Datasheet

MSP430x43x1, MSP430x43x, MSP430x44x1, MSP430x44x
MIXED SIGNAL MICROCONTROLLER
SLAS344G − JANUARY 2002 − REVISED OCTOBER 2009
47
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
typical characteristics
V
CC(start)
V
CC
V
(B_IT−)
Brownout
Region
V
(SVSstart)
V
(SVS_IT−)
Software Sets VLD>0:
SVS is Active
t
d(SVSR)
undefined
V
hys(SVS_IT−)
0
1
t
d(BOR)
Brownout
0
1
t
d(SVSon)
t
d(BOR)
0
1
Set POR
Brown-
Out
Region
SVS Circuit is Active From VLD > to V
CC
< V(
B_IT−)
SVS
Out
V
hys(B_IT−)
Figure 13. SVS Reset (SVSR) vs Supply Voltage
0
0.5
1
1.5
2
V
CC
V
CC
1 ns 1 ns
V
CC(drop)
t
pw
t
pw
− Pulse Width − µs
V
CC(drop)
− V
3 V
1 10 1000
t
f
t
r
t − Pulse Width − µs
100
t
pw
3 V
t
f
= t
r
Rectangular Drop
Triangular Drop
V
CC(drop)
Figure 14. V
CC(drop)
With a Square Voltage Drop and a Triangle Voltage Drop to Generate an SVS Signal