lpcware

Does LPC4300 works with 32MB SDRAM?

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jul 12, 2016 by Sigurd Möller
Content originally posted in LPCWare by irvin on Wed May 16 01:24:49 MST 2012
Can anybody confirm that LPC43xx works with following 32MB SDRAM parts: ISSI IS45S32800D or Micron MT48LC8M32LF?

On our board we use 256Mb SDRAM which have: 8M x 32b (Row length:12, Column length: 9, Bank: 4) configuration.

According to the user manual (DYNAMICCONFIG register), this SDRAM configuration is not supported. I spoked with NXP, and they told me to use following register settings (shown in user manual, table 364 - see attachment):
32 external bus high-performance address mapping
- 128 Mb (8Mx16), 4 banks, row length = 12, column length = 9

Unfortunately it does not work for us. Currently we use settings
- 128 Mb (4Mx32), 4 banks, row length = 12, column length = 8,
but only 16MB work.

Does anyone use same SDRAM, and can provide me DYNAMICCONFIG register settings?

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