User`s guide

Intel
®
StrongARM
®
SA-1110 Microprocessor Development Board User’s Guide 4-1
Hardware Considerations 4
This chapter provides an in-depth description on the following topics:
• Xbus expansion headers
• Storage
• GPIOs
• Registers
• Displays
• Buses and Ports
• Power
• Audio
4.1 Xbus Expansion Headers
The general-purpose expansion bus headers provided on the SA-1110 Development Board are
referred to as the Xbus headers (not to be confused with ISA Xbus). All SA-1110 address, data and
memory interface signals are buffered before driving the Xbus headers.
The Xbus headers allow interfacing to the SA-1111 microprocessor companion chip and the SA-
1111 Development Module as well as a third-party graphics chip daughter board.
These general-purpose expansion headers allow the use of the SA-1110 Development Board as a
general-purpose hardware and software development platform for battery-powered and tethered
applications. For more information about Xbus headers, see the Intel
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StrongARM
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SA-1111
Development Module User’s Guide.
4.2 Storage
This section describes the memory map, the SDRAM interface, the expansion flash memory, the
interface for the expansion SDRAM, and compact flash issues.
4.2.1 Intel
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StrongARM
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SA-1110 Development Board Memory
Map
Table 5-1 shows the address ranges for the standard SA-1110 Development Board Xbus devices as
well as flash memory, SDRAM, and system control and system debug registers. The address range
field indicates the entire decoded range while the size:width field indicates the actual resource size
and width within the decoded range. All decoded resources are address wrapped within their
address range.