AND

11..13 (likely 12) DPAK outputs sound right (including WBO2 heater).

* all of them are flyback capable, except 2..3:

** 1 FET for WBO2 heater

** 1..2 HV IGBT output that can drive relay or small solenoid

* flyback for max 3 can be throughole (or simple SMB diode)

8 channels that are capable of controlled flyback (with PNP darlington DPAK)

* exactly 8 DPAK outputs can be high-freq PWM-ed (64usec, for injectors). The rest can be soft-PWM-ed, like 30 Hz for boost solenoid

* and 5 DPAK outputs can be IGBT HV (for ignition coil). 6 might be possible, but 5 is important.

As you see (8+5=13), so either we have

* 13 DPAK-s

* or 12 DPAKs, but than 1 channel is hibrid: HV capable with optional controlled flyback (not populated in certain configurations)

optionally - likely DROPPED: 1 lowside driver with 350mA rating, limited to fuel pump relay or small solenoid SOT23 NPN should be fine. protection:

* Some flyback gizmo (BAW56?)

* something that can handle the current with some margin, having a polyswitch to protect it would be nice.

This is a space-saving thing, so the 350mA driver can be left off if(DPAK>=12) => so the 16 EC36 output pins (this includes stepper) cannot decrease. Makes little sense, an IGBT without flyback should be better for almost same footprint

Usage

* For a V8, a CDI board would be used or injection would be 4 banks and 4 ign outputs for wasted spark.

* For a I5, 5 inj + 5 ign + 1 WBO2 + 0..2 outputs for other stuff (boostcontrol, etc...) This is the most demanding configuration that is likely to be supported by the limited EC36 pincount

* For an I6, 6 inj + 3 ign with wasted spark

Note that above setups would use boards populated different way: differentiated at PNP-time.

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Case relevant issues

It is very important to have IO buttons (how many?) on the box, having a keyboard in the car at all times is not practical. This also makes it possible to make a compact hand held tuner that can tune the ArmEfi and other VEMS frontier products. I guess it is the question of a free digital or analog input(s), and the rest is mechanical (case) issue.

MMC slot ?

* I think the MMC can live inside, without the possibility of removing (maybe soldered)

* anyone insisting on removable MMC slot ?

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This (armufo??) is a multi application board, it can be used for the following applications:

With (external ?) display and buttons:

* MAF replacement / MAF tuner.

* WBo2 Lambda meter (? why would someone use this instead of a standalone? maybe this is ment logger box with internal WBO2 controller )

* Boost controller.

* Exhaust temp meter.

* Additional fuel controller.

* Handheld tuner for ArmEfi and the other CAN enabled boards. I highly doubt that this would work. A logger and control board can be merged reasonably. A UI (user-interface) board cannot. (well, apexi makes profit from boost controllers made this way, but separated UI and controller is remarkably better).

* Entry level engine management system with integrated display (how?) and user interface.