ARM ARM DUI 0224I - page 354

Memory Expansion Boards
E-4 Copyright © 2003-2010 ARM Limited. All rights reserved. ARM DUI 0224I
Memory width selection on the static memory board
The memory width on the memory board is encoded into the CSWIDTH[1:0] signals
as shown in TableE-1.
Note
Additional configuration information is present in the E2PROM on the expansion
board, see EEPROM contents on page E-6.
TableE-1 Memory width encoding
CSWIDTH[1:0] Width
00 8 bit
01 16 bit
10 32 bit (default)
11 No memory present