We are developing a custom board, based on the G120, and I need to clarify pin 07 (P2_11). The assumption is that this is a GPIO pin - the user manual has no notes of info for that pin, so our assumption is based on that.
We are using a Molex 104168-1620 combo SIM/SD connector that has a S/W pin, for Card Inserted detection, and are planning to use the same pin, 07.
Based on the schematic from the Cobra ||| , where this pin is used for the CDN (not sure if that is the Card Detection Switch or logic) we are hoping to use the same pin.
Can anyone confirm that all is good on this, or if we should avoid using the 07 pin?
I have done a rather exhaustive examination of all signal lines on the CobraIII and their connection to the G120 SoM and to the newly-released GXP Gadgeteer Bridge.
Port P2.11 has no defined D## designation, no associated signal name, and goes only to pin 7 on the G120 SoM to the MicroSD connector, pin 9.
This site shows two pin outs, one for the SD mode and one for the SPI mode. In either mode, the function of MicroSD connector pin 9 is not shown in the referenced URL. In my own documentation, I show ??? for the function of pin 9 of the MicroSD connector.
Then at the following URL, I found the scary info tabulated below:
SD
Pin SpecName Spec Description GHI Signal Name
--- -------- ---------------- ---------------
1 CD/DAT[3] Data line 3 SD.D2
2 CMD Command line CMD SD.D3
3 VSS1 Ground SD.CMD
4 VDD Supply voltage VDD Vcc
5 CLK Clock SD.CLK
6 VSS2 Ground GND
7 DAT[0] Data line 0 SD.D0
8 DAT[1] Data line 1 or SD.D1
interrupt (optional)
9 DAT[2] Data line 2 or SD.CDN
Read Wait (optional)
Something is not right on the pin outs shown on the CobraIII schematic for the MicroSD connector or the signal names there affixed.