Texas Instruments XIO3130 EVM - Manual (Page 2)

1.2 Normal-Mode Operation
Normal-Mode Operation www.ti.com
By default, the EVM should be configured to operate in normal mode. The six jumpers (J7, J11, J13, J14,
J15, and J16) should be covering both pins of each header (see
Figure 1-2 ).
Figure 1-2. Power Jumpers
The dipswitch should be configured with SCL slide switch in the up position and DN1_DPSTRP,
DN2_DPSTRP, and DN3_DPSTRP slide switches in the down position (see
Figure 1-3 ). This
configuration enables the EEPROM and disables hot-plug operation.
Figure 1-3. Dipswitch Configuration
The EEPROM (U3) should also be preconfigured for normal-mode operation. See Section 1.5 for an
explanation of how to configure the EEPROM. Upon deassertion of PERST, the XIO3130 automatically
reads data from the EEPROM. This data is used to preset various PCI configuration register bits. For
normal-mode operation, the data in the EEPROM will configure bits in the following registers:
•
GPIO C control register (PCI register offset: C0h in upstream bridge)
– PCIE_GPIO12_CTL = 010b – Port 1 ACT_LED0
– PCIE_GPIO13_CTL = 011b – Port 2 ACT_LED1
– PCIE_GPIO14_CTL = 100b – Port 3 ACT_LED2
Setting these bits configures LED1 as activity LED for port 1, LED2 as activity LED for port 2, and LED3
as activity LED for port 3. Any time a TLP is transferred to or from the slot, the activity LED flashes. LEDs
4 and 5 are nonfunctional in normal mode; pressing the push buttons will have no effect on the XIO3130.
2 XIO3130 EVM SLLU108 – July 2008
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