Other Parts Discussed in Thread: TMS320C6748
Hi!
I am new to this group .....just now i have joined.....I have worked with Analog device's processors specifically Blackfin
I have a new design with TMS320C6748 where i have to interface DDR2 SDRAM to it.....
I have read the basics of DDR2 SDRAM and i already working experience with SDRAM.....In selecting the DDR2 SDRAM i ahve some confuion....
In DDR2 there are so many types of clock signals are involved..like core clock ,I/O clock..etc
In processor data sheet for EMIFB clock frequency range they given as 125Mhz to 150Mhz...
i am pasting one para which i colected wen i am reading...
"
* DDR2-400: DDR-SDRAM
memory chips specified to run at 100 MHz, I/O clock at 200 MHz
* DDR2-533: DDR-SDRAM memory chips specified to run at 133 MHz, I/O clock
at 266 MHz
* DDR2-667: DDR-SDRAM memory chips specified to run at 166 MHz, I/O clock
at 333 MHz
* DDR2-800: DDR-SDRAM memory chips specified to run at 200 MHz, I/O clock
at 400 MHz
"
Here which clock i need to consider I/O clock which is 200,266,333,400 Mhz or another clock (core)-100,133,166,2000 mhz...
i am little bit poor in english...so, if u didn't understand anything please let me know.....
waiting for reply...
