Teledyne LeCroy SAS Sample Test Suite - Manual (Page 10)

SAS Sample Test Suite
SAS Test Description 10
SAS Test Description
Diagram format
Each important behavior will be documented by a ladder diagram as well as text. Most of these
behaviors pertain to handling errors or exceptional conditions within the context of executing a
specific command. A sample diagram is shown below.
It displays three levels of the testing platform. First, the transaction between the over the physical
interface between the initiator/Testing Station and the Device Under Test (DUT). Next the Target
Primitive Logic, which describes the action taken by the logic developed for primitive dword level
action. And finally, the notification event and action that is taken by the Target Protocol following
the SAS protocol requirements.
Diagram legend
The diagrams are used for visualization of the major
functional components, control and data flow of the
SSP link.
The left column of the diagram pertains to the Initiator
functionality. Target functionality is split between
center and right columns. Center column reflects
blocks and functionality implemented in SSP link logic
for Primitives. Right column reflects functionality
implemented in Target device SAS protocol logic.
Graphical shapes, used for different blocks and
functions, are shown to the left.
Arrows are used to show direction of the control and
data flow and events generated by SSP HW.
Primitive
SSP Link