Exar Corporation • 48720 Kato Road • Fremont, CA 94538 • U.S.A. • +1.510.668.7000 • fax +1.510.668.7001 • www.exar.com FLY1109_XR17V352-V354-V358 ©2009 Exar Corporation
Features
• Single3.3Vpowersupply
• Internalbuckregulatorfor1.2Vcore
• PCIe2.0Gen1compliant
• x1PCIeLink,dualsimplex,2.5Gbpsin
eachdirection
• EEPROMinterfaceforconfiguration
• Dataread/writeburstoperation
• Globalinterruptstatusregisterforup
toeightUARTs
• Upto25Mbpsserialdatarate
• 16multi-purposeinputs/outputs
(MPIOs)
• 16-bitgeneralpurposetimer/counter
• Sleepmodewithwake-upIndicator
• ExpansionportinterfaceonV354/
V358allowscascadingupto16
UARTchannels
• UptoeightindependentUART
channelscontrolledwith:
• 16550compatibleregisterSet
• 256-byteTX&RXFIFOs
• ProgrammableTX&RXTrigger
Levels
• TX/RXFIFOLevelCounters
• Fractionalbaudrategenerator
• AutomaticRTS/CTSorDTR/
DSRhardwareflowcontrolwith
programmablehysteresis
• AutomaticXon/XoffS/Wflow
control
• RS-485halfduplexdirection
controloutputwith
programmableturn-around
delay
• Multi-dropwithAutoAddress
Detection
• Infrareddataencoder/decoder
• SoftwarecompatibletoXR17C15x,
XR17D15x,XR17V25xPCIUARTs
T
heXR17V352¹(V352),XR17V354¹(V354)andXR17V358¹
(V358)arepartofthesinglechip2/4/8-channelPCI
Express(PCIe)UART(UniversalAsynchronousReceiver
andTransmitter)productfamily.ThePCIeUARTFamilyis
optimizedforhigherperformanceandlowerpower.All
threePCIeUARTsserveasasinglelanePCIebridgeto2,4or
8independentenhanced16550compatibleUARTsandare
complianttoPCIe2.0Gen1(2.5GT/s).
InadditiontotheUARTchannels,thePCIeUARTshave
16multi-purposeI/Os(MPIOs),a16-bitgeneralpurpose
counter/timerandaglobalinterruptstatusregisterto
optimizeinterruptservicing.
EachUARThasamultitudeofenhancedfeaturessuchas
the256-byteTXandRXFIFOs,programmableFractional
BaudRateGenerator,AutomaticHardwareorSoftware
FlowControl,AutoRS-485Half-DuplexDirectionControl,
programmableTXandRXFIFOTriggerLevels,TXandRX
FIFOLevelCounters,infraredmode,anddataratesupto
25Mbps.TheV352isavailableina113-pinfpBGApackage
(9x9mm).TheV354andV358areavailableina176-pin
fpBGApackage(13x13mm)andarepincompatibleto
eachother.TheV354andV358canalsobecascadedto
haveupto16UARTchannelsusingasinglePCIex1lane.
Note¹: Covered by U.S. Patents #5,649,122, #6,754,839, #6,865,626 and #6,947,999
Direct Connectivity with Complete
Single Chip Endpoint Solution
HighPerformance
Dual/Quad/Octal
PCIExpressUARTs
XR17V352/V354/V358