LPC4357 SDRAM connection

[anagoncalves]

Hi,

Must I use CLK1 to connect a 16x SDRAM to KPC4357 to reach 104MHz? If I use CLK0 instead of CLK1 there is a chance to reach the maximum speed?

Thanks,

[Carlos_Mendoza]

Hi Ana,

When using only one external chip, use the CLK1 or CLK3 pin to drive the SDRAM clock for best performance. CLK0 and CLK2 pins are used for SDRAM read capture feedback clocks and must not be used for any other function.

There is an errata at below link. Please check it if you are planning to use high SDRAM frequencies:

http://www.nxp.com/documents/errata_sheet/ES_LPC435X_3X_2X_1X_FLASH.pdf 

Hope it helps!

Best Regards,
Carlos Mendoza
Technical Support Engineer