Datasheet

MSP430x22x2, MSP430x22x4
MIXED SIGNAL MICROCONTROLLER
SLAS504B − JULY 2006 − REVISED JULY 2007
31
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
typical characteristics − POR/brownout reset (BOR)
V
CC(drop)
V
CC
3 V
t
pw
0
0.5
1
1.5
2
0.001 1 1000
Typical Conditions
1 ns 1 ns
t
pw
− Pulse Width − μs
V
CC(drop)
− V
t
pw
− Pulse Width − μs
V
CC
= 3 V
Figure 9. V
CC(drop)
Level With a Square Voltage Drop to Generate a POR/Brownout Signal
V
CC
0
0.5
1
1.5
2
V
CC(drop)
t
pw
t
pw
− Pulse Width − μs
V
CC(drop)
− V
3 V
0.001 1 1000
t
f
t
r
t
pw
− Pulse Width − μs
t
f
= t
r
Typical Conditions
V
CC
= 3 V
Figure 10. V
CC(drop)
Level With a Triangle Voltage Drop to Generate a POR/Brownout Signal