rusefi_documentation/Hardware-microRusEFI.md

# microRusEFI

## Buy here

[rusEFI store](https://www.shop.rusefi.com/shop)

microRusEFI is a highly integrated board version of the rusEFI ECU. The microRusEFI ECU is targeted at port-injected
gasoline engines up to 4 cylinders.

[Connector Pinout](Hardware-microRusEFI-wiring)

[Latest Schematics](https://github.com/rusefi/hw_microRusEfi/blob/master/microRusEfi_Schematic.pdf)

[Forum Thread](https://rusefi.com/forum/viewtopic.php?f=4&t=1538)

[Board Source Files](https://github.com/rusefi/hw_microRusEfi)

## Capabilities

* Primary VR or Hall input (configurable with few resistor changes)
* Secondary Hall input
* x4 analog thermistor (temperature) inputs
* x10 analog voltage inputs (0-5v)
* x4 high-Z injector outputs
* x2 high-current low side outputs for IAC/VVT/other solenoids
* Dedicated main relay control output
* x4 low-current low side outputs for relays or warning lights
* x4 5v logic level ignition outputs
* x2 5v/12v configurable logic level outputs (requires resistor changes)
* Electronic throttle body (drive by wire)
* CAN connectivity on the plug
* USB connectivity on the plug

[Connector Pinout](Hardware-microRusEFI-wiring)

Main Relay Wiring:

![wiring diagram](https://user-images.githubusercontent.com/48498823/90672739-94b7e080-e224-11ea-92fb-12a4fdc5b056.png)

![microRusEFI image](https://user-images.githubusercontent.com/5051341/80747087-806e9d00-8ae8-11ea-983e-330dfc6e3015.jpg)
![microRusEFI image](https://user-images.githubusercontent.com/5051341/80747096-849aba80-8ae8-11ea-862c-d124ef75f06a.jpg)

## FAQ

Q: How about 6 cylinders sequential on microRusEFI?

A: The microRusEFI ECU is primarily a 4 cylinder ECU. At this time the testing for safety, reliable control, and consistency have not been completed for running the microRusEFI ECU on a 6 cylinder engine. This is something that we are working on and could be added at a future point.
See [https://github.com/rusefi/hw_microRusEfi/issues/203](https://github.com/rusefi/hw_microRusEfi/issues/203)

Q: what about stepper idle?

A: yes microRusEFI can drive 4 wire idle air valves see setting at https://github.com/rusefi/rusefi/pull/3749

[See also Kit Instructions](Hardware-microRusEFI-kit-instructions)
fix page titles 2022-01-25 17:01:06 -08:00			`# microRusEFI`

