Introduction
Thank you for purchasing the FuturePlus Systems FS2331 DDR SDRAM Logic Analyzer Probe. We believe you will find the FS2331, along with your Agilent Technologies Logic Analyzer, a valuable tool for helping to characterize and debug your
Definitions
DDR Bus Speed
This document will use the following definitions when describing DDR memory speeds:
∙PC1600 or 200Mhz describes DDR DIMMs running at a clock rate on the memory bus differential clock of 100Mhz, which results in a data transfer rate of 200Mhz (or
1.6GBytes/sec throughput). DDR commands are issued at a 100Mhz rate.
∙PC2100 or 266Mhz describes DDR DIMMs running at a clock rate on the memory bus differential clock of 133Mhz, which results in a data transfer rate of 266Mhz (or
2.1GBytes/sec throughput). DDR commands are issued at a 133Mhz rate.
∙PC2700 or 333Mhz describes DDR DIMMs running at a clock rate on the memory bus differential clock of 167Mhz, which results in a data transfer rate of 333Mhz (or
2.7GBytes/sec throughput). DDR commands are issued at a 167Mhz rate.
Probe Cable, Connector Numbering
The FS2331 has 4 connectors that connect to the logic analyzer through 4 logic analyzer adapter cables. These connectors are described as "J1" through "J4". When "Pod <n>" is referenced in this manual it is the logic analyzer cable end that is plugged into "J <n>" of the FS2331 per figure on page 7.
Logic Analyzer Modules
"Module" - A set of logic analyzer cards that have been configured (via internal cables connecting the cards) to operate as a single logic analyzer whose total available channels is the sum of the channels on each card. A trigger within a module can be specified using all of the channels of that module. Each module may be further broken up into "Machines”. A single module may not extend beyond a single 5 card frame.
Logic Analyzer Machines
"Machine" - A set of logic analyzer pods from a logic analyzer module grouped together to operate as a single state or timing analyzer. Each logic analyzer module may be partitioned into up to two independent "Machines" (either two state machines, or a state and a timing machine), and the pods of a module may be assigned freely to either machine. Each state analyzer machine has its own state clock. Turbo mode (333Mhz for 1671x, 400Mhz for 16750/1/2, 600Mhz for 16753/4/5 cards) operation restricts a module to having only one machine. Cross triggering between modules or machines is done via the Intermodule Bus or via the Flag bits, which will communicate across a 16700 frame and its expander, or across multiple frames if the Multiframe product is used.
6
