mpc8555e Freescale Semiconductor, Inc, mpc8555e Datasheet - Page 83

• Manufacturer Part Number: mpc8555e
• Description: Mpc8555e Powerquicc Iii Processor With Integrated Security
• Manufacturer: Freescale Semiconductor, Inc

17.8.1 Termination of Unused Signals
If the JTAG interface and COP header are not used, Freescale recommends the following connections:
Freescale Semiconductor
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TRST should be tied to HRESET through a 0 kΩ isolation resistor so that it is asserted when the
system reset signal (HRESET) is asserted, ensuring that the JTAG scan chain is initialized during
the power-on reset flow. Freescale recommends that the COP header be designed into the system
as shown in
case a JTAG interface may need to be wired onto the system in future debug situations.
Tie TCK to OV
incorrect data into the device.
No connection is required for TDI, TMS, or TDO.
MPC8555E PowerQUICC™ III Integrated Communications Processor Hardware Specification, Rev. 4.2
Figure
DD
through a 10 kΩ resistor. This prevents TCK from changing state and reading
53. If this is not possible, the isolation resistor allows future access to TRST in
System Design Information
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