Texas Instruments XIO3130 EVM - Manual (Page 13)

www.ti.com Using the TopHAT Utility
TopHAT parses the PCI configuration space looking for any capability structure. If it finds a capability
structure, a new icon and description of the capability will show under the device. For example, under the
XIO3130 PCI/PCI bridge (TI) entry, a capability for Power Management Capability Structure is shown with
a PM icon. Double clicking any of the capabilities opens a new dialog box. Some dialog boxes have tabs
that display more information about the capability.
Figure 1-16 shows the contents of the “Slot Info” tab for
the PCI Express Capability Structure.
Figure 1-16. Slot Info
In this example, the XIO3130 EVM is operating in hot-plug mode, as can be seen by looking at the Slot
Capabilities table entries. TopHAT can be used to exercise the XIO3130, for example selecting blink from
the Attention Indicator Control drop-down box causes the attention indicator LED on the EVM to blink.
Note that this dialog box also shows where the capability exists in the PCI configuration space. In this
example, it is at offset 0x090. Clicking the “Open Register Access Window” opens the PCI Registers
dialog box (see
Figure 1-17 ). Note that the register where the capability begins is automatically selected,
in this case at PCI offset 0x090.
SLLU108 – July 2008 XIO3130 EVM 13
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