Suitable DRAM

Started by Dan N in comp.arch.embedded14 years ago 2 replies

Can someone suggest to me a suitable DRAM manufacturer and package. I've been looking at an Epson VGA controller for an embedded...

Can someone suggest to me a suitable DRAM manufacturer and package. I've been looking at an Epson VGA controller for an embedded application. It specifies either FPM-DRAM or EDO-DRAM, 1M x 16 bits. Can you even get DRAM that small these days? Would it be possible to substitute SDRAM or is it a different configuration? Dan


LH7A400 Evaluation Board

Started by Heiner Karlin in comp.arch.embedded14 years ago 1 reply

Hello, Does anybody know an evaluation board for the LH7A400 Controller, except the Logic PD Zoom card engine kits? I am looking for a...

Hello, Does anybody know an evaluation board for the LH7A400 Controller, except the Logic PD Zoom card engine kits? I am looking for a board with SRAM instead of SDRam, to test to which level power consumption can be brought. Thanks for all hints. H. Karlin


Xilinx Virtex5 ILOGIC LOCations

Started by SCO in comp.arch.embedded12 years ago

Hi, I have generated a DDR2 SDRAM interface with MIG2.0. It gave me a nice project but I have to change the pin locations. After I make...

Hi, I have generated a DDR2 SDRAM interface with MIG2.0. It gave me a nice project but I have to change the pin locations. After I make the necessary changes I see that I have to tweak the ILOGIC, IODELAY element locations also. They have location names like ---------------------------------------------------------------------- INST "*/gen_dqs[0].u_iob_dqs/u_iddr_dq_ce" LOC = "ILOGIC_X0Y30...


LPC3180 ARM uC power supply

Started by kalyanamsaritha in comp.arch.embedded12 years ago 11 replies

LPC3180 is a ARM926EJS core which uses a 1.2V for the core, sdram, etc, and 1.8V/3.0V for IO. What power supply/regulators would be...

LPC3180 is a ARM926EJS core which uses a 1.2V for the core, sdram, etc, and 1.8V/3.0V for IO. What power supply/regulators would be recommended? Would a single regulator be recommened to achieve these multiple voltages? And how? Thanks.


BlackFin BF531 and MT48LC4M16

Started by Jookie in comp.arch.embedded10 years ago 11 replies

Hello, this is a question to guys with some experience with AD BlackFin BF531 (or BF533) - normally I would ask on blackfin.org, but it was...

Hello, this is a question to guys with some experience with AD BlackFin BF531 (or BF533) - normally I would ask on blackfin.org, but it was shut down some time ago... Anyway... I've connected MT46LC4M16 (1 Meg x 16 x 4 banks) SDRAM to my BF531, I've initialized it (although I'm not sure about those settings), but I got some issues with it. According to datasheet of BF531 the smallest possib...


ARM S3C24x0 based development kits ?

Started by leon20008 in comp.arch.embedded12 years ago 3 replies

Hi friends, for an experimental project we shall need an ARM9 based development kit, with the SDRAM of at least 64M, ethernet, audio and...

Hi friends, for an experimental project we shall need an ARM9 based development kit, with the SDRAM of at least 64M, ethernet, audio and LCD connection. I have been looking around for a long time and found nothing exactly meets my requirement. Since you guys have much more experiences in this area than me, would you please give me some advice and recommendation? thanks a lot! Leon


VGA/SVGA controller

Started by Dzun in comp.arch.embedded9 years ago 7 replies

Hi all, I'm looking for some card/device to display text/graphics on my LCD - data source is small arm uP. I found some module from Mylium (LAVA...

Hi all, I'm looking for some card/device to display text/graphics on my LCD - data source is small arm uP. I found some module from Mylium (LAVA 10 www.mylium.es) - and I'm wondering if anyone had an experience with it? Is it really 800x600? I can't display lower resolution than this on my monitor.Can I reprogram it (it's based on FPGA)? How can I use the onboard SDRAM? Are there any other solut...


Basic DVI example?

Started by Colin Anderson in comp.arch.embedded16 years ago 1 reply

Has anyone here worked on or have run across a hobbyist-scale project using DVI video/graphics? I would like to experiment with a...

Has anyone here worked on or have run across a hobbyist-scale project using DVI video/graphics? I would like to experiment with a DVI transmitter fed by a dedicated SDRAM framebuffer, but I do not know where to start. My experience is with PIC- and SX-based projects, but I'm about to start working with FPGA projects. Any advice is appreciated!


MCF5270 versus MCF5208

Started by okalex in comp.arch.embedded13 years ago 1 reply

Hello all, I'm trying to choose a microprocessor for a new design and would like to get input from members of the community who have used...

Hello all, I'm trying to choose a microprocessor for a new design and would like to get input from members of the community who have used these processors. The requirements are an Ethernet MAC (PHY would be nice, but haven't found a chip which meets this plus the other requirements), I2C, external memory bus to access 4MB SRAM (or SDRAM) buffer, hobbyist-friendly packaging (not BGA, prefe...


boot.bin code from Atmel

Started by DavidP in comp.arch.embedded14 years ago 1 reply

I am having problems building a working boot.bin from the code downloaded fromn the Atmel site. I need to make a change to the sdram...

I am having problems building a working boot.bin from the code downloaded fromn the Atmel site. I need to make a change to the sdram controller initialization. I've tried using GCC 2.95.3 and 3.4.4. using 3.4.4 I get a "Data Abort detected" message when it starts up. Any help would be greatly appreciated! Thank you!


MPMC On EDK

Started by ratemonotonic in comp.arch.embedded12 years ago

Hi All , I am trying to interface microblaze with a Micron DDR SDRAM (MT46V16M16FG-75 16Mx16) using MPMC from the IP catalogue. As I...

