Designing A Target System For The Emulation Module; Debug Port Connections - HP 16600A Series User Manual

Chapter 6: Connecting and Configuring the Emulation Module

Designing a Target System for the Emulation Module

Designing a Target System for the Emulation
Module

Debug port connections

If you plan to connect the emulation module directly to the target
system, the target system should have a debug port (BDM) connector.
The connector should be a dual row header strip ("Berg connector"),
10 pins per inch, with 25 mil pins.
Some of the signals at the BDM port share the same lines, as shown in
the diagrams on the following pages.
When deciding whether to use an 8-pin or a 10-pin BDM port, consider
how often you are likely to encounter "hung" bus cycles. If you are
using an 8-pin BDM port, and a target bus cycle fails to terminate, you
will need to reset the target system. If you use a 10-pin BDM port, the
emulator will detect and terminate the "hung" cycle.
Therefore if your target system does not have a good bus monitor, or if
you are not using the built-in bus monitor, you should use a 10-pin
BDM port to take advantage of the DS and BERR signals.
The emulation module adds about 40 pF to all target system signals
routed to the debug connector. This added capacitance may reduce the
rise time of some signals beyond the processor specifications. If so, the
target may need to increase the pull-up current on these signal lines.
130 Solutions for CPU32