Intel IQ80219 manual Uart Register Settings, Address Read Register Write Register

Intel® IQ80219 General Purpose PCI Processor Evaluation Platform

Software Reference

5.2.2UART

The UART is a TL16C550C. It sits on the Peripheral Bus and is accessed using PCE1 and XINT1# as shown in Figure 20:

Figure 20. UART Connection to Peripheral Bus

	Texas	CS
Instruments*
TL16C550C
	UART0
Intel® 80219	INTERRUPT	PCE1
General Purpose
PCI Processor
XINT2#
Intel®	80219 General Purpose PCI
	Processor Peripheral Bus
* Other names and brands may be claimed as property of others.
		B2832-01

See 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 Settings
	Address	Read Register	Write Register
	FE81 0000H	Receive Holding Register	Transmit Holding Register
	FE81 0001H	Unused	Interrupt Enable Register
	FE81 0002H	Interrupt Status Register	FIFO Control Register
	FE81 0003H	Unused	Line Control Register
	FE81 0004H	Unused	Modem Control Register
	FE81 0005H	Line Status Register	Unused
	FE81 0006H	Modem Status Register	Unused
	FE81 0007H	Scratchpad Register	Scratchpad Register

5.2.3Rotary Switch

The Rotary switch changes the value of a memory mapped register so it can be read later from software. For example, it can be used to allow the user to select from various boot-up flavors. The Rotary Switch is accessed using Peripheral Chip Enable #4 (PCE4) through PC_AD[0:3].

Board Manual 73