One Stop Systems, Inc. OSS-lanPMC-4GC User Manual
Rev. A
5
Block Diagram
Busmode Pins
Since OSS-lanPMC-4GC supports only the PCI bus protocol at the PMC connectors, the BUSMODE1# pin is asserted LOW for two
reasons only; (1) to indicate its presence to the host, and (2) to indicate that it is capable of performing PCI Bus protocol. The
OSS-lanPMC-4GC responds within ten PCI clock cycles after detecting the state of BUSMODE[4:2]# pins.
BUSMODE[4:2]# state (input)
Mode
BUSMODE1# output state
Response explanation
000
“Card Present” test.
0
“Card Present” mode.
No bus protocol is used and
card is held in reset
001
Return Card Present
0
Capable of performing
if PCI capable and
PCI protocol.
uses PCI protocol.
All other states
-
1
Card held in reset.
