MPC5643L datasheet(112/136 Pages) FREESCALE

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MPC5643L Microcontroller Data Sheet, Rev. 8.1

Electrical characteristics

Freescale Semiconductor

112

Figure 24. JTAG boundary scan timing

3.20.4

Nexus timing

Table 37. Nexus debug port timing1

1 JTAG specifications in this table apply when used for debug functionality. All Nexus timing relative to MCKO is

measured from 50% of MCKO and 50% of the respective signal.

No.

Symbol

Parameter

Conditions Min

Max

Unit

1tMCYC

D MCKO Cycle Time

—

15.6

—

2tMDC

D MCKO Duty Cycle

—

3tMDOV

D MCKO Low to MDO, MSEO, EVTO Data Valid2

2 For all Nexus modes except DDR mode, MDO, MSEO, and EVTO data is held valid until next MCKO low cycle.

—

–0.1

0.25 tMCYC

4tEVTIPW

DEVTI Pulse Width

—

4.0

—

tTCYC

5tEVTOPW

DEVTO Pulse Width

—

tMCYC

6tTCYC

D TCK Cycle Time3

—

62.5

—

7tTDC

D TCK Duty Cycle

—

8tNTDIS, tNTMSS D TDI, TMS Data Setup Time

—

tNTDIH, tNTMSH D TDI, TMS Data Hold Time

—

tJOV

D TCK Low to TDO/RDY Data Valid

TCK

Output

Signals

Input

Signals

Output

Signals

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