Nico Aprile

LPC1788 and SDRAM 512Mbit structured as 4 Meg x 32 bits x 4 banks

Discussion created by Nico Aprile on Feb 19, 2019
Latest reply on Feb 22, 2019 by Nico Aprile

I'm using an external SDRAM connected to the LPC1788FDB208 microcontroller. As SDRAM I chose (and unfortunately already bought many pieces) the IS42S32160F-7TLI model ( http://www.issi.com/WW/pdf/42-45R-S-32160F.pdf  ). This model is a 512Mbit SDRAM structured as 4Mx32x4 (4 Meg x 32 bits x 4 banks). Reading the LPC17xx user manual I seem to understand that the LPC17_xx family doesn't support the 512Mbit SDRAM structured as 4M x 32 x 4 banks, is this correct? Did I well understand? If yes (the LPC17_xx family doesn't support the 4M x 32 x 4 banks configuration) is it possible to use my 512 Mbit SDRAM as a 256 Mbit? If yes, how do I have to configure the DINAMICCONFIG0 register? 

 

Many thanks 

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