16
Board Layout
Chapter 3
Embedded and Industrial Computing
SW5: Select COM2 Termination in RS-485 (SW5) This
switch is used to enable or disable the signal termination
for COM2. We strongly recommend that you disable
termination when the port is configured as RS-232 and
enable it when the port is configured as RS-485/RS-422.
RS-232/422/485 Serial Port(COM3~COM6, J9 on
the backside): It is a RS-232 port through the D-SUB9
connector. Note that only COM3 can select among
RS232/422/485.
SW1, SW6, and SW7: Select COM3 Protocol Setting
RS-232
RS-422
RS-485
SW8: Select COM3 Termination in RS-485 (SW8): This
switch is used to enable or disable the signal termination
for COM3. We strongly recommend that you disable
termination when the port is configured as RS-232 and
enable it when the port is configured as RS-485/RS-422.
LAN1/LAN2 Ports (CN13/CN14): The LAN ports are
provided by Intel 82574L Ethernet controller whose
interface complies with PCI-e 1.1 (2.5 Ghz). It has advanced
management features including IPMI pass-through via
SMBus or NC-SI, WOL, PXE remote boot, ISCSI boot and
VLAN filtering.
Pin No. Description
Fast Ethernet Gigabit Ethernet
1 TX+ BI_DA+
2 TX- BI_DA-
3 RX+ BI_DB+
4 -- BI_DC+
5 -- BI_DC-
6 RX- BI_DB-
7 -- BI_DD+
8 -- BI_DD-
Clear CMOS jumper (JP1): It is for clearing the CMOS
memory.
Digital I/O (CN6)
Digital IN/OUT(DIO1) Connector: The 8 pins of General
Purpose Input/Output (GPIO) support input and output
operations through the DB-9 female connector.
TTL Level is +5V; Maximum input/output current for
each port is 64mA
Input/Output Voltage Logic Register
0~2V Low 0
2~5V High 1
The default value is 0
DIO Address
Address Description Address Description
0x2e SUPERIO_INDEX 0x08 GPIO3
0x2f SUPERIO_DATA 0x10 GPIO4
0x07 BANK_REG 0x20 GPIO5
0x01 GPIO0 0x40 GPIO6
0x02 GPIO1 0x80 GPIO7
0x04 GPIO2
Pin No. Pin Name
1-2
Normal (Default)
2-3 Clear CMOS
1
2
3
COM5 COM6
11 12 13 14 15 16 17 18 19 20
COM3 COM4
Pin No. Pin Name
RS-232 RS-422 RS-485
1 RTS3# TX+ DATA+
2 SIN3 TX- DATA-
3 SOUT3 RX+ NC
4
CTS3# RX- NC
5
GND GND GND
6 RTS4#
7 SIN4
8 SOUT4
9 CTS4#
10 GND
Pin No. Pin Name
RS-232
11 RTS5#
12 SIN5
13 SOUT5
14 CTS5#
15 GND
16 RTS6#
17 SIN6
18 SOUT6
19 CTS6#
20 GND
Pin No. Function
SW8 on Enable termination
SW8 off Disable termination
Off On
SW8
SW1
1
2
3
4
Off On
SW6
1
2
3
4
Off On
SW7
4
3
2
1
On Off
SW5
OFF
ON
Pin No. Function
SW5 on Enable termination
SW5 off Disable termination
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