Debug and Logic Analyzer Mode
5 Debug and Logic Analyzer Mode
5.1
Logic Analyzer Interface (LAI) Mode
This section describes the functionality of the optional Logic Analyzer Mode for the Intel
6400/6402 Advanced Memory Buffer (AMB).
The features of the logic analyzer mode (LAI mode) in the Fully Buffered DIMM will
enable select bus observability capabilities. The mode will be the basis of an LAI
assembly to provide link traffic trace capability and will support design and
manufacturing debug and validation needs for systems featuring FBD links. In this
application, the device is programmed to perform the following functions:
• Repeater pass-through operation for southbound and northbound links
• Provides enough link protocol unwinding to allow extraction of framing boundaries,
idle filtering opportunities, and pattern match triggering
• Performs logic analysis functions such as cross-triggering, match/mask, and local
event detection. These functions cannot be effectively performed using a remote
logic analyzer.
• Provides independent demuxed northbound and southbound traffic stream in LA
compatible signal levels and timing format through reuse of the existing device
DRAM I/O pins
• Provides SMB (or possibly another communications interface) access to allow
external, non-intrusive access to component LAI control functions/parameters
• The AMB is commanded to power up in LAI mode when SMA[3:2] addresses are
strapped to 2’b11 and LAI capability bit is enabled.
Intel® 6400/6402 Advanced Memory Buffer Datasheet
53
INTEL [ INTEL ]
