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TOOLS
16.2.1. Primary Function
The primary function of an ITP is to provide a control and query interface for up to four Pentium
Pro processors in one cluster. With an ITP you can control program execution and have the abil-
ity to access processor registers, system memory and I/O. Thus, you can start and stop program
execution using a variety of breakpoints, single-step your program at the assembly code level,
as well as read and write registers, memory and I/O.
16.2.2. Debug Port Connector Description
An ITP will connect to the Pentium Pro processor system through the debug port. Intel recom-
mended connectors, to mate an ITP cable with the debug port on your board, are available in
either a vertical or right-angle configuration. Both configurations fit into the same board foot-
print. The connectors are manufactured by AMP Incorporated and are in their AMPMODU
System 50 line. Following are the AMP part numbers for the two connectors:
•
Amp 30-pin shrouded vertical header: 104068-3
•
Amp 30-pin shrouded right-angle header: 104069-5
These are high density through hole connectors with pins on 0.050" by 0.100"
centers. Do not confuse these with the more common 0.100" by 0.100" center
headers.
16.2.3. Debug Port Signal Descriptions
Table 16-1 describes the debug port signals and provides the pin assignment. The mechanical
pinout is shown in Section 16.2.5.2., "Debug Port Connector".
Name
Pin
RESET#
1
DBRESET#
3
TCK
5
TMS
7
TDI
8
POWERON
9
TDO
10
16-2
NOTE
Table 16-1. Debug Port Pinout
Reset signal from MP cluster to ITP. See signal note 1
Open drain output from ITP to the system; should be tied into system
reset circuitry. This allows the ITP to reset the entire target system. See
signal note 2
Boundary scan signal from ITP to MP cluster
Boundary scan signal from ITP to MP cluster
Signal from ITP to first component in boundary scan chain of MP cluster
From target Vtt to ITP (through a resistor). See signal note 3
Signal from last component in boundary scan chain of MP cluster to ITP
Description
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