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SDRAM ON STM32F439I-EVAL2

stdavod
Associate II
Posted on October 15, 2014 at 14:54

Hi

I try find datasheet SDRAM on this board but I can't find it.

I want Row Address Input and Column Address Input .

please help me.

#lmgtfy
14 REPLIES 14
Posted on October 15, 2014 at 16:57

http://www.micron.com/~/media/Documents/Products/Data%20Sheet/DRAM/64mb_x32_sdram.pdf

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stdavod
Associate II
Posted on October 15, 2014 at 17:58

0690X00000605B3QAI.png

MT48LC2M32B2 is 2 Meg x 32 (512K x 32 x 4 banks)

but my board is 8 M x 32-bit SDRAM (page 6 from DM00093454.pdf)

where is different?

Posted on October 15, 2014 at 18:24

This is an 8MByte part, externally marked as D9GZQ on my early STM324x9I-EVAL

If you have a different part you'll need to express what markings you see on it, as I can't determine this through osmosis.
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Posted on October 15, 2014 at 18:31

From the

http://www.st.com/web/en/catalog/tools/PF259094#

http://www.issi.com/WW/pdf/42-45S32800G.pdf

http://www.micron.com/parts/nor-flash/parallel-nor-flash/m29w128gl70za6e

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Posted on October 15, 2014 at 18:41

UM1668 on the schematics states MT48LC4M32B2 which is 1 Meg x 32 x 4 Banks.

What a mess.

JW
Posted on October 16, 2014 at 10:16

It seems that is a typo error in Eval board user Spec (DM00093454.pdf), the correct information should be 8Mbytes SDRAM, 2Meg x 32-Bits.

Regards,

Heisenberg.

stdavod
Associate II
Posted on October 16, 2014 at 12:17

For Initialize the SDRAM controller .

What

gpios

should

I use?

What

registers

should

I use?

which pins on IS42S32800G connect to which gpios on stm32f439 microcontroller?

please help me.

Posted on October 16, 2014 at 12:52

Follow the schematics in UM1668.

Tables 25 and 26 (the layout of memory connectors CN11 and CN12) may help too.

JW

stdavod
Associate II
Posted on October 16, 2014 at 13:40

With

my own

eyes

I

saw

the

writing

on the

board

(IS42S32800G =8M x 32bit=2Meg฀ x฀ 32฀ bit฀ x฀ 4฀Banks)

but page 45 on DM00093454.pdf is for MT48LC4M32B2B5-7.

now what can we do?