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MicroSquirt Module – V2.2M
January, 2009
BG Soflex, LLC
www.microsquirt.info
V2.1 Version Shown Here
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MicroSquirt Module MicroSquirt encapsulates pretty much everything that MegaSquirt has
to offer, in a board the size of a business card. It would be nice to have this package for a true DIY setup…
For real engine experimenters, the MicroSquirt PCB is offered in a module format: The exact same circuit of MicroSquirt is used (except ignition drivers, its logic-
level output only on the module).
Ampseal is replaced with a 0.1” header, two rows of 25 pins (J2). All I/O are present on this header. Easy-to-source solution.
Additional processor I/O brought out on 2x5 header (J1).
Module size is 2.4 inches X 3.5 inches – credit-card sized!
Complete, tested module loaded with embedded Engine Control Firmware.
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J2 Header(0.150, 2.945)
(0.2, 0.205) (2.2, 0.205)
(2.2, 3.31)
(1.8, 3.31)
All DimensionsIn Inches
Mounting Locations for Module
All Finished Hole Diameters
Are 0.125”
J1 Header(1.0, 0.205)
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Pin 1,2 - +12V Battery
Pin 3 – MAP
Pin 4 - Serial Rxout
Pin 5 – Coolant
Pin 6 – Serial Txout
Pin 7 – AccelLED/GPIO
Pin 8 – Bootload
Pin 9 – MAT
Pin 10 – CANH
Pin 11 – WarmLED/GPIO
Pin 12 – CANL
Pin 13 – TPS
Pin 14 – VR in2(+)
Pin 15 - Vref
Pin 16 – SpareADC2/MAF
Pin 17 – SpareADC1
Pin 18 – FLEX
Pin 19 – Opto in(+)
Pin 20 – Fidle
Pin 21 – Opto In(-)
Pin 22 – Fpump
Pin 23 – VR In1(+)
Pin 24,26,28,30,32 – Inj1
Pin 25 – VR In(-)
Pin 27 – O2
Pin 29 – Tachout
Pin 31 – SensorGND
Pin 33,35,37,39,41,43,49 – PowerGND
Pin 34,36,38,40,42 – INJ2
Pin 44,46 – IGN2
Pin 48,50 – IGN1
Module J2 Pinout
See MicroSquirt documentationfor signal descriptions:
http://www.microsquirt.info
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Pin 1 – PA0
Pin 2 – PE1
Pin 3,5 - Gnd
Pin 4 - Alt-INJ1
Pin 6 – Alt-INJ2
Pin 7 – PT7
Pin 8 – Alt-CAM
Pin 9 – PT6
Pin 10 – IACEnbl
Module J1 Pinout
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MicroSquirt Module I/O Header is standard .100” (2.54mm) size, 2 rows of
25 pins (50 total circuits). Unpopulated.
Example receptacle header – Tyco/Amp 7-534206-5
Matching pin header – Tyco/Amp 9-146254-0-25
Standoffs are 7/16”, 1/4” Hex with 4-40 screws (Fascomp FC2103-440-A).
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MicroSquirt Module MicroSquirtModule is designed to be plugged into a Motherboard
arrangement. This allows you to design your own custom PC board with any connector and accessory options you would like – here are some ideas: USB connectivity
Bluetooth or Zigbee Wireless
On-board MAP and Baro sensors
On-board signal stimulator
Use of WBO2 modules
Connector for direct plug in (EEC-IV, L-Jet, GM, etc.)
Multiple modules for redundant setups, auxiliary fuel injectors, dual-fuel setup (gasoline+CNG), extended GPIO, etc.
….its up to you!
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MicroSquirt Module – Eval Board The MicroSquirt Module Experimenter’s board:
Mounts MicroSquirt module, breaks out all signals to screw terminals. For test and evaluation of the MicroSquirtModule.
Provision for MAP sensor, Serial DB9, and selection DIP switches.
Large user prototype area and user circuit for PIC18F processor, CAN, LEDs, serial transceiver, 5V power supply.
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