AMP EFI MS3Pro - 3 Ms3 Pro Hardware; Overview

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3 MS3PRO HARDWARE

3 MS3Pro hardware

3.1 Overview

The MS3Pro is a full standalone ECU with everything you need to run sequential fuel injection on up to 12 cylinders.

This ECU is based on the previous MegaSquirt-III design and runs similar code, but we’ve miniaturized the system

to ﬁt into a smaller package, and put it in a waterproof enclosure with high current, vibration resistant AMPSEAL

connectors. Here are the MS3Pro’s speciﬁcations.

Hardware features:

• Freescale MC9S12X 16 bit, 50 MHz asymmetrical dual core processor

• 10 saturated injector drivers

• 8 logic level ignition outputs

• 3 high current (5 amp) general purpose outputs - 2 can be reconﬁgured as additional injector drivers

• 3 medium current (3 amp), high frequency general purpose outputs

• 1 stepper H-bridge driver

• Camshaft and crankshaft differential inputs - supports VR, Hall effect, and optical input

• 12 volt tach output

• Fuel pump output

• 8 analog inputs (5 dedicated sensor inputs, 3 general purpose)

• 4 general purpose on/off or low frequency inputs

• 3 general purpose frequency inputs (can be repurposed as low current 5V outputs)

• 2 DSP based knock inputs

• RS232, USB 2.0, and CAN communication

• Onboard SD card for internal data logging

• Internal ECU temperature sensor

• Real time clock

• Temperature range: -30 to +80 degrees C (-40 to +85 without battery for real time clock)

• Minimum supply voltage: 6.0 volts

• Maximum supply voltage: 22.0 volts before triggering overvoltage protection circuits

Software features:

• Supports speed density, alpha-N, or MAF based fuel and spark tables with option to blend between any two

load types

• 1 microsecond injector pulse width resolution

• Tables for nonlinear injector behavior at small pulse widths

• Allows blending multiple load types, including specialized mode for independent throttle bodies

• Supports a wide variety of OEM cam and crank position sensors

• Individual cylinder trim tables for fuel and ignition

• Accelerator pump or model based acceleration enrichment

AMP EFI MS3Pro manual version 1.202, ﬁrmware 1.5.0, 4/21/2017 Page 22