Datasheet

MSP430F42xA
MIXED SIGNAL MICROCONTROLLER
SLAS587 -- FEBRUARY 2008
24
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
V
CC(start)
V
CC
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
1ns 1ns
t
pw
-- Pulse Width -- μs
1 10 1000
t
f
t
r
t -- Pulse Width -- μs
100
t
f=
t
r
Rectangular Drop
V
CC(drop)
-- V
Triangular Drop
3V
V
CC
t
pw
3V
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