MSP430F42x
MIXED SIGNAL MICROCONTROLLER
SLAS421A − APRIL 2004 − REVISED JUNE 2007
24
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
VCC(start)
VCC
V(B_IT−)
Brownout
Region
V(SVSstart)
V
Software Sets VLD>0:
SVS is Active
Undefined
0
1
Brownout
0
1
0
1
Set POR
Brownout
Region
SVS Circuit is Active From VLD > to V
CC
< V
(B_IT−)
SVS out
V
hys(SVS_IT−)
V
hys(B_IT−)
t
d(BOR)
t
d(SVSon)
t
d(SVSR)
t
d(BOR)
(SVS_IT−)
Figure 9. SVS Reset (SVSR) vs Supply Voltage
V
CC(drop)
0
0.5
1
1.5
2
1 ns
1 ns
t
pw
− Pulse Width −
μ
s
1
10
1000
t
f
t
r
t − Pulse Width −
μ
s
100
t
f
= t
r
Rectangular Drop
V
CC(drop)
− V
Triangular Drop
3 V
V
CC
t
pw
3 V
V
CC
t
pw
V
CC(drop)
Figure 10. V
CC(drop)
With a Square Voltage Drop and a Triangle Voltage Drop to Generate an SVS Signal
