MSP430F2101 Datasheet, PDF (19/53 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x21x1
MIXED SIGNAL MICROCONTROLLER
SLAS439C − SEPTEMBER 2004 − REVISED JULY 2006
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)
VCC(start)
V(B_IT−)
PARAMETER
(see Figure 8)
(see Figure 8 through Figure 10)
TEST CONDITIONS
dVCC/dt ≤ 3 V/s
dVCC/dt ≤ 3 V/s
Vhys(B_IT−) (see Figure 8)
dVCC/dt ≤ 3 V/s
td(BOR)
t(reset)
(see Figure 8)
Pulse length needed at RST/NMI
pin to accepted reset internally
TA
-40−85°C
105°C
VCC
2.2 V/3 V
MIN TYP MAX
0.7 × V(B_IT−)
1.71
70 130 180
70 130 210
2000
UNIT
V
V
mV
mV
µs
2
µs
NOTES:
1. The current consumption of the brownout module is already included in the ICC current consumption data. The voltage level V(B_IT−)
+ Vhys(B_IT−) is ≤ 1.8V.
2. During power up, the CPU begins code execