MPC5643L datasheet(106/136 Pages) NXP

106 / 136 page

MPC5643L Microcontroller Data Sheet, Rev. 10

Electrical characteristics

NXP Semiconductors

106

3.19.4

Reset sequence — start condition

The impact of the voltage thresholds on the starting point of the internal reset sequence are becoming important if the voltage

rails / signals ramp up with a very slow slew rate compared to the overall reset sequence duration.

3.19.4.1

Destructive reset

Figure 17 shows the voltage threshold that determines the start of the Destructive Reset Sequence, BIST enabled and the start

for the Destructive Reset Sequence, BIST disabled.

Figure 17. Reset sequence start for Destructive Resets

3.19.4.2

External reset via RESET

Figure 18 shows the voltage thresholds that determine the start of the reset sequences initiated by the assertion of RESET as

specified in Table 32.

4 If RESET is configured for long reset (default) and if BIST is enabled via chip configuration data stored in the

shadow sector of the NVM.

5 If RESET is configured for long reset (default) and if BIST is disabled via chip configuration data stored in the

shadow sector of the NVM.

6 If RESET is configured for short reset

7 Internal reset sequence can only be observed by state of RESET if bidirectional RESET functionality is enabled for

the functional reset source which triggered the reset sequence.

Table 33. Voltage Thresholds

Variable name

Value

Vmin

Refer to Table 18

Vmax

Refer to Table 18

Supply Rail

VDD_HV_PMU

TReset, max starts here

TReset, min starts here

Supply Rail

Vmax

Vmin

MPC5643L Datasheet(PDF) 106 Page - NXP Semiconductors