81348 Datasheet, PDF (9/89 Pages) Intel Corporation – Two Integrated Intel XScale processors

Features—Intel^® 81348
2.0 Features
2.1 About the Intel^® 81348 I/O Processor
The 81348 is a single- or dual-function PCI device that integrates two Intel XScale^®
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bus and South XSI bus. With the two internal busses, transactions can take place
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on-chip SRAM Memory Controller, or the SAS Engines control registers. Peripherals that
generate large burst transactions are located on the south XSI bus, thus allowing the
two Intel XScale^® processors exclusive access to the north XSI bus.
The 81348 consolidates the following features into a single system:
• Two Intel XScale^® processors running at speeds up to 1.2 GHz
• _{(ESigAhTtAS)eorpiaelraPtriootnocol} Links capable of Serial-Attached SCSI (SAS) or Serial ATA
• PCI–Local Memory Bus Address Translation Unit, function 0 programming interface
• Messaging Unit, function 0 programming interface
• _{1A6p-psliocuartcioenXDOiRreoctpeMreamtioonr)y} Access (DMA) Controller (including offload for up to a
• Transport DMA Controllers
• Peripheral Bus Interface Unit
• Integrated DDR2 Memory Controller
• Integrated SRAM Memory Controller
• Two programmable timers per Intel XScale^® processor
• Watchdog timer per Intel XScale^® processor
• Three I²C Bus Interface Units
• Two Serial Port Units
• Sixteen General-Purpose Input/Output (GPIO) ports
• ACTIVITY/STATUS pin pairs—one per SAS Engine
• Internal North Bus–South Bus Bridge
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The 81348 can support PCI-X 1.0b and/or PCI Express* as a reset option. The PCI bus
is an industry standard, high-performance, low-latency system bus. The 81348 PCI bus
is capable of 133 MHz operation in PCI-X 1.0b mode (as defined by the PCI-X
Addendum to the Local Bus Specification, Revision 1.0b). Also, the processor supports
a 66 MHz conventional PCI mode (as defined by the PCI Local Bus Specification,
Revision 2.3). The addition of the Intel XScale^® processors brings intelligence to the
PCI bus application bridge. 81348 supports an x8 PCI Express* interface.
December 2007
Order Number: 315038-003US
Intel^® 81348 I/ODParotacsehsesoert
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