Datasheet

MSP430F47x
MIXED SIGNAL MICROCONTROLLER
SLAS629A -- MARCH 2009 -- REVISED APRIL 2009
30
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
wake-up LPM3
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
f=1MHz 6
t
d
(
LPM3
)
Delay time
f=2MHz
V
CC =
2.2 V/3 V
6
µs
t
d
(
L
P
M
3
)
D
e
l
a
y
t
i
m
e
f=3MHz
V
C
C
=
2
.
2
V
/
3
V
6
µ
s
POR/brownout reset (BOR) (see Note 1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
d(BOR)
2000 µs
V
CC(start)
dV
CC
/dt ≤ 3 V/s (see Figure 7) 0.7 × V
(B_IT--)
V
V
(B_IT--)
Brownout
dV
CC
/dt ≤ 3 V/s (see Figure 7 through Figure 9) 1.71 V
V
hys(B_IT--)
(see Note 2)
dV
CC
/dt ≤ 3 V/s (see Figure 7) mV
t
(reset)
Pulse length needed at RST/NMI pin to accepted reset internally,
V
CC
=2.2V/3V
2 µs
NOTES: 1. The current consumption of the brownout module is already included in the I
CC
current consumption data. The voltage level
V
(B_IT--)
+V
hys(B_IT--)
is ≤ 1.8V.
2. During power up, the CPU begins code execution following a period of t
d(BOR)
after V
CC
=V
(B_IT--)
+V
hys(B_IT--)
. The default
FLL+ settings must not be changed until V
CC
≥ V
CC(min)
, where V
CC(min)
is the minimum supply voltage for the desired
operating frequency. See the MSP430x4xx Family User’s Guide (SLAU056) for more information on the brownout.
typical characteristics
0
1
t
d(BOR)
V
CC
V
(B_IT--)
V
hys(B_IT--)
V
CC(start)
Figure 7. POR/Brownout Reset (BOR) vs Supply Voltage