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V
PORST
V
IL
V
IH
V
DD
filtered by
hyst er esi s
filtered by
lowp ass filter
W
FRST
W
NFRST
filtered by
lowp ass filter
W
FRST
unknown reset
state
device under hardware reset
internal
reset
1
2
3a
3b
3c
V
HYS
Figure 7. Noise filtering on reset signal
Table 12. Reset electrical characteristics
Symbol
Parameter
Conditions
Value
Unit
Min
Typ
Max
V
IH
Reset Input high level TTL
3.5 V < VDD_HV_IO < 5.5 V
2.0
—
V
DD_HV_IO
+
0.3
V
V
IL
Reset Input low level TTL
3.5 V < VDD_HV_IO < 3.6 V
V
SS
- 0.3
—
0.6
V
4.5 V < VDD_HV_IO < 5.5 V
V
SS
- 0.3
—
0.8
V
HYS
Reset
Input hysteresis TTL
3.5 V < VDD_HV_IO < 5.5 V
300
—
—
mV
V
IH
PORST
Input high level CMOS
3.5 V < VDD_HV_IO < 5.5 V
0.65 *
V
DD_HV_IO
—
V
DD_HV_IO
+
0.3
V
V
IL
PORST
Input low level CMOS
3.5 V < VDD_HV_IO < 5.5 V
V
SS
- 0.3
—
0.35 *
V
DD_HV_IO
V
V
HYS
PORST
Input hysteresis CMOS
3.5 V < VDD_HV_IO < 5.5 V
0.1 *
V
DD_HV_IO
—
—
mV
V
DD_POR
Minimum supply for strong pulldown
activation
—
—
—
1.2
V
Table continues on the next page...
Reset pad (PORST, RESET) electrical characteristics
SPC5746R Microcontroller Data Sheet, Rev. 6, 06/2017
20
NXP Semiconductors