| Variable |
Number |
Details |
| Analogue 0-5V inputs |
11 |
Each is 0 – 5.5V, 55k input impedance
- 2 x TPS / pedal position
- 6 x pressure – Oil, Fuel, Internal intake MAP, internal exhaust MAP, external intake MAP, external exhaust MAP
- 3 x spare for servo feedback / external inputs
|
| Analogue oxygen sensor inputs |
2 |
Each can be either:
- 0 – 5.5V, 55k input impedance
- 0- 3.3V, 1M input impedance
|
| Temperature inputs |
4 |
Each is 0 – 5.5V, 55k input impedance to ground
Each can be:
- Non-biased, eg in piggyback mode. Calibration is in mV
- Biased, calibration is in Ohms. 3 internal pull-ups, 1k5, 2k2, 4k7, automatically selected by the ECU
Manifold air temperature, coolant temperature, oil temperature, fuel temperature |
| Crank trigger inputs |
3 |
- Selectable 2k2 pullup (on in digital mode, off in reluctor mode)
- Variable voltage trigger threshold from 0 to 65V – either arm input for reluctor or threshold for digital input
- AC coupled zero crossing trigger in reluctor mode
- Variable filtering 1 to 192 µs
- See built-in scope section
|
| Vehicle speed input |
1 |
- Selectable 2k2 pullup
- Variable voltage trigger threshold from 0 to 65V
- Variable filtering 1 to 192 µs
- See built-in scope section
|
| Sensor power and ground |
|
- 5V regulated output for sensors, max 100 mA, current limited (voltage is monitored by ECU)
- Sensor ground connected to ground inside ECU under firmware control to detect external ground loops in the wiring (voltage is monitored by ECU)
|
| Knock inputs |
1 |
- 50 k input impedance
- Sampled at 80 kHz (12-bit resolution, 3.3V peak to peak max voltage),
- Variable second order highpass and lowpass filters
- Selectable start and end of sampling windows (in crank angle)
|
| Wired Outputs |
2 |
- Dedicated outputs for tacho and EFI relay
- Tacho output has inductor to generate back-EMF spike for impulse tachometers.
- EFI relay output can be configured as fuel pump or EFI relay. Switches to ground, current limited to 600 mA
|
| Headphone output |
1 |
Mono output, can be selected as direct knock input or filtered knock input |
| Power sources |
3 |
ECU can be powered by 12V EFI input, ignition switch, or USB (USB for settings / firmware upgrades / log retrieval only; 12V must be applied to read inputs) |
| CAN channels |
2 |
- Up to 1 Mbps
- Internal 120 Ohm terminating resistor can be turned on and off with ECU setting on each channel
|
| USB connection |
1 |
- Standard USB mini AB connector.
- 12 Mbps max speed
- USB appears as mass storage device (USB stick); no drivers are necessary
- Software installer included on mass storage device
|
| Serial connections |
4 |
- All 4 use 4-pin Molex connectors
- 2 x serial in (ground, transmit, receive)
- 1 x serial out (ground, transmit, receive)
- 1 x controller out (ground, transmit, receive and 12V switched, current limited power) – eg for dash, hand controller
|
| Wireless connection |
1 |
- Access point
- 230kbps max speed
- Settings and live data only (no log retrieval due to speed)
|
| Inbuilt sensors |
|
- Microphone
- 3 axis accelerometer
- 3 axis rate gyro
|
| Inbuilt logging |
32 MB |
- Max 30 hrs @ 10 Hz, 13 channels
- Min 20 mins @ 100 Hz, 125 channels
|
| Exception (fault) detection |
16 MB |
Separate logging memory for storing logs during “exceptions” (sensor / trigger faults etc) |
| Built-in scope |
4 channels |
- Max sample rate 200 kHz (5µs sample period)
- 1000 samples per screen (min 5ms across the screen)
- Analogue trigger inputs sampled at 40 kHz
Channels include
- Analogue CAS inputs
- Peak detected CAS voltages
- CAS threshold voltages
- Filtered CAS inputs
- Analogue external inputs
- Raw and filtered knock waveforms
- Current engine angle
- Calibrated input values
- Intermediate calculation values
- Output calculated values
|
| Main loop execution speed |
|
Variable depending on tuning mode and corrections enabled, 400 Hz nominal |
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