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23
LAN35MH08HR & LAN35ME08HR User’s Manual
CN26 Pin
Function
Description
1
Port 1 Status LED cathode
Low when linked, tri-state with activity or no link
3
Port 2 Status LED cathode
Low when linked, tri-state with activity or no link
5
Port 3 Status LED cathode
Low when linked, tri-state with activity or no link
7
Port 4 Status LED cathode
Low when linked, tri-state with activity or no link
9
StackNET Upward Status LED cathode
Low when linked, tri-state with activity or no link
11
Port 5 Status LED cathode
Low when linked, tri-state with activity or no link
13
Port 6 Status LED cathode
Low when linked, tri-state with activity or no link
15
Port 7 Status LED cathode
Low when linked, tri-state with activity or no link
17
Port 8 Status LED cathode
Low when linked, tri-state with activity or no link
19
Host Ethernet Status LED (LAN35MH)
StackNET Down Status LED (LAN35ME)
Low when linked, tri-state with activity or no link
21
Switch Status LED cathode
Low when illuminated, tri-state when off
23
IEEE1588 Time Tick
Programmable as input or output,
1Hz-25MHz
(LVCMOS 2.5V, see specifications)
25
Switch Reset Button Input
Short to ground to reset the VSC7428
2, 4, 6, 8, 10,
12, 14, 16, 18,
20, 22
+5 Volts (LED anode)
Power for LEDs
24, 26
GND
Ground Connection
Table 12: CN26 Signal Descriptions
3.3.7
CN1
(T
OP
)
&
CN2
(B
OTTOM
)
PCI
E
/104
B
US
C
ONNECTORS
The PCIe connector is the connection to the CPU board. The position and pin assignments are compliant with the
PCI/104-Express
Specification
(see PC/104 Specifications on page 62). The LAN35Mx08
boards are “Universal” and may be connected to either a Type 1 or
Type 2 PCIe/104 bus.
In the case of the LAN35MH08HR
“host” version, a
single PCI Express x1 link is used by the onboard Intel I210 Ethernet controller. All other
signals are passed through per the
PCI/104-Express Specification
. The board may be stacked above or below the CPU board if the CPU has
PCIe links available.
The LAN35ME08HR
“expansion” version uses the PCIe/104 bus for power only.
All bus signals (PCIe, USB, etc) are passed through per the
PCI/104-Express Specification
. The board may be stacked above or below the CPU board if power is available (and there is no mechanical
interference with the downward StackNET connector).
Table 13: Bus Connectors
Connector
Function
Location
Size and Pitch
Mating Connector
CN1
PCIe/104 Universal Bus
Top
156-pin, 0.635mm
Samtec ASP-186622-01
CN2
PCIe/104 Universal Bus
Bottom
156-pin, 0.635mm
Samtec ASP-129637-03
