PXS20 Datasheet, PDF (100/119 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Electrical characteristics
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 18 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.
V
V_max
V_min
Supply Rail
T_{Reset, max} starts here
t
T_{Reset, min} starts here
Figure 18. Reset sequence start for Destructive Resets
Table 31. Voltage Thresholds
Variable name
V_min
Value
Refer to Table 16
V_max
Refer to Table 16
Supply Rail
VDD_HV_PMU
3.19.4.2 External reset via RESET
Figure 19 shows the voltage thresholds that determine the start of the reset sequences initiated by the assertion of RESET as
specified in Table 30.
PXS20 Microcontroller Data Sheet, Rev. 1
100
Freescale Semiconductor
Preliminary—Subject to Change Without Notice