PXS20 Datasheet, PDF (102/119 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Electrical characteristics
• Input conditions: All Inputs: tr, tf = 1 ns
• Output Loading: All Outputs: 50 pF
3.20.1 RESET pin characteristics
The PXS20 implements a dedicated bidirectional RESET pin.
V_DD
V_DDMIN
RESET
V_IH
V_IL
V_RESET
V_DD
device reset forced by RESET
device start-up phase
Figure 21. Start-up reset requirements
hw_rst
‘1’
V_IH
V_IL
‘0’
filtered by ^{filtered by}
hysteresis ^{lowpass filter}
filtered by
unknown reset
lowpass filter state
device under hardware reset
W_FRST
W_FRST
W_NFRST
Figure 22. Noise filtering on reset signal
PXS20 Microcontroller Data Sheet, Rev. 1
102
Freescale Semiconductor
Preliminary—Subject to Change Without Notice