MSP430X47X3_07 Datasheet, PDF (30/76 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x47x3, MSP430x47x4
MIXED SIGNAL MICROCONTROLLER
SLAS545A − MAY 2007 − REVISED DECEMBER 2007
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)
V_CC(start)
V_{(B_IT−)}
V_{hys(B_IT−)}
t_d(BOR)
t_(reset)
PARAMETER
(see Figure 8)
(see Figure 8 through Figure 10)
(see Figure 8)
(see Figure 8)
Pulse length needed at RST/NMI pin
to accepted reset internally
TEST CONDITIONS
dV_CC/dt ≤ 3 V/s
dV_CC/dt ≤ 3 V/s
dV_CC/dt ≤ 3 V/s
VCC
2.2 V/3 V
MIN TYP MAX
0.7 × V_{(B_IT−)}
1.71
70 130 180
2000
UNIT
V
V
mV
μs
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/SVS circuit.
VCC
Vhys(B_IT_−)
V(B_IT_−)
V_CC(start)
1
0
t _d(BOR)
Figure 8. POR/Brownout Reset (BOR) vs Supply Voltage
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