Datasheet

MSP430F42x
MIXED SIGNAL MICROCONTROLLER
SLAS421A − APRIL 2004 − REVISED JUNE 2007
22
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
0
1
V
V
CC(start)
V
hys(B_IT−)
V
CC
t
d(BOR)
(B_IT−)
Figure 6. POR/Brownout Reset (BOR) vs Supply Voltage
V
CC
(drop) − V
0
0.5
1
1.5
2
0.001 1 1000
V = 3 V
Typical Conditions
1 ns 1 ns
t
pw
− Pulse Width − μst
pw
− Pulse Width − μs
cc
V
CC
3 V
V
CC(drop)
t
pw
Figure 7. V
CC(drop)
Level With a Square Voltage Drop to Generate a POR/Brownout Signal
V
CC
3 V
V
CC(drop)
t
pw
0
0.5
1
1.5
2
t
pw
− Pulse Width − μs
0.001 1 1000
t
f
t
r
t
pw
− Pulse Width − μs
t
f
= t
r
V = 3 V
Typical Conditions
cc
V
CC
(drop) − V
Figure 8. V
CC(drop)
Level With a Triangle Voltage Drop to Generate a POR/Brownout Signal