fix store links 2023-01-31 09:54:14 -08:00			`## Buy here`

			`[rusEFI store](https://www.shop.rusefi.com/shop)`
Updated Hardware_microRusEfi (markdown) 2020-05-11 13:19:59 -07:00
Updated Hardware_microRusEfi (markdown) 2020-04-30 11:38:53 -07:00			`microRusEFI is a highly integrated board version of the rusEFI ECU. The microRusEFI ECU is targeted at port-injected`
automated md lint fixes 2023-01-02 11:22:23 -08:00			`gasoline engines up to 4 cylinders.`
MRE 2019-06-23 08:38:59 -07:00
automagically fix links 2021-02-15 20:22:03 -08:00			`[Connector Pinout](Hardware-microRusEFI-wiring)`
MRE 2019-06-23 08:38:59 -07:00
automated md lint fixes 2023-01-02 11:22:23 -08:00			`[Latest Schematics](https://github.com/rusefi/hw_microRusEfi/blob/master/microRusEfi_Schematic.pdf)`
MRE 2019-06-23 08:38:59 -07:00
Updated Hardware microRusEFI (markdown) 2021-07-13 09:13:50 -07:00			`[Forum Thread](https://rusefi.com/forum/viewtopic.php?f=4&t=1538)`
Updated Hardware_microRusEfi (markdown) 2019-07-07 14:29:42 -07:00
Updated Hardware microRusEFI (markdown) 2021-07-13 09:13:50 -07:00			`[Board Source Files](https://github.com/rusefi/hw_microRusEfi)`
MRE 2019-06-23 08:38:59 -07:00
Lint (#360) * auto fixes * started fixing * more fixing * lint with gha * and more fixing * and even more fixing * and even more fixing yet * fix home * am idiot * fix workflow name 2023-01-06 17:10:33 -08:00			`## Capabilities`
automated md lint fixes 2023-01-02 11:22:23 -08:00
docs improvements 2020-03-26 22:39:10 -07:00			`* Primary VR or Hall input (configurable with few resistor changes)`
			`* Secondary Hall input`
			`* x4 analog thermistor (temperature) inputs`
			`* x10 analog voltage inputs (0-5v)`
			`* x4 high-Z injector outputs`
			`* x2 high-current low side outputs for IAC/VVT/other solenoids`
automated md lint fixes 2023-01-02 11:22:23 -08:00			`* Dedicated main relay control output`
			`* x4 low-current low side outputs for relays or warning lights`
Updated Hardware_microRusEfi (markdown) 2020-04-30 09:04:44 -07:00			`* x4 5v logic level ignition outputs`
docs improvements 2020-03-26 22:39:10 -07:00			`* x2 5v/12v configurable logic level outputs (requires resistor changes)`
			`* Electronic throttle body (drive by wire)`
			`* CAN connectivity on the plug`
automated md lint fixes 2023-01-02 11:22:23 -08:00			`* USB connectivity on the plug`
docs improvements 2020-03-26 22:39:10 -07:00
automagically fix links 2021-02-15 20:22:03 -08:00			`[Connector Pinout](Hardware-microRusEFI-wiring)`
MRE 2019-06-23 08:38:59 -07:00
Updated Hardware microRusEFI (markdown) 2021-07-13 12:10:31 -07:00			`Main Relay Wiring:`

Lint (#360) * auto fixes * started fixing * more fixing * lint with gha * and more fixing * and even more fixing * and even more fixing yet * fix home * am idiot * fix workflow name 2023-01-06 17:10:33 -08:00			`![wiring diagram](https://user-images.githubusercontent.com/48498823/90672739-94b7e080-e224-11ea-92fb-12a4fdc5b056.png)`
MRE 2019-06-23 08:38:59 -07:00
Updated Hardware_microRusEfi (markdown) 2020-04-30 13:29:14 -07:00			`![microRusEFI image](https://user-images.githubusercontent.com/5051341/80747087-806e9d00-8ae8-11ea-983e-330dfc6e3015.jpg)`
			`![microRusEFI image](https://user-images.githubusercontent.com/5051341/80747096-849aba80-8ae8-11ea-862c-d124ef75f06a.jpg)`
MRE 6-8 clarification 2020-04-24 14:13:23 -07:00
Lint (#360) * auto fixes * started fixing * more fixing * lint with gha * and more fixing * and even more fixing * and even more fixing yet * fix home * am idiot * fix workflow name 2023-01-06 17:10:33 -08:00			`## FAQ`
MRE 6-8 clarification 2020-04-24 14:13:23 -07:00
Updated Hardware_microRusEfi (markdown) 2020-04-30 13:29:14 -07:00			`Q: How about 6 cylinders sequential on microRusEFI?`
MRE 6-8 clarification 2020-04-24 14:13:23 -07:00
MRE 6 cylinder 2020-11-14 11:53:08 -08:00			`A: The microRusEFI ECU is primarily a 4 cylinder ECU. At this time the testing for safety, reliable control, and consistency have not been completed for running the microRusEFI ECU on a 6 cylinder engine. This is something that we are working on and could be added at a future point.`
automated md lint fixes 2023-01-02 11:22:23 -08:00			`See [https://github.com/rusefi/hw_microRusEfi/issues/203](https://github.com/rusefi/hw_microRusEfi/issues/203)`
updates 2020-05-13 10:01:02 -07:00
Updated Hardware microRusEFI (markdown) 2024-04-28 10:30:43 -07:00			`Q: what about stepper idle?`

			`A: yes microRusEFI can drive 4 wire idle air valves see setting at https://github.com/rusefi/rusefi/pull/3749`

fix page titles 2022-01-25 17:01:06 -08:00			`[See also Kit Instructions](Hardware-microRusEFI-kit-instructions)`