imx6ul eval kit - wrong ram size and cpu clock

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imx6ul eval kit - wrong ram size and cpu clock

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freewill78
Contributor I

Hello,

I have the MCIMX6UL eval kit and it suppose to have 4GB RAM and  696 MHz Cortex-A7 core.

However I cant verify it. It says 396MHz and DRAM is 512MiB

Please see the u-boot output below:

U-Boot 2015.04-imx_v2015.04_4.1.15_1.0.0_ga+gd7d7c43 (Apr 01 2016 - 10:00:09)

CPU:   Freescale i.MX6UL rev1.0 at 396 MHz

CPU:   Temperature 42 C

Reset cause: POR

Board: MX6UL 14x14 EVK

I2C:   ready

DRAM:  512 MiB

MMC:   FSL_SDHC: 0, FSL_SDHC: 1

*** Warning - bad CRC, using default environment

Display: TFT43AB (480x272)

Video: 480x272x24

In:    serial

Out:   serial

Err:   serial

switch to partitions #0, OK

mmc1 is current device

Net:   FEC1

Normal Boot

Hit any key to stop autoboot:  0

and this is the result for cat /proc/meminfo command:

root@imx6ul7d:~# cat /proc/meminfo

MemTotal:         507264 kB

MemFree:          398448 kB

MemAvailable:     383452 kB

Buffers:            5704 kB

Cached:            37504 kB

SwapCached:            0 kB

Active:            35136 kB

Inactive:          24892 kB

Active(anon):      16948 kB

Inactive(anon):      856 kB

Active(file):      18188 kB

Inactive(file):    24036 kB

Unevictable:           0 kB

Mlocked:               0 kB

HighTotal:             0 kB

HighFree:              0 kB

LowTotal:         507264 kB

LowFree:          398448 kB

SwapTotal:             0 kB

SwapFree:              0 kB

Dirty:                 0 kB

Writeback:             0 kB

AnonPages:         16816 kB

Mapped:            26832 kB

Shmem:               988 kB

Slab:               9100 kB

SReclaimable:       3296 kB

SUnreclaim:         5804 kB

KernelStack:        1144 kB

PageTables:         1040 kB

NFS_Unstable:          0 kB

Bounce:                0 kB

WritebackTmp:          0 kB

CommitLimit:      253632 kB

Committed_AS:      73052 kB

VmallocTotal:    1548288 kB

VmallocUsed:        4016 kB

VmallocChunk:    1367912 kB

CmaTotal:         327680 kB

CmaFree:          293840 kB

Labels (1)
1 Solution
893 Views
CarlosCasillas
NXP Employee
NXP Employee

Hi Mehmet,

Welcome to the Community!

On Table 1 of the i.MX 6UltraLite EVK Board Hardware User’s Guide is indicated that DRAM Memory is Micron 4Gb DDR3L SDRAM (4 Gb which means 512 MB).

Regarding operating frequency, the i.MX6UL family can run up to 696 MHz, but it depends of the family member. In case on the processor included on the EVK (MCIMX6G2CVM05AA), it could run up to 528 MHz, but the boot frequency is limited by Uboot. You could refer to the following thread if you want to operate the processor on its maximum frequency:

How to set imx6UL CPU to 528MHz in U-boot

Hope this will be useful for you.
Best regards!
/Carlos
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View solution in original post

2 Replies
893 Views
j_araya
Contributor II

Hi,

Page 4 of the Quick Start Guide suggests 4GB of RAM. So it seems to be wrong.

Thanks for the explanation.

Moises

0 Kudos
894 Views
CarlosCasillas
NXP Employee
NXP Employee

Hi Mehmet,

Welcome to the Community!

On Table 1 of the i.MX 6UltraLite EVK Board Hardware User’s Guide is indicated that DRAM Memory is Micron 4Gb DDR3L SDRAM (4 Gb which means 512 MB).

Regarding operating frequency, the i.MX6UL family can run up to 696 MHz, but it depends of the family member. In case on the processor included on the EVK (MCIMX6G2CVM05AA), it could run up to 528 MHz, but the boot frequency is limited by Uboot. You could refer to the following thread if you want to operate the processor on its maximum frequency:

How to set imx6UL CPU to 528MHz in U-boot

Hope this will be useful for you.
Best regards!
/Carlos
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
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