Mity CPU Platforms » MitySOM-335x (ARM Cortex-A8 Based Products)

03/26/2013

MW 07:12 PM PCB Development: RE: VBACKUP Current Draw

Mark,
Great catch! This is certainly acceptable, and we'll likely modify either our u-boot code or kernel code to disable these pull-downs. Both pins are tied externally (BOOT1 to VRTC via 10K, Boot0 to ground), so there is no need ... Michael Williamson

05:54 PM PCB Development: RE: VBACKUP Current Draw

Mike,
I tested the AM3354 DDR3 module here as well and also saw the ~10uA current draw on VBACKUP.
One other thing I tried worked for me in lowering this current. On your module, it appears that you have the PMIC BOOT0 input tied ... Anonymous

MW 05:25 PM PCB Development: RE: VBACKUP Current Draw

Hi Mark,
For the DDR2 modules, I'm pretty sure you need the -1C revision for the fix. However, the AM3354 DDR3 module should have the RTC fix already applied. I tested the first prototypes here and was able to see 10 uA on them as o... Michael Williamson

05:07 PM PCB Development: RE: VBACKUP Current Draw

Hi Mike,
Thanks for the quick response. I believe I have modules covered in the errata. Of the three modules I've tested with, one is an 80-000444RC-1-D and the other two are 80-000509RL-1B.
I also have one of the AM3354 DDR3 mod... Anonymous

MW 04:08 PM PCB Development: RE: VBACKUP Current Draw

Hi Mark,
We need to confirm what revision of module you have (there was Errata on earlier modules where the VBACKUP draw is quite high). Can you please get the 80- number off the module?
Check the "Module Revision History Page":ht... Michael Williamson

03:54 PM PCB Development: VBACKUP Current Draw

I am attempting to replicate the VBACKUP current draw information you supplied in the Hardware Design section of the wiki. I have a 3359-GX-226-RC module on the MityARM development board. I removed the battery (which was dead by the wa... Anonymous

03/11/2013

MK 09:02 PM Software Development: RE: Yocto in the future?

Mike,
I *think* the kernel source were coming from Critical Link's git repo - this line is in the linux-mityarm-335x_3.1.bb file:
@SRC_URI = "git://support.criticallink.com/home/git/linux-mityarm-335x.git;protocol=git;branch=${BRAN... Michael Karasoff

MW 08:26 PM Software Development: RE: Yocto in the future?

Right,
If I read you correctly, you will need to modify the Yocto recipe to use our kernel URL and not Yocto's. This is because the Yocto kernel sources (or anyone else's at the moment, until we upstream stuff) does not have a MACHIN... Michael Williamson

MK 04:45 PM Software Development: RE: Yocto in the future?

Mike,
Thanks again for your quick response.
In Yocto, I've been setting following environment variables in my local.conf:
GCCVERSION = "4.5%"
BINUVERSION = "2.20.1"
I have used pretty much the same BSP in Yocto as for Angstrom... Michael Karasoff

MW 07:28 AM Software Development: RE: Yocto in the future?

I don't know why the SDK toolchain isn't working. Are you sure that the .config file was not altered, specifically, the MACHINE type? That would definitely cause problems. Are you using the kernel and u-boot code from our site, or fro... Michael Williamson

MK 07:08 PM PCB Development: Any Experience with VSC8641 PHY?

We are building a system with extended low temperature range (below 0C) and see that the VSC8601 PHY only goes to 0C.
Vitesse also has an 8641 part with extended temperature range, which appears to be quite similar to the VSC8601, exc... Michael Karasoff

03/08/2013

MK 05:35 PM Software Development: Yocto in the future?

Up until a week or so ago, we were developing MityARM-335x code under Angstrom as a holdover from work done on Beaglebone w/ Angstrom. We built the filesystem, kernel, and uboot using recipes posted on the Critical Link Wiki, and - once... Michael Karasoff

02:39 PM Software Development: RE: MityArm in u-booting from SPI flash

Thanks Tim,
How hard to you think it would be to merge the MityArm changes for u-boot into the latest mainline u-boot?
John C. Anonymous

TI 02:28 PM Software Development: RE: MityArm in u-booting from SPI flash

John
While the omap l138 based mity SOMs do boot from SPI (NOR) flash, we have not tried to do so on the AM335X based SOMs.
In fact, the current AM335X based SOMs can not boot from on-board flash due to pin mux constraints. You should ... Tim Iskander

02:12 PM Software Development: MityArm in u-booting from SPI flash

Does Critical Link plan to support booting from spi flash? We would like to begin the process of migrating the booting
over to spi flash and were hoping you guys might have it ready to go already (fingers crossed...) We understand that
... Anonymous