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MRE

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Hardware/microrusefi/Hardware_microRusEfi.md Normal file
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microRusEfi is a highly integrated board for rusEfi ECU. microRusEfi is targeted at port injected
gasoline engines with one, two, three or four cylinders. microRusEfi has means to control electronic throttle body.
microRusEfi latest schematics is available at https://github.com/rusefi/hw_microRusEfi/blob/master/microRusEfi.pdf
Complete set of board source files is available at https://github.com/rusefi/hw_microRusEfi
Board overview:
- about 10 analog inputs
- One VR/Hall input channel for crank sensor
- One Hall input channel for crank sensor
- 4 injector output channels
- 4 logic level coil control channels (external igniters could be needed for some coils)
- USB
- CAN
For wiring see

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Hardware/microrusefi/Hardware_microRusEfi_wiring.md Normal file
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# Connector Pinout
<mark>insert connector image/pins here</mark>
# Pin Descriptions
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 |
| ----------:|:-------- | ------- |:---------------------------------------------- |
| 1 | **12V** | 12V | 12V supply |
| 2 | **GND** | pgnd | Power GND |
| 3 | **Lowside 2** | ls | Idle solenoid |
| 4 | **ETB+** | etb | ETB+ |
| 5 | **12V** | 12V | 12V supply |
| 6 | **GND** | pgnd | Power GND |
| 7 | **Lowside 1** | ls | VVT |
| 8 | **ETB-** | etb | ETB- |
| 9 | **Ignition 1** | ign | Ignition 1 |
| 10 | **Ignition 2** | ign | Ignition 2 |
| 11 | **Ignition 3** | ign | Ignition 3 |
| 12 | **Ignition 4** | ign | Ignition 4 |
| 13 | **GP out 6** | gp1 | Alternator |
| 14 | **GP out 5** | gp1 | |
| 15 | **USB D-** | usb | USB |
| 16 | **USB D+** | usb | USB |
| 17 | **GND** | sgnd | Signal GND |
| 18 | **AN Temp 1** | at | CLT sensor |
| 19 | **AN Volt 4** | av | |
| 20 | **AN Volt 5** | av | |
| 21 | **GND** | sgnd | Signal GND |
| 22 | **AN Temp 4** | at | |
| 23 | **AN Temp 2** | at | IAT sensor |
| 24 | **AN Temp 3** | at | External wideband O2 sensor |
| 25 | **Cam (hall)** | hall | |
| 26 | **AN Volt 2** | av | TPS sensor |
| 27 | **AN Volt 1** | av | MAP sensor |
| 28 | **AN Volt 10** | av | |
| 29 | **Main relay** | mr | Main relay |
| 30 | **AN Volt 7** | av | |
| 31 | **AN Volt 3** | av | |
| 32 | **AN Volt 6** | av | |
| 33 | **GP out 3** | gp2 | |
| 34 | **GP out 2** | gp2 | Fan relay |
| 35 | **GP out 1** | gp2 | Fuel pump relay |
| 36 | **AN Volt 8** | av | |
| 37 | **Injector 1** | inj | Injector 1 |
| 38 | **Injector 2** | inj | Injector 2 |
| 39 | **5V Sensor 2** | 5v | MAP sensor supply |
| 40 | **AN Volt 9** | av | |
| 41 | **Injector 3** | inj | Injector 3 |
| 42 | **Injector 4** | inj | Injector 4 |
| 43 | **GP out 4** | gp2 | |
| 44 | **5V Sensor 1** | 5v | TPS sensor supply |
| 45 | **VR+/Hall** | vr/hall | Crank VR+/hall |
| 46 | **VR-** | vr | Crank VR- (do not connect if hall) |
| 47 | **CAN low** | can | CAN bus |
| 48 | **CAN high** | can | CAN bus |
# 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.
## Input
| ID | Type | Notes & Limits | Possible functions |
|------|---------------------| ------------------------------------------------------------------------------------ | --- |
| at | Analog temperature | Analog temperature (thermistor) input. <mark>2.7k/TBD</mark> 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 | <mark>TBD pull up to 5v</mark> 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<br/>**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
| gp1 | General purpose push-pull | General purpose push-pull output, 5V/12V (internally selectable) 250mA maximum | General purpose 5V/12V push-pull, ignition coil
| gp2 | General purpose push-pull | General purpose push-pull output, 12V 500mA maximum | General purpose 12V push-pull
| 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<br/>throttle body directly to these two pins.
## Communication
| ID | Type | Notes & Limits |
|----|-------------| ---- |
| usb | USB | USB tuning interface
| can | CAN bus | CAN communication