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Memory Expansion Boards
E-2 Copyright © 2003-2007 ARM Limited. All rights reserved. ARM DUI 0224F
E.1 About memory expansion
You can fit static and dynamic memory expansion boards to the PB926EJ-S:
• There are five chip select signals available on the static expansion board. Each of
these can select 64MB of SRAM.
• There are 3 chip select signals available on the dynamic expansion board. Each of
these can select 128MB of SDRAM.
The block diagrams for typical memory boards are shown in Figure E-1 and Figure E-2
on page E-3.
Note
Figure E-1 and Figure E-2 on page E-3 are examples only. Different expansion boards
might have different features. For example, the links selecting which chip select to use
might be omitted.
See the documentation provided with your memory board for details on signals and link
options.
Figure E-1 Dynamic memory board block diagram
Expansion connector J13
Dynamic
memory
A[14:0] and control signals
DQ[31:0]
SBSCL
SBSDA
E2PROM
nDYCS[3:1]
Chip select
links