72 SBC347A 3U VPX Single Board Computer
Publication No. 500-9300527837-000 Rev. A.0
6.40 Ethernet Port Availability Register (0x6A0)
NOTE
Even when a port is not available due to a build option, it may still be visible to software.
6.41 COM Port Availability Register (0x6A1)
Availability of COM2 is build option dependent.
6.42 COM Port 4-Wire Configuration Register (0x6A2)
Configuration of COM2 is build option dependent.
Bits
Description
Default
7 to 2
Ethernet ports 7 to 2.
000000
b
1
Ethernet port 1 availability:
0 = Ethernet port 1 is not available
1 = Ethernet port 1 is available
N/A
0
Ethernet port 0 availability:
0 = Ethernet port 0 is not available
1 = Ethernet port 0 is available
N/A
Bits
Description
Default
7 to 2
COM ports 8 to 3 availability:
COM ports 8 to 3 are not available.
0 = COM port is not available
000000
b
1
COM2 availability:
0 = COM2 is not available
1 = COM2 is available
N/A
0
COM1 availability:
COM1 is always available.
1 = COM1 is available
1
Bits
Description
Default
7 to 2
Reserved
000000
b
1
COM2 4-wire configuration:
0 = COM2 is available in 2-wire (TX/RX) mode only
1 = COM2 is available in 4-wire (RS232 or RS422) mode
N/A
0
COM1 4-wire configuration:
COM1 is only ever available in 2-wire mode.
0 =COM1 is available in 2-wire (TX/RX) mode only
0