DDR2 Settings in AISgen Tool AM1808

Taqi Mustafa

Intellectual 890 points

Other Parts Discussed in Thread: AM1808

Where can i find help regarding settings related to DDR2 memory(on a custom board) during generating AIS image.

If you need any further information regarding the hardware, just let me know

over 11 years ago

0 Titusrathinaraj Stalin over 11 years ago

TI__Guru** 116100 points

Hi Taqi,

Please refer DDR spread sheet from the following TI wiki

http://processors.wiki.ti.com/index.php/Programming_mDDR/DDR2_EMIF_on_OMAP-L1x/C674x

0 Taqi Mustafa over 11 years ago in reply to Titusrathinaraj Stalin

Intellectual 890 points

I still don't understand how to calculate the address using that excel file ?

Am i suppose to enter these addresses ?

0 Shankari G over 11 years ago

TI__Mastermind 43955 points

Hi Taqi,

In the Bootloader app. notes of AM1808, http://www.ti.com/lit/an/spraba5c/spraba5c.pdf, you will find some information on DDR setting in section 5.3.4.

Regards,

Shankari

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0 Taqi Mustafa over 11 years ago in reply to Shankari G

Intellectual 890 points

Hi Shankari,

I have already read this section before.

"Values entered for each DDR register are directly programmed to the corresponding register by the
bootloader."

This section is only describing the purpose of these register. But i want to know from where can i calculate the address that is to be entered in the required memory registers ?

0 Taqi Mustafa over 11 years ago in reply to Taqi Mustafa

Intellectual 890 points

Hi Stalin,

Thank you for referring that excel file, Finally figure out where the register values are. Now i'm working out how to insert the valid values. I will let you know if i stuck at any point.

0 Taqi Mustafa over 11 years ago in reply to Taqi Mustafa

Intellectual 890 points

In the spread sheet, what are the below field for ?

IBANK_POS
DDRDRIVE1
DDR2EN
DDRDRIVE0
TIMING_UNLOCK
LPMODEN
MCLKSTOP_EN
SR_PD
T_ODT
EXT_STRBEN
PWRDNEN

0 Titusrathinaraj Stalin over 11 years ago in reply to Taqi Mustafa

TI__Guru** 116100 points

Hi,

This are the fields used in SDCR register (SDRAM configuration register) for programming the DDR2/mDDR controller for attached your mDDR/DDR2 memory.

From TRM Section 15.4.3,

The SDRAM configuration register (SDCR) contains fields that program the DDR2/mDDR memory
controller to meet the specification of the attached DDR2/mDDR memory. These fields configure the
DDR2/mDDR memory controller to match the data bus width, CAS latency, number of internal banks, and
page size of the attached DDR2/mDDR memory. Writing to the DDRDRIVE[1:0], CL, IBANK, and
PAGESIZE bit fields causes the DDR2/mDDR memory controller to start the DDR2/mDDR SDRAM
initialization sequence.

Please refer AM18xx Technical reference manual to know in detail.

http://www.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=spruh82a&fileType=pdf

0 Taqi Mustafa over 11 years ago in reply to Titusrathinaraj Stalin

Intellectual 890 points

I have matched the

data bus width
CAS latency
number of internal banks
page size

But i don't know what that control registers are for, so i have used the default setting.

Processors

Processors forum

DDR2 Settings in AISgen Tool AM1808