high | Alternator (see JP2 jumper note) | yellow |
| 14 | GP out 5 | gp_high | (see JP2 jumper note) | yellow |
| 15 | USB D- | usb | USB white wire https://youtu.be/4v2VnP-YdlQ | yellow |
| 16 | USB D+ | usb | USB green wire https://youtu.be/4v2VnP-YdlQ | yellow |
| 17 | GND | sgnd | Signal GND | red right |
| 18 | AN Temp 1 | at | CLT sensor | red |
| 19 | AN Volt 4 | av | Starting from version 0.5.0 this pin can be used as 5V input for USB connection through main connector (No need to open case to access micro-USB connector) | red |
| 20 | AN Volt 5 | av | Throttle position sensor (TPS) | red left |
| 21 | GND | sgnd | Signal GND | dark green |
| 22 | AN Temp 4 | at | dark green | |
| 23 | AN Temp 2 | at | IAT sensor | dark green |
| 24 | AN Temp 3 | at | dark green | |
| 25 | Cam (hall) | hall | light blue right | |
| 26 | AN Volt 2 | av | light blue | |
| 27 | AN Volt 1 | av | MAP sensor | light blue |
| 28 | AN Volt 10 | av | light blue left | |
| 29 | Main relay | mr | Main relay control signal (low side) | pink right |
| 30 | AN Volt 7 | av | pink | |
| 31 | AN Volt 3 | av | Throttle Pedal Position Sensor (PPS) | pink |
| 32 | AN Volt 6 | av | External wideband O2 sensor | pink |
| 33 | GP out 3 | gp_low (gp_pp) | (IDLE stepper coil 2+) | orange right |
| 34 | GP out 2 | gp_low (gp_pp) | Fan relay (IDLE stepper coil 1-) | orange |
| 35 | GP out 1 | gp_low (gp_pp) | Fuel pump relay (IDLE stepper coil 1+) | orange |
| 36 | AN Volt 8 | av | orange left | |
| 37 | Injector 1 | inj | Injector 1 | grey right |
| 38 | Injector 2 | inj | Injector 2 | grey |
| 39 | 5V Sensor 2 | 5v | MAP sensor supply | grey |
| 40 | AN Volt 9 | av | grey | |
| 41 | Injector 3 | inj | Injector 3 | brown right |
| 42 | Injector 4 | inj | Injector 4 | brown |
| 43 | GP out 4 | gp_low (gp_pp) | (IDLE stepper coil 2+) | brown |
| 44 | 5V Sensor 1 | 5v | TPS sensor supply | brown left |
| 45 | VR+/Hall | vr/hall | Crank VR+/hall | light green right |
| 46 | VR- | vr | Crank VR- (do not connect if hall) | light green |
| 47 | CAN low | can | CAN bus | light green |
| 48 | CAN high | can | CAN bus | light green |
In some cases without "main relay output +12v" both pins #1 and #5 should be connected to the single source of +12v.
Pin #1 feeds ETB H-bridge, battery voltage sense, gp5 & gp6 high-side +12v, TLE8888 H-bridges.
Pin Types
These tables provide technical information about the different types of pin found on microrusEfi.
