Kontron VMP2 - Manual (Page 127)

VMP2 JTAG Subsystem
ID 24855, Rev. 02 Page D - 3 © 2002 PEP Modular Computers GmbH
D. JTAG Subsystem
Description
All the JTAG capable devices on the VMP2 can be accessed through the onboard JTAG
chain. The factory setting of the chain is such that only the onboard logic is in the chain.
If it is required to access the Processor via the JTAG chain a different setting must be
used (some resistors must be reset).
The following picture illustrates the construction of the JTAG chain.
Figure D-1: JTAG Chain Illustration
MPC8245
Altera
Logic 21154
R260
TDI1
TDI
TDX3
TDI
TDI TDI
TDO
TDO TDO
R185
TDO
TDX1
TDI2
R250
R182
3.3V
R188
R249
10k
R163
R198
R189
TDX2
TDX4
Resistor installed
Resistor not installed
Default setting: