Kontron VMP1 - Manual (Page 105)

VMP1 JTAG Subsystem
ID 19972, Rev. 0101 Page D - 3 ® PEP Modular Computers GmbH
JTAG Subsystem
Description
All the JTAG capable devices on the VMP1 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
Kahlua
Altera
Logic Universe II
R183
TDI1
TDI
TDX3
TDI
TDI TDI
TDO
TDO TDO
T8
R187
TDO
TDX1
TDI2
R180
R106
3.3V
R94
R181
10k
R104
R116
R107
TDX4
TDX2
Resistor installed
Resistor not installed
Default setting: