Can i.MX6ULL support NAND and SRAM?

[w2vy]

We are looking at the i.MX6ULL and want to boot from NAND Flash and use it for file storage but we also need to use EIM to access SRAM.

We will not be using Linux

Using the PIn Mux tool if we enable the NAND interface a number of address lines of EIM are not available.

Still available are:

eim_ad0-ad7

eim_addr18-24

eim_cs0,2,3

eim_data0-15

eim_lba

eim_oe

eim_rw

This seems to all but cripple using the EIM for anything other than very small I/O areas.

I hope I am missing something

Tom

[igorpadykov · Accepted solution]

Hi Tom

you are right, as there are no much alternate pin mux options

for both interfaces, as described in sect.4.1.1 Muxing Options,

Table 8-9. EIM IOMUX pin configuration i.MX6UL Reference Manual

http://www.nxp.com/docs/en/reference-manual/IMX6ULLRM.pdf 

If both interfaces are not used simultaneously one can consider to reconfigure

muxing in application, probably adding some isolation circuit, example of such

circuit can be found in p.13 spf-27452 i.MX6SL EVK schematic:

Schematics (2)
Design files, including hardware schematics, Gerbers, and OrCAD files. (REV 1)
i.MX 6SoloLite Evaluation Kit|NXP 

Best regards
igor
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