using SGPIO on 433x xplorer possible?

[lpcware]

Content originally posted in LPCWare by joco on Thu Sep 12 00:06:59 MST 2013
Hi Experts,

I would like to use the SGPIO module on the devboard 433x-Xplorer. I'd need to input 8bits data
with and external clock. I wanted to use SGPIO0..SGPIO7 for data input and SGPIO8 as clock, but
then I looked at the schematic and have found, that some SPGIO lines are also connected to the
ethernet phy chip (LAN8720). Four lines are connected (RX TX etc), plus SGPIO7 is the ETH_RST# line.
To me it seems, that these lines are going to be driven by lan chip anyway. If I pull down the ETH_RST#,
then I cannot use SGPIO7.

Could someone confirm that I am right, or tell me how to use those pins as SGPIO?

In case I am right, I just don't understand, why those lines are on the header pins when they are
unusable.

Can someone clarify this?

Thanks in advance.

Joco

[lpcware]

Content originally posted in LPCWare by joco on Fri Sep 13 22:35:43 MST 2013
Hi,

Well, P1_0 is pinned out to left side pin 27, it's called GPIO0[4] but still, this is the sgpio7 line. The problem is that this line drives the lan chip RESET pin, too. The same way, other sgpio lines are connected to the lan chip and the pin header too. I am quite confident now, that these lines conflicting with the lan chip. I have checked. At least the input lines (E_RXD1, E_RXD0 and E_CRS_DV) are constanttly driven by the lan chip.
So the question again. Why are they pinned out if they are used by the lan chip? Makes no sense.

Joco

[lpcware]

Content originally posted in LPCWare by JohnR on Fri Sep 13 06:38:09 MST 2013
Hi,

The number of SGPIO lines available is limited by the device size.

For instance, to use SGPIO7 on the NGX Xplorer board, which seems to use the BGA100 version of the LPC4330, there seem to be only two pins that can be used as SGPIO7, P1_0 and P2_6. Neither of these pins seem to be pinned out according to the card schematic, if I have read the documents properly.

I think you may have to use a card with a larger device, e.g. the LGBA256 to get the number of SGPIO lines you need.

JohnR