NEX-CARDBUS

The NEX-CARDBUS Bus Adapter provides clocking, setup, disassembly, and a quick convenient connection to CARDBUS. Operates as an extender card for your module under test. The module under test can be powered by the system or with an external power supply.

Disassembly: Class, Sub-Class, and Prog. I/F information is displayed in hexadecimal form, but then is further decoded to tell the user exactly what Class and Sub-Class of device is being accessed (Mass Storage, Display, Network, etc.). The command and status registers are decoded, the bit-level information displayed in easily understood form. Disassembly Screen Shot #1 is a screen shot showing both of these features, with Disassembly Screen Shot #2 showing the read from the status register and the setting of a control bit through a Configuration Write.

Invalid data bytes are dashed out during valid Data Cycles.

There are also 3 Select Fields in the Define Format menu of the Disassembly Display. These fields permit choosing whether I/O, Memory, and Configuration Cycles are highlighted or displayed normally. Changing the Display Format from Hardware to Software, Control Flow, or Subroutine will suppress the display of those cycles that are set to Normal mode. This permits focusing in on information that is of interest.

Timing Analysis: By acquiring data in asynchronous mode on the Tektronix Logic Analyzer, high speed accurate timing measurements can be made of CardBus up to 2Ghz (500 ps) using a Tek TLA700 system. Please refer to the Timing Screen Shot below.

Correlating Bus Activity: While the NEX-CARDBUS package is being used to monitor CARDBUS activity, another acquisition module can be used to monitor activity elsewhere in the system. The results of the two acquisitions can be correlated in time to determine the sequence of actions that occurred. For instance, the system microprocessor could be monitored and correlated with bus activity to verify the proper response to an external interrupt condition.

LAs Supported / Channel Count Requirement

Extender Board	TLA600/700 Support (Can be used with TLA7L/M/N/P or Q cards)	DAS9200 & TLA500 (92A96/C96) Support	Prism 3000 32 GPX Support	TLA700 Channels Required	Notes
Y	Y	N	N	68	Extender Card