Switch Configuration: SW1
Table 1: PCIe Link Width Configurations
Note 1:
This switch sets the PRNST# bus pins so the card can be appropriately identified by the root
complex.
Note 2:
Other switch configurations not valid.
Note 3:
Factory settings for all SW1 are: SW1-1 OFF, SW1-2 ON, SW1-3 OFF, SW1-4 OFF.
SW1-1
SW1-2
SW1-3
SW1-4
PCIe Bus Link Width
ON
OFF
OFF
OFF
x1
OFF
ON
OFF
OFF
x4 (default setting)
OFF
OFF
ON
OFF
x8
OFF
OFF
OFF
ON
x16
4
5
Connector Signals
Connector signals are provided primarily as test points but they can be driven for debug purposes as long as the supplied
signals meet the PCIe electrical specification.
Table 2: J16 Connections
Note:
VCC required only if I
2
C signals are not pulled
up on the I
2
C analysis equipment.
PIN
DESCRIPTION
1
DGND
2
I2C_SDA_EXT
3
I2C_SCL_EXT
4
VCC (+3.3V to +5.0V)
Table 3: J42 Connections
PIN
DESCRIPTION
1
PERST# OUT
2
WAKE# OUT
3
CLKREQ# OUT
4
DGND
Table 4: J8 Connections
PIN
DESCRIPTION
1
RSVDA19
2
RSVDA32
3
RSVDA33
4
RSVDA50
5
RSVDB30
6
RSVDB82
