10 serial interfaces, 11 pci & pci express slots, 12 real time clock & nvram – Kontron KTC5520-EATX User Manual
Page 28: Table 2-3 serial interface connector pinout

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2.10 Serial Interfaces
The KTC5520/EATX has one serial port on the Rear Panel I/O for asynchronous serial communications. It is a
16C550 high-speed UART compatible and support 16-byte FIFO buffers for transfer rates from 9,6Kbps to
115,2Kbps.
Table 2-3: Serial Interface Connector Pinout
2.11 PCI & PCI express Slots
One PCI 32bit/33MHz 5V is available on slot 1 and allows the installation of a PCI expansion card. One PCI
express Gen1 x4 with a x8 connector is available on slot 2. Three PCI express Gen2 x8 with x8 connectors are
avaialable on slot 3, 4 & 5. One PCI express Gen2 x8 with a x16 connetor is available on slot 6.
2.12 Real Time Clock & NVRAM
This motherboard has a battery backup.
Pin
Signal
1
DCD
2
RXD#
3
TXD#
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
Signal Path:
The serial port is available through the DB9 connector located on the Rear Panel I/O shield
BIOS Settings:
System Management --> SuperIO Configuration
Note:
If a PCI express x16 expansion card is installed in slot6, it will only work at PCI express x8.