G4X PlugIn Key Features (where applicable):
Up to 6D fuel and ignition mapping
Precision closed loop cam control (four cam, independent control)
Sequential fuel delivery
Digital triggering, all OEM patterns
OEM idle hardware supported
5D boost control with three switchable tables
Motorsport features - antilag, launch, flat shift
Continuous barometric correction (on board)
CAN port
QuickTune - automated fuel tuning
Individual cylinder correction
USB tuning cable included
Stats recording into on-board memory
Gear compensations for spark, boost and fuel
Real time selectable dual fuel, ignition and boost maps
Sync and crank sensors can be a combination of Hall effect, variable reluctance or optical
Boost control referenced to gear, speed or throttle position
512 mega bytes data logging memory
Staged injection
Knock with "windowing"

I/O Expansion Options
The Toyota Supra plug-in ECU has two expansion connectors. 
From PCB revision 1.2: 

Expansion Connector 1::  
Gnd                Sensor Ground Only  
+5V Out        Low Current +5V Supply 
An Volt 7        Analog 0-5V input 
An Volt 6        Analog 0-5V input 
An Temp 4        Temperature sensor input 
An Temp 3        Temperature sensor input 
DI 8                Digital input 
DI 7                Digital input 

Expansion Connector 2  
Gnd                Sensor Ground Only  
+5V Out        Low Current +5V Supply 
Aux 9                EThrottle - can't be used as an Aux Out 
DI 9                Digital input 
DI 10                Digital input 
An Volt 8        Analog 0-5V input 
An Volt 9        Analog 0-5V input 
An Volt 10        Analog 0-5V input 

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