Uart; Rotary Switch; Uart Connection To Peripheral Bus - Intel IQ80219 Board Manual

5.2.2

UART

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

UART Connection to Peripheral Bus

Intel
General Purpose
PCI Processor
* Other names and brands may be claimed as property of others.
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
FE81 0000H
FE81 0001H
FE81 0002H
FE81 0003H
FE81 0004H
FE81 0005H
FE81 0006H
FE81 0007H
5.2.3

Rotary 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
Intel® IQ80219 General Purpose PCI Processor Evaluation Platform
Figure 20:
®
80219
Receive Holding Register
Unused
Interrupt Status Register
Unused
Unused
Line Status Register
Modem Status Register
Scratchpad Register
Instruments*
TL16C550C
XINT2#
Intel
Read Register
Software Reference
Texas
CS
UART0
®
80219 General Purpose PCI
Processor Peripheral Bus
Write Register
Transmit Holding Register
Interrupt Enable Register
FIFO Control Register
Line Control Register
Modem Control Register
Unused
Unused
Scratchpad Register
B2832-01
73