DIGITAL-LOGIC AG
SMA200 Manual V1.0
30
5.4.6.
LPC BUS
Signal
BUS
Type
Description
On Module
Termination
Ext. Ter-
mination
Needed
Max.
Length
in mm
Ohm
Matched
Length
in mm
LPC_FRAME#
CMOS 3.3V
Out
Connect to the LPC device
-
-
100
55
-
LPC_AD[3..0]
CMOS 3.3V
I/O
Connect to the LPC device
-
-
100
55
-
LPC_SERIRQ
CMOS 3.3V
I/O
Connect to the LPC device PU 10k to
3.3V
-
100
55
-
LPC_CLKOUT[0..1]
CMOS 3.3V
Out
Connect to the Firmware
hub or the SuperIO
Series 33
Ohm
-
100
55
-
If the signals are not used:
Leave the pins open.
Remarks:
Use 33 Ohm series termination in each LPC-CLKx-signal.
The LPC_CLKOUTx may drive only 2 loads.
EMV/EMI filters:
Are not needed.
