MPC5200 datasheet(17/80 Pages) FREESCALE

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Electrical and Thermal Characteristics

MPC5200 Data Sheet, Rev. 4

Freescale Semiconductor

For additional information, see the MPC5200 User Manual [1].

NOTE

Make sure that the PORRESET does not carry any glitches. The MPC5200

has no filter to prevent them from getting into the chip.

NOTE

HRESET and SRESET must have a monotonous rise time.

3.3.3.1

Reset Configuration Word

During reset (HRESET and PORRESET) the Reset Configuration Word is cached in the related Reset

Configuration Word Register with each rising edge of the SYS_XTAL signal. If both resets (HRESET and

PORRESET) are inactive (high), the contents of this register get locked after two further SYS_XTAL

cycles (see Figure 3).

Figure 3. Reset Configuration Word Locking

Table 15. Reset Rise / Fall Timing

Description

Min

Max

Unit

SpecID

PORRESET fall time

—

A3.4

PORRESET rise time

—

A3.5

HRESET fall time

—

A3.6

HRESET rise time

—

A3.7

SRESET fall time

—

A3.8

SRESET rise time

—

A3.9

sample

LOCK

RST_CFG_WRD

HRESET

PORRESET

SYS_XTAL

4096 clocks

2 clocks

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