Hi All , I am trying to interface microblaze with a Micron DDR SDRAM (MT46V16M16FG-75 16Mx16) using MPMC from the IP catalogue. As I am running on Spartan 3 FPGA I need to connect port lines - DDR_DQS_DIV_O and DDR_DQS_DIV_I , else I get errors , it also states that these should be connected in for spartan 3. The problem is that there is not much documentation about these port lines in ...


How to add some SDRAM to a FPGA board ?

Started by whygee in comp.arch.embedded11 years ago 25 replies

Hello, I thought that I could ask for advices on this group since most high-end embedded CPU have the same constraints. I would like to add...

Hello, I thought that I could ask for advices on this group since most high-end embedded CPU have the same constraints. I would like to add a good RAM capacity to existing evaluation/development boards equiped with 2.54mm pins. Ideally that would mean 32 or 64MB with a 16-bit datapath (32-bit would be too wide, too many wires...). SRAM are not possible, the largest I have are 36Mbits in...


AT91RM9200 linux woes

Started by roboman152 in comp.arch.embedded14 years ago 2 replies

Ok So Im to the point I dont know what to try next. Im trying to bring my custom AT91RM9200 board to life. I have 16MB of SDRAM on CS0 (starting...

Ok So Im to the point I dont know what to try next. Im trying to bring my custom AT91RM9200 board to life. I have 16MB of SDRAM on CS0 (starting at 0x20000000 ending at 0x21000000) and 2MB of data flash at 0xC0000000. First step was getting uBoot running. Which for some reason if I stick uBoot (1.1.4) as resident and try and let it relocate itself it wont run, no serial output. So I stuck with t...


Laying out ddr traces

Started by Simon in comp.arch.embedded8 years ago 7 replies

So, I'm trying to attach some DDR SDRAM to a blackfin DSP. It's the first time I've tried to lay out DDR, and I'm not finding it easy-going......

So, I'm trying to attach some DDR SDRAM to a blackfin DSP. It's the first time I've tried to lay out DDR, and I'm not finding it easy-going... Here's an image of the left side of the DSP and the entire DDR chip... http://0x0000ff.com/imgs/eagle/bga-ddr.png. In line with what I've been reading, I was trying to get CK,/CK laid out first, then sync up address[0:15], ba[0:3], /RA


Kernel panic / page fault help

Started by roboman152 in comp.arch.embedded14 years ago 1 reply

Hi, Im a newb to working at this level with the kernel. (mainly a hardware guy) Anyways im trying to get 2.6.14 to run on my custom board. Ive...

Hi, Im a newb to working at this level with the kernel. (mainly a hardware guy) Anyways im trying to get 2.6.14 to run on my custom board. Ive got 16MB of SDRAM and 2MB of Dataflash, it enters the kernel but page faults, below is the whole nitty gritty, any suggestions on what could cause this/ were to look for a solution? U-Boot 1.1.2 (May 17 2006 - 15:46:16) U-Boot code: 20F00000 ->


PSRAM is SDRAM , but at .00007 amps !

Started by werty in comp.arch.embedded13 years ago 1 reply

The M 69 AW 024 2 megaByte DRAM is so low power , they did not want to call it DRAM , so they tagged it ...

The M 69 AW 024 2 megaByte DRAM is so low power , they did not want to call it DRAM , so they tagged it PSRAM All the transistor methods are pulling about same milliwatts/megahertz , so CMOS is same as DRAM . CMOS at 50Mhz gets hot ! So why not just use DRAM !! Besides , 2MegaBytes is impossible ,in CMOS at that price and density ... ...


Maximum Memory Usage?

Started by Ahmed Samieh in comp.arch.embedded13 years ago 8 replies

Hello all on RTOS like ST20 OS, how to determine the maximum usage of RAM? the system now use 16 MB of SDRAM and we need to know what is...

Hello all on RTOS like ST20 OS, how to determine the maximum usage of RAM? the system now use 16 MB of SDRAM and we need to know what is the maximum of usage to reduce the size of ram in order to reduce product cost thanx ------ Ahmed Samieh


PPC eval board

Started by Tom St Denis in comp.arch.embedded15 years ago 11 replies

I googled this group and the web and haven't found what I'm looking for. Basically I want a PPC board [like a PPC405, something that runs...

I googled this group and the web and haven't found what I'm looking for. Basically I want a PPC board [like a PPC405, something that runs the basic 32-bit ISA] where I can upload programs [usually


EDK + XMD

Started by Anonymous in comp.arch.embedded13 years ago

Hi, Here is my problem. My memory map is as follows: ISBRAM : 0xFFFFE000:0xFFFFFFFF SDRAM : = 0xF0000000:0xF1FFFFFF I download...

Hi, Here is my problem. My memory map is as follows: ISBRAM : 0xFFFFE000:0xFFFFFFFF SDRAM : = 0xF0000000:0xF1FFFFFF I download bootloop program with the bitstream. The program I want to execute is linked at 0xF0400000. Then I open XMD and write following commands: connect ppc hw -debugdevice cpunr 1 dow sw_projects/dpmain/executable.elf run This works fine the program star...


Memory selection for an embedded system

Started by Anonymous in comp.arch.embedded14 years ago 6 replies

Hi all, I'm currenlty gettting into embedded system architecture and would like to know where can I find any kind of tutorial/articles/lecture...

Hi all, I'm currenlty gettting into embedded system architecture and would like to know where can I find any kind of tutorial/articles/lecture notes regarding the "art" of selecting the memory for my design I.E. what kind of memory to use SDRAM , SRAM ,FLASH ,EEPROM and where to use it. another thing I'm looking for is stuff on the subject of memory mapping I.E. how to arrange the different ...