MPC5645S datasheet(104/146 Pages) FREESCALE

104 / 146 page

Qorivva MPC5645S Microcontroller Data Sheet, Rev. 8

104

Freescale Semiconductor

4.18.2

Nexus Debug Interface

Figure 19. Nexus Output Timing

Table 54. 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. Nexus timing specified at VDD = 3.0 V to 3.6 V, TA = -40 to 105 °C, and CL =

50 pF (Cl=30 pF on MCKO), with SRC = 0b10 for MCKO and 0b11 for others.

Num

Symbol

Characteristic

Min

Max

Unit

SpecID

1tMCYC

CC2

2 Parameter values guaranteed by design.

D MCKO Cycle Time

—

A2.1

2tMDC

CC2

D MCKO Duty Cycle

A2.2

3tMDOV

CC2

D MCKO Low to MDO Data Valid3

3 MDO, MSEO, and EVTO data is held valid until next MCKO low cycle.

0.1

0.2

tMCYC

A2.3

4tMSEOV

CC2

D MCKO Low to MSEO Data Valid3

0.1

0.2

tMCYC

A2.4

5tEVTOV

CC2

D MCKO Low to EVTO Data Valid3

0.1

0.2

tMCYC

A2.5

6tEVTIPW

CC2

D EVTI Pulse Width

—

tTCYC

A2.6

7tEVTOPW

CC2

D EVTO Pulse Width

—

tMCYC

A2.7

8tTCYC

CC2

D TCK Cycle Time4

4 The system clock frequency needs to be three times faster that the TCK frequency.

NOTE

Nexus Dual Data Rate is not supported. The timings are mentioned for dedicated pins on

416BGA. The max value for #2, 3 and 4 above, are 0.3 of tMCYC for shared nexus ports.

100

—

A2.8

9tTDC

CC2

D TCK Duty Cycle

A2.9

tNTDIS, tNTMSS CC

D TDI, TMS Data Setup Time

—

A2.10

tNTDIH,

tNTMSH

CC2

D TDI, TMS Data Hold Time

—

A2.11

tJOV

CC2

D TCK Low to TDO Data Valid

A2.12

MCKO

MDO

MSEO

EVTO

Output Data Valid

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