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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.