Technical Reference Guide
5.4.2 SERIAL INTERFACE PROGRAMMING
Programming the serial interfaces consists of configuration, which occurs during POST, and
control, which occurs during runtime.
5.4.2.1 Serial
Interface Configuration
The serial interface must be configured for a specific address range (COM1, COM2, etc.) and also
must be activated before it can be used. Address selection and activation of the serial interface are
affected through the PnP configuration registers of the LPC47B387 I/O controller.
The serial interface configuration registers are listed in the following table:
Table 5-11
. Serial Interface Configuration Registers
Table 5-11.
Serial Interface Configuration Registers
Index
Address
Function
R/W
30h Activate
R/W
60h
Base Address MSB
R/W
61h
Base Address LSB
R/W
70h Interrupt
Select
R/W
F0h Mode
Register
R/W
NOTE:
Refer to LPC47B387 data sheet for detailed register information.
hp compaq d330 and d530 Series of Personal Computers
Featuring the Intel Pentium 4 Processor
First Edition – June 2003
5-11
