16
Board Layout
Chapter 3
Embedded and Industrial Computing
JP1, JP2: Select COM1 and COM2 Pin No9 (Ring Indicator)
function respectively
JP1 JP2
Pin Signal Pin Signal
1-2 VCC5 1-2 VCC5
3-4 VCC12 3-4 VCC12
5-6 SPI_RI 5-6 SPI_RI
MIO1 on the expansion card: Connector for connecting
the COM port and audio expansion board to the LEC-2280
main board.
PIN Pin Name PIN Pin Name
1 GND 51 HDA_BCLK
2 N/A 52 HDA_SYNC
3 N/A 53 HDA_RST
4 GND 54 HDA_SDIN0
5 N/A 55 HDA_SDO
6 N/A 56 SPK
7 GND 57 GND
8 VCC5 58 VCC3
9 VCC5 59 VCC3
10 N/A 60 N/A
11 GND 61 GND
12 N/A 62 N/A
13 N/A 63 N/A
14 N/A 64 N/A
15 N/A 65 N/A
16 N/A 66 N/A
17 N/A 67 N/A
18 GND 68 GND
19 N/A 69 N/A
20 N/A 70 N/A
21 GND 71 N/A
22 +12V 72 N/A
23 N/A 73 N/A
24 VCC5 74 N/A
25 VCC5 75 GND
26 VCC5 76 N/A
27 VCC5 77 N/A
28 GND 78 GND
29 N/A 79 N/A
30 N/A 80 N/A
31 N/A 81 N/A
32 N/A 82 N/A
33 GND 83 GND
34 N/A 84 COM1_DCD#
35 N/A 85 COM1_RI#
36 N/A 86 COM1_CTS#
37 N/A 87 COM1_DTR#
38 N/A 88 COM1_RTS#
39 N/A 89 COM1_DSR#
40 N/A 90 COM1_SOUT
41 N/A 91 COM1_SIN
42 GND 92 GND
43 N/A 93 COM2_DCD#
44 N/A 94 COM2_RI#
45 N/A 95 COM2_CTS#
46 N/A 96 COM2_DTR#
47 N/A 97 COM2_RTS#
48 N/A 98 COM2_DSR#
49 N/A 99 COM2_SOUT
50 N/A 100 COM2_SIN
Note: Daughter boards such as COM ports and
low-profile PCIe extension boards can only be
inserted to the mainboards with the same version.
Failure to do so may damage the system. The
board version is shown on top of the boards.
Clear CMOS jumper (CMOS1/CMOS2): It is for clearing
the CMOS data. CMOS 1clears CMOS data with real-time
clock (RTC) whereas CMOS2 clears CMOS data only.
To erase the CMOS data:
Turn off the computer and unplug the power cord.
Move the jumper cap from pins 1-2(default) to pins 1.
2-3. Keep the cap on pins 2-3 for about 5-10 seconds,
then move the cap back to pins 1-2.
Plug the power cord and turn on the computer.2.
Enter BIOS setup to re-enter data.3.
Serial-ATA Connector (SATA1/SATA2): It is for connecting
a 2.5’’ hard disk to be served as your system’s storage. It
can support SATA 3.0 which features Data transfer rates
up to 6.0 Gb/s (600 MB/s). SATA 2 connector also supports
SATA-DOM (the power line of SATA-DOM can be disabled
with a jumper on, see SATA_PW2).
Pin No. Pin Name
1-2 Normal (Default)
2-3 Clear CMOS and RTC (CMOS1)
Clear CMOS only (CMOS2)
1
2
3
1
3
5
2
4
6
Pin No. Function
1 GND
2 TX0_P
3 TX0_N
4 GND
5 RX0_N
6 RX0_P
7 GND
1 2 3 4 5 6 7
7 6 5 4 3 2 1
SATA1
SATA2
Pin No. Function
1 GND
2 TX1_P
3 TX1_N
4 GND
5 RX1_N
6 RX1_P
7 VCC5
LEB-2280 Board
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