MSP430AFE2X3 Datasheet, PDF (21/47 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

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MSP430AFE2x3
MSP430AFE2x2
MSP430AFE2x1
SLAS701A – NOVEMBER 2010 – REVISED MARCH 2011
POR/Brownout Reset (BOR)^{(1) (2)}
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
V_CC(start)
V_{(B_IT-)}
V_{hys(B_IT-)}
t_d(BOR)
t_(reset)
PARAMETER
TEST CONDITIONS
See Figure 9
See Figure 9 through Figure 11
See Figure 9
See Figure 9
Pulse length needed at RST/NMI pin
to accepted reset internally
dV_CC/dt ≤ 3 V/s
dV_CC/dt ≤ 3 V/s
dV_CC/dt ≤ 3 V/s
V_CC
MIN
TYP
0.7 ×
V_{(B_IT-)}
1.42
120
2000
3V
2
MAX UNIT
V
V
mV
µs
µs
(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_d(BOR) 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.
VCC
Vhys(B_IT−)
V(B_IT−)
V_{CC(s t ar t )}
1
0
t _d(BOR)
Figure 9. POR/Brownout Reset (BOR) vs Supply Voltage
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