Intel i960 Series User Manual

A HARDWARE REFERENCE
3-9
3.7 CONSOLE SERIAL PORT
The Cyclone EP has a single console port with an RS-232 line interface. The port uses a phone plug
connector, and the board is supplied with a phone jack to DB25 cable.
The serial port is implemented with a 16C550 UART clocked with a 1.843 MHz clock. The device may
be programmed to use this clock with the internal baud rate counters. The serial port may be run at baud
rates between 1200 and 115200 baud. Refer to the 16C550 device data book for a detailed description of
the registers and device operation.
Table 3-9. 80960Sx and Kx Interrupt Switch Settings
Interrupt Source Pos1 Pos2 Pos3 Pos4 Switch Diagram
Serial Port UART
PLX PCI 9060
ON* OFF* OFF* ON*
Squall II Module
IRQ1
PLX PCI 9060
OFF ON OFF* ON*
Serial Port UART
Parallel Port
ON* OFF* ON OFF
Squall II Module
IRQ1
Parallel Port
OFF ON ON OFF
NOTE:
* Bold indicates factory default position
Table 3-10. UART Register Addresses
Address Read Register Write Register
B000 0000H Receive Holding Register Transmit Holding Register
B000 0004H Unused Interrupt Enable Register
B000 0008H Interrupt Status Register FIFO Control Register
B000 000CH Unused Line Control Register
B000 0010H Unused Modem Control Register
B000 0014H Line Status Register Unused
B000 0018H Modem Status Register Unused
B000 001CH Scratchpad Register Scratchpad Register
LSB of Divisor Latch
MSB of Divisor Latch
O F F
1 2 43
DHS-4

Intel i960 Series Specifications

General

Brand	Intel
Model	i960 Series
Category	Computer Hardware
Language	English