Micrel Confidential
15
CENTAUR
KS8695PX Demo Board Description
Integrated Multi-Port PCI Gateway Solution
4.4 External
Interfaces
4.4.1 WAN
Interface
The WAN interface on the KS8695PX is connected to a single transformer with a 50 ohm
differential termination on the transmit side. The line side of the transformer will be
connected to pins 3 (TX+) and 6 (TX-) on the RJ-45 connector. With additional
circuitry, the WAN interface can also support 100 Base FX and interface with fiber optic
modules.
4.4.2 LAN
Interfaces
The LAN interfaces on the KS8695PX are connected to a quad transformer with a 50
ohm differential termination on the transmit side for each port. The line side of the
transformer is connected to pins 3 (TX+) and 6 (TX-) on the RJ-45 connectors for LAN
ports 1-4. With additional circuitry, the LAN1 interface can also support 100 Base FX
and interface with fiber optic modules.
4.4.3 UART
The KS8695PX provides a high speed UART interface. The UART supports up to 120
kbps. The UART interface is a male DB9 connector used for dial-up back up or a
console port.
Connector
Pin No.
KS8695PX Signal Name
KS8695PX
I/O
KS8695PX Signal Description
1
UDCDN
I
UART Data Carrier Detect
2
URXD
I
UART Receive Data
3
UTXD
O
UART Transmit Data
4
UDTRN
O
Data Terminal Ready (active low)
5 N/A N/A
Ground
6
UDSRN
I
UART Data Set Ready
7
URTSN
O
UART Request To Send
8
UCTSN
I
Clear To Send
9 URIN I
Ring
Indicator
