Serial interface – ADLINK CoreModule 435 User Manual
Page 29
Chapter 3
Hardware
CoreModule 435
Reference Manual
23
Serial Interface
The Vortex CPU contains the circuitry for all four serial ports. The CoreModule 435 provides serial ports 1
and 2 through transceivers U7 and U9 (headers J3 and J9), serial port 3 through transceiver U4 (header J14)
and serial port 4 through transceiver U5 (header J13). The serial ports support the following features:
•
Programmable word length, stop bits and parity
•
16-bit programmable baud rate generator
•
Interrupt generator
•
Loop-back mode
•
16-bit FIFOs for each port
•
Ports 1, 2, 3, and 4 are supported by the Vortex processor and are 16C550/16C552 compatible
♦
Serial 1 (J3, COM1) supports RS-232/RS-485 with full modem operation
♦
Serial 2 (J9, COM2) supports RS-232/RS-485 with full modem operation
♦
Serial 3 (J14, COM3) supports RS-232 with full modem operation
♦
Serial 4 (J13, COM4) supports RS-232 with full modem operation
To implement the two-wire RS-485 mode on either serial port, you must tie together the equivalent pins for
the selected port.
0070-0071
RTC/ NMI enable
0080-008F
DMA Page
00A0-00A1
Slave Interrupt Controller (#2)
00C0-00DF
Secondary DMA Controller (#2)
00F0-00FF
Math Coprocessor (only in the DX processor)
01F0-01F7
IDE 0 (can be disabled)
02E8-2FF
Serial Port 4 (COM4) (base configuration @
3F8h/2F8h/3E8h/2E8h/10)
02F8-02FF
Serial Port 2 (COM2) (base configuration @
3F8h/2F8h/3E8h/2E8h/10)
03E8-3EF
Serial Port 3 (COM3) (base configuration @
3F8h/2F8h/3E8h/2E8h/10)
03F6
IDE 0 (see 1F0)
03F8-03FF
Serial Port 1 (COM1) (base configuration @
3F8h/2F8h/3E8h/2E8h/10)
0CF8
PCI Configuration Address
0CFC-0CFF
PCI Configuration Data
NOTE
The RS-232/RS-485 modes for Serial Port 1 (COM1) and Serial Port 2 (COM2)
are selected in BIOS Setup Utility. However, the RS-232 mode is the default
(Standard) for any serial port.
RS-485 mode termination is selected with jumper JP2 Serial 1 (COM1) and JP1
Serial 2 (COM2) on the module. Refer to
for more information.
Table 3-4. I/O Address Map (Continued)