mpc5644a Freescale Semiconductor, Inc, mpc5644a Datasheet - Page 107

• Manufacturer Part Number: mpc5644a
• Description: Mpc5644a Microcontroller Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

Electrical characteristics
The tool/debugger must provide at least one TCK clock for the EVTI signal to be
recognized by the MCU. When using the RDY signal to indicate the end of a Nexus
read/write access, ensure that TCK continues to run for at least 1 TCK after leaving the
Update-DR state. This can be just a TCK with TMS low while in the Run-Test/Idle state or
by continuing with the next Nexus/JTAG command. Expect the affect of EVTI and RDY
to be delayed by edges of TCK. Note: RDY is not available in all packages of all devices.
TCK
2
3
2
1
3
Figure 11. JTAG test clock input timing
MPC5644A Microcontroller Data Sheet, Rev. 4
Freescale Semiconductor
Preliminary—Subject to Change Without Notice
107