Datasheet

MSP430F471x3, MSP430F471x6, MSP430F471x7
MIXED SIGNAL MICROCONTROLLER
SLAS626C -- OCTOBER 2008 -- REVISED MARCH 2011
36
POST OFFICE BOX 655303  DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
POR/brownout reset (BOR) (see Notes 1 and 2)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
V
CC(start)
(See Figure 8) dV
CC
/dt  3V/s 0.7  V
(B_IT--)
V
V
(B_IT--)
(See Figure 8 through Figure 10) dV
CC
/dt  3V/s 1.71 V
V
hys(B_IT--)
(See Figure 8) dV
CC
/dt  3V/s 70 130 180 mV
t
d(BOR)
(See Figure 8) 2000 s
t
(reset)
Pulse length needed at RST/NMI pin
to accepted reset internally
2.2 V/3 V 2 s
NOTES: 1. The current consumption of the brownout module i s already included in the I
CC
current consumption data.
The voltage level V
(B_IT--)
+V
hys(B_IT--)
is  1.8 V.
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/SVS circuit.
0
1
t
d(BOR)
V
CC
V
(B_IT--)
V
hys(B_IT--)
V
CC(start)
Figure 8. POR/Brownout Reset (BOR) vs Supply Voltage