Interfaces and Connectors
25
Lion (VL-EPMe-42) Reference Manual
Serial Ports
The Lion features four on-board 16550-based serial communications channels Two are standard
PC I/O address (COM1,COM2) and two are via HSUARTs in the Kaby Lake processor (COM3,
COM4). COM1, COM2 are multiprotocol RS-232/422/485 ports. COM3, COM4 are RS-232.
COM Port Configuration (COM
1
, COM
2
)
Use the BIOS Setup utility to select between RS-232 and RS-422/485 operating modes.
Jumper block V1 configures the serial ports for RS-422/485 operation. See
details. The 120
Ω termination resistor should be enabled RS-485 endpoint stations; termination is
optional for RS-422. It should be disabled for all RS-232 modes and RS-485 intermediate stations.
If RS-485 mode is used, the differential twisted pair (TxD+/RxD+ and TxD-/RxD-) is formed by
connecting plus-to-plus and minus-to-minus.
RS-485 Mode Line Driver Control
The transmit line driver can be automatically turned on and off based on data availability in the
UART output FIFO. This mode can be enabled in the BIOS Setup utility. The transmit line driver
can be enabled in the BIOS Setup utility.
Serial Port Pinouts
Table 12. COM1-2 Pinout –Connector J14
Pin
Signal
Description
1
RTS1/TXD1_P
Usual signals for COM1
2
TXD1#/TXD1_N
3
CTS1/RXD1_P
4
RXD1#/RXD1_N
5
GND
Signal Ground
6
RTS2/TXD2_P
Usual signals for COM2
7
TXD2#/TXD2_N
8
CTS2/RXD2_P
9
RXD2#/RXD2_N
10
GND
Signal Ground
Содержание Lion
Страница 9: ...Introduction Lion VL EPMe 42 Reference Manual 2 Figure 1 Major Components and Connectors Top Side ...
Страница 17: ...Physical Layout Lion VL EPMe 42 Reference Manual 10 Figure 6 Connector Locations Bottom ...
Страница 19: ...Physical Layout Lion VL EPMe 42 Reference Manual 12 Figure 7 VL CBR 4005 Connectors ...
Страница 40: ...Interfaces and Connectors 33 Lion VL EPMe 42 Reference Manual Figure 17 Location of Ethernet Status LEDs ...