MPC5644BCAMMJ1 datasheet(95/116 Pages) NXP

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Electrical Characteristics

MPC5646C Microcontroller DataSheet, Rev. 7

NXP Semiconductors

Figure 33. DSPI PCS strobe (PCSS) timing

4.19.3

Nexus characteristics

Table 50. 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 VDDE =4.0–5.5 V,

TA =TL to TH, and CL = 30 pF with SRC = 0b11.

Spec

Characteristic

Symbol

Min

Max

Unit

MCKO Cycle

Time2

2 MCKO can run up to 1/2 of full system frequency. It can also run at system frequency when it is <60 MHz.

tMCYC

16.3

—

MCKO Duty Cycle

tMDC

MCKO Low to

MDO, MSEO,

EVTO Data Valid3

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

tMDOV

–0.1

0.25

tMCYC

EVTI Pulse Width

tEVTIPW

4.0

—

tTCYC

EVTO Pulse

Width

tEVTOPW

1tMCYC

TCK Cycle Time4

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

tTCYC

—

TCK Duty Cycle

tTDC

TDI, TMS Data

Setup Time

tNTDIS, tNTMSS

8—

TDI, TMS Data

Hold Time

tNTDIH, tNTMSH

5—

TCK Low to TDO

Data Valid

tJOV

025

CSx

PCSS

Note: Numbers shown reference Table 49.

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