Datasheet

MSP430F42xA
MIXED SIGNAL MICROCONTROLLER
SLAS587 -- FEBRUARY 2008
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=3V
Typical Conditions
1ns 1ns
t
pw
-- Pulse Width -- μst
pw
-- Pulse Width -- μs
cc
V
CC
3V
V
CC(drop)
t
pw
Figure 7. V
CC(drop)
Level With a Square Voltage Drop to Generate a POR/Brownout Signal
V
CC
3V
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=3V
Typical Conditions
cc
V
CC
(drop) -- V
Figure 8. V
CC(drop)
Level With a Triangle Voltage Drop to Generate a POR/Brownout Signal