Intel IQ80321 manual Uart Register Settings, Address Read Register Write Register

Intel® IQ80321 I/O 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

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