MMC1 using subset of GPMC, or subset of MMC0 and GEMAC_CPSW

J Burke

Intellectual 350 points

Other Parts Discussed in Thread: AM3358

I'm trying to determine if two options cause any issues.

1st Option: MMC1 using subset of GPMC

I'm using the GPMC attached to an FPGA, and only really need addresses up to A7.

Can I use the MMC1 and GPMC up to A7?

2nd Option: Subset of MMC0

Can I use only data pins of MMC0 up to Dat3 and still use the GMII1 interface?

Ether one of these results in "conflicts" using the PinMux tool, but I'm wondering if either are ok anyway since I don't actually"need" the other pins.

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

Hi,

You haven't posted which processor you are using. Please post that and also post the pinmux dat files for both cases.

0 J Burke over 10 years ago in reply to Biser Gatchev-XID

Intellectual 350 points

AM3358.

Option1.dat

Option2.dat

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

J Burke said:
1st Option: MMC1 using subset of GPMC
I'm using the GPMC attached to an FPGA, and only really need addresses up to A7. Can I use the MMC1 and GPMC up to A7?

With this option you will be able to use both MMC1 and GPMC, but GPMC must be in 8-bit non-multiplexed mode.

J Burke said:
2nd Option: Subset of MMC0
Can I use only data pins of MMC0 up to Dat3 and still use the GMII1 interface?

Yes, this is a valid combination.

In both options I see no conflicts, just take care of the I/O voltages for each pin (VDDSHVx power rails).

Processors

Processors forum

MMC1 using subset of GPMC, or subset of MMC0 and GEMAC_CPSW