Intel(R) 80219 General Purpose PCI Processor Evaluation Platform ...

Intel® IQ80219 General Purpose PCI Processor Evaluation PlatformSoftware Reference5.2.2 UARTThe UART is a TL16C550C. It sits on the Peripheral Bus and is accessed using PCE1 and XINT1# asshown in Figure 20:Figure 20.UART Connection to Peripheral BusTexasInstruments*TL16C550CUART0CSIntel ® 80219General PurposePCI ProcessorXINT2#INTERRUPTPCE1Intel ® 80219 General Purpose PCIProcessor Peripheral Bus* Other names and brands may be claimed as property of others.B2832-01See datasheet at the following link for more information and a pin layout of this device:http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=TL16C550C.Table 89.UART Register SettingsAddress Read Register Write RegisterFE81 0000H Receive Holding Register Transmit Holding RegisterFE81 0001H Unused Interrupt Enable RegisterFE81 0002H Interrupt Status Register FIFO Control RegisterFE81 0003H Unused Line Control RegisterFE81 0004H Unused Modem Control RegisterFE81 0005H Line Status Register UnusedFE81 0006H Modem Status Register UnusedFE81 0007H Scratchpad Register Scratchpad Register5.2.3 Rotary SwitchThe Rotary switch changes the value of a memory mapped register so it can be read later fromsoftware. For example, it can be used to allow the user to select from various boot-up flavors. TheRotary Switch is accessed using Peripheral Chip Enable #4 (PCE4) through PC_AD[0:3].Board Manual 73