Power
| ID | Type | Notes & Limits |
|---|---|---|
| 12V | Power supply | 9-22V operating, 5A fuse recommended |
| pgnd | Power ground | Solidly ground directly to chassis or engine block. |
| sgnd | Signal ground | Sensor ground. Do not ground to engine! |
| 5v | 5V sensor supply | 5V supply for external sensors. 200mA maximum per pin. |
Stepper
| Pin | Name | Notes & Limits |
|---|---|---|
| #33 | GP4 | Coil #2 |
| #34 | GP2 | Coil #1 |
| #35 | GP1 | Coil #1 |
| #43 | GP4 | Coil #2 |
Input
| ID | Type | Notes & Limits | Possible functions |
|---|---|---|---|
| at | Analog temperature | Analog temperature (thermistor) input. 2.7k/TBD pullup resistor to 5v | Thermistor temperature sensor, fuel level sender (variable resistor type) |
| av | Analog voltage | Analog voltage input. 500k pull down to GND | Analog voltage sensor (MAP, TPS, acc pedal, oil pressure, etc) |
| vr | Variable reluctor | VR crank input | VR sensors including crank, cam, vehicle speed |
| hall | Hall cam/crank | TBD pull up to 5v hall sensor for cam/crank | Hall sensors including crank, cam, vehicle speed |
Output
| ID | Type | Notes & Limits | Possible functions |
|---|---|---|---|
| inj | Injector output | Low side, 2.2A maximum Only saturated (high impedance) injectors are supported. |
Injector, general purpose low side |
| ign | Ignition output | 5V push-pull, 250mA maximum | Ignition coil, general purpose 5V push-pull |
| ls | High power low side | General purpose low side output, 4.5A maximum | General purpose low side, injector |
| gp_high | General purpose high side | General purpose high side push output, 5V/12V (internally selectable based on JP2 jumper) 250mA maximum | General purpose 5V/12V high side, ignition coil |
| gp_low | General purpose low side | General purpose low side pull output, 12V 500mA maximum | General purpose low side |
| gp_pp | General purpose Push-Pull | General purpose push-pull (low and high side) output, 600mA | Bipolar IDLE stepper, relays, solenoids |
| mr | Main relay | Dedicated main relay output. Low side turned on with power, 800mA maximum. | Main relay |
| etb | Electronic throttle | Dedicated electronic throttle outputs. Connect a brushed motor throttle body directly to these two pins. |
Communication
| ID | Type | Notes & Limits |
|---|---|---|
| usb | USB | USB tuning interface |
| can | CAN bus | CAN communication |
USB cable green wire: USB D+ DATA+
USB cable white wire: USB D- DATA-
USB cable black wire: ground
USB cable red wire: +5v (would not work via microRusEfi connector for versions < 0.5.0)
Hall type Crank sensor
See TLE8888 datasheet figure 71 R9=DNP R15=DNP R17=2.7K pull-up to 5v
R12=10K R13=0R
Extra pins
microRusEFI exposes the following pins in addition to the primary 48 pin connector:
J4:
| N | Name | Possible functions (not all listed!) |
|---|---|---|
| 9 | GNS | GND |
| 4 | VDD | 3.3V |
| 1 | 5V | 5V |
| 2 | 12V | 12V from Main Relay |
| 3 | PB8 | I2C1_SCL or CAN1_RX |
| 6 | PB9 | I2C1_SDA or CAN1_TX |
| 8 | PC10 | SPI3_SCK or USART3_TX or UART4_TX |
| 5 | PC11 | SPI3_MISO or USART3_RX or UART4_RX |
| 10 | PC12 | SPI3_MOSI or USART3_CK or UART5_TX |
| 7 | PA15 | SPI3_NSS (Chip Select) |
Three GPIOs are available on J2 (SWD) connector. If you are not going to use debuger J2 connector can be used for other purposes.
| N | Name | Possible functions (not all listed!) |
|---|---|---|
| 7, 8 | GND | GND |
| 1, 2 | 5V | 5V |
| 3, 4 | VDD | 3.3V |
| 5 | SCK | SWD clock or PA14 gpio (no alternative functions) |
| 9 | SWDIO | SWD data or PA13 gpio (no alternative functions) |
| 6 | SWO | SWD/JTAG data out (?) or SPI1_SCK or SPI3_SCK |
| 10 | NRST | CPU reset input (active low) |
For HW version 0.5.0 and newer some additional GPIOs are available on testpoints around STM32.
Please refer to PCB layout for exact positions of this testpoints (no silk refdefs on PCB).
| Tespoint | GPIO | Possible functions (not all listed!) |
|---|---|---|
| J6 | PE0 | GPIO |
| J8 | PB7 | USART1_RX or TIM4_CH2 |
| J9 | PC13 | GPIO only |
| J10 | PE6 | TIM9_CH2 |
| J11 | PE5 | TIM9_CH1 |
| J16 | PD0 | CAN1_RX |
Please refer to STM32F407 chip documentation for full list of alternative functions of GPIOs listed above.