EmbeddedRelated.com

alternative to DM9161E ( Ethernet physical layer transceiver)??

Started by Mayank Kaushik in comp.arch.embedded19 years ago 3 replies

hi all, Im using an AT91RM9200 chip nowadays and im starting to look at building an ethernet interface . the chip needs to be used with...

hi all, Im using an AT91RM9200 chip nowadays and im starting to look at building an ethernet interface . the chip needs to be used with a physical layer transceiver . The AT91DK uses DM9161E , i cant seem to get hold of that chip . is there any cheap , easily avaliable and easy to use alternative .....by the way im in Delhi , India. THanks Mayank


HOT SWAP COMPACT FLASH

Started by jtyler in comp.arch.embedded19 years ago 2 replies

I am confused, the AT91RM9200 comes with a compact flash interface. I would like to be able to hot swap the cf while the system is running. How...

I am confused, the AT91RM9200 comes with a compact flash interface. I would like to be able to hot swap the cf while the system is running. How do I make the interface hot-swappable. Do I need PCMCIA interface. Or is there another way to hot swap. I really thank you for any reply john This message was sent using the comp.arch.embedded web interface o www.EmbeddedRelated.com


Help needed in ATMEL ARM9 microcontroller

Started by bbaskaran in comp.arch.embedded18 years ago 2 replies

Dear All, I am using ARM9 based ATMEL AT91RM9200 microcontoller for a communication project. I am using a custom designed PCB. Problem is...

Dear All, I am using ARM9 based ATMEL AT91RM9200 microcontoller for a communication project. I am using a custom designed PCB. Problem is when i am receiving data via serial port, some times the controller got hang up. Need to restart every time. I am using RS485 communication and receive data via ttyS3 port. Presently i am receiving data in non-cannonical mode. controller have ...


Multiplexed signals on PIO controllers-AT91RM9200

Started by MaheshS in comp.arch.embedded18 years ago 1 reply

Hello! Can we use the multplexed signals on PIO controllers simultaneously to different peripherals? For example, the I/O line PB19(PIO...

Hello! Can we use the multplexed signals on PIO controllers simultaneously to different peripherals? For example, the I/O line PB19(PIO controller B)is multplexed with DTR1(on peripheral A )and ERXCK (on peripheral B). I want to use DTR1 for an RS-232 transciver and ERXCK for Ethernet Transciever, simultaneously.How can I achieve this? Please suggest. Best regards, S Mahesh.


BGA soldering and ground plane

Started by sjon...@scannex.co.uk in comp.arch.embedded16 years ago 19 replies

I have designed a 6 layer board using a 256 ball Atmel BGA chip (AT91RM9200). It consists of two internal power layers, 2 internal signal layers...

I have designed a 6 layer board using a 256 ball Atmel BGA chip (AT91RM9200). It consists of two internal power layers, 2 internal signal layers and two heavily copper filled outer layers with virtually no tracks. The stackup has the Toplayer, Signal layer then Power layers very close together with a 1mm core. I am seeing a high level of failures due to the BGA chip solder balls not melting ...


BGA reflow soldering profile

Started by sjon...@scannex.co.uk in comp.arch.embedded16 years ago 1 reply

I am having problems soldering a Rohs compliant BGA ATMEL AT91RM9200 (rohs compliant board) This device recommends a soldering profile...

I am having problems soldering a Rohs compliant BGA ATMEL AT91RM9200 (rohs compliant board) This device recommends a soldering profile from J-STD-20 and a minimum peak package temperature of 250 centigrade, peak 260. However a lot of the other components on the board have lower peak reflow temps, such as sanyo poscaps (240), watch crystals and littlefuse fuses (245). These components are very...


SPI DataFlash vs parallel Flash for running Linux on an ARM board

Started by Mayank Kaushik in comp.arch.embedded19 years ago 1 reply

Hi, Ive been developing a board based on the AT91rm9200 (arm920t). I have added 16 MB ram to this board, and am looking to add some...

Hi, Ive been developing a board based on the AT91rm9200 (arm920t). I have added 16 MB ram to this board, and am looking to add some flash. I want Linux installed on this board. (this is basically an educational project) My question is, do i HAVE to add a parallel flash? will such a system be capable of running Linux if i just add an 8MB SPI dataflash? As far as i know, a parallel flas...