Re: MY03 STI ECU pin outs
Posted: Wed Jun 27, 2012 6:53 pm
Gents,
Sorry about the confusion that the AN numbers continue to create. It is on the ToDo list to rename the pins in the I/O Config....
The naming convention on the S6 differs to the S8 because of the capabilities. On the S8 all of the first 16 inputs are equally capable, but this capability and flexibility has a cost associated with it, and for most of the time is more than is actually needed. Consider, for a moment, that a Bipolar type input needs a pair of DACs to generate the configurable thresholds needed to feed the two comparators which feed the FPGA for signal detection. We can lose the DACs (and save the customer some money) by hard-wiring the thresholds with resistors; what we end up with is an input that can still detect speed signals but is better suited to unipolar type signals such as hall effect or optical sensors. We can also delete the comparators and threshold circuitry for signals that don't need speed measurement; a TPS or MAP sensor doesn't need a hardware trigger to flag it is over or under a threshold; software can do that. More savings to pass on to customers
We ended up with four lots of four pins, each lot having different capabilities. To try to make it easier to remember we came up with AB (Analog, Bipolar), AU (Analogue, Unipolar), AV (Analogue, Voltage) and AR (Analogue, Resistive). You don't inadvertently connect your temp sensor to AN10 because you're looking at AV2 and can immediately see it is not suitable. That was the theory And the plan was that in the I/O config the pins should be named the same way.... and they will be.... some time
Tim,
Our pin numbering convention does not follow Subaru's since they don't appear to be able to make their minds up or indeed get it right. For the most part the number of pins per plug is not constant ergo I chose A as the plug with the most pins, B the next most etc. There are exceptions, BUT, the page gives the pin locations as well as descriptions so it is hard to get it wrong. With regard to the JDM wiring, that turns out to be a misnomer. It should read Immobilisier / Non-Immobiliser. You only need to invoke the "JDM" option when plugged into JDM vehicles devoid of a factory immobiliser. I don't recall having had a problem with the A/C on such vehicles.
Cheers,
Pat.
Sorry about the confusion that the AN numbers continue to create. It is on the ToDo list to rename the pins in the I/O Config....
The naming convention on the S6 differs to the S8 because of the capabilities. On the S8 all of the first 16 inputs are equally capable, but this capability and flexibility has a cost associated with it, and for most of the time is more than is actually needed. Consider, for a moment, that a Bipolar type input needs a pair of DACs to generate the configurable thresholds needed to feed the two comparators which feed the FPGA for signal detection. We can lose the DACs (and save the customer some money) by hard-wiring the thresholds with resistors; what we end up with is an input that can still detect speed signals but is better suited to unipolar type signals such as hall effect or optical sensors. We can also delete the comparators and threshold circuitry for signals that don't need speed measurement; a TPS or MAP sensor doesn't need a hardware trigger to flag it is over or under a threshold; software can do that. More savings to pass on to customers
We ended up with four lots of four pins, each lot having different capabilities. To try to make it easier to remember we came up with AB (Analog, Bipolar), AU (Analogue, Unipolar), AV (Analogue, Voltage) and AR (Analogue, Resistive). You don't inadvertently connect your temp sensor to AN10 because you're looking at AV2 and can immediately see it is not suitable. That was the theory And the plan was that in the I/O config the pins should be named the same way.... and they will be.... some time Tim,
Our pin numbering convention does not follow Subaru's since they don't appear to be able to make their minds up or indeed get it right. For the most part the number of pins per plug is not constant ergo I chose A as the plug with the most pins, B the next most etc. There are exceptions, BUT, the page gives the pin locations as well as descriptions so it is hard to get it wrong. With regard to the JDM wiring, that turns out to be a misnomer. It should read Immobilisier / Non-Immobiliser. You only need to invoke the "JDM" option when plugged into JDM vehicles devoid of a factory immobiliser. I don't recall having had a problem with the A/C on such vehicles.
Cheers,
Pat.
