ST20-JPI ST Microelectronics, ST20-JPI Datasheet - Page 8

• Manufacturer Part Number: ST20-JPI
• Description: PC PARALLEL PORT TO JTAG INTERFACE
• Manufacturer: ST Microelectronics

ST20-JPI
3.5
The two coaxial SMB connectors to the left of the LEDs are used to connect the ST20-JPI to a
Logic Analyser. They are used to signal between the Host, Target and Logical Analyser when an
event occurs. If, for instance, an event occurs on the Target processor, the TrigOut signal is
triggered which could start the Logic Analyser tracing an external event, so aiding software/
hardware debugging.
3.6
The ST20-JPI uses a 2.5mm power connector. The voltage range is 8-13V dc.
4
To ensure correct connection to the target processor, the following circuit should be used:
8/10
TrigIn/TrigOut SMB Coaxial Connectors
Power Supply Connector
Recommended Target Circuitry
ST20-JPI
Board PowerOnReset
+V
TrigIn/Out
10K
GND
VCC
GND
TDO
TDI
TMS
TCK
notTRST
TrigIn
TrigOut
notRST
ST20
Target Board