Datasheet

MSP430F15x, MSP430F16x, MSP430F161x
MIXED SIGNAL MICROCONTROLLER
SLAS368G − OCTOBER 2002 − REVISED MARCH 2011
33
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electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
POR/brownout reset (BOR) (see Notes 1 and 2)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
d(BOR)
2000 μs
V
CC(Start)
dV
CC
/dt ≤ 3 V/s (see Figure 10) 0.7 × V
(B_IT−)
V
V
(B_IT−)
Brownout
dV
CC
/dt ≤ 3 V/s (see Figure 10 through Figure 12) 1.71 V
V
hys(B_IT−)
B
rownout
dV
CC
/dt ≤ 3 V/s (see Figure 10) 70 130 180 mV
t
(reset)
Pulse length needed at RST/NMI pin to accepted reset internally,
V
CC
= 2.2 V/3 V
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 ≤ 1.8 V.
2. During power up, the CPU begins code execution following a period of t
BOR(delay)
after V
CC
= V
(B_IT−)
+ V
hys(B_IT−)
. The
default DCO 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 MSP430x1xx Family User’s Guide (SLAU049) for more information on the brownout/SVS circuit.
typical characteristics
0
1
t
d(BOR)
V
CC
V
(B_IT−)
V
hys(B_IT−)
V
CC(Start)
BOR
Figure 10. POR/Brownout Reset (BOR) vs Supply Voltage