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External Memory

In addition to the Flash and RAM internal to the LPC1857 (or LPC4357) MCU, the MCB1800/4300 board contains the following external memory:

  • 16 MB External SDRAM (IC10) connected to the 32-bit bus.
  • 16 MB External NOR Flash (IC8 and IC9, 8Mbytes each) connected to the 32-bit bus.
  • 4 MB External Quad SPI Flash (IC11) connected to the SPIFI interface.

MCB1800 Board External Memory

Chip Select and Addressing for External Memory

The table below identifies the chip select, pin and address area for the external memory devices on the MCB1800 board.

Device Chip Select / Pin Address Area
NOR Flash CS0 / P1_5 0x1C000000 - 0x1CFFFFFF
SDRAM EMC_DYCS0 / P6_9 0x28000000 - 0x28FFFFFF
Quad SPI Flash SPIFI_CS / P3_8 0x80000000 - 0x803FFFFF (Mirrored at 0x14000000 - 0x143FFFFF. Load applications at 0x14000000 - 0x143FFFFF to debug them.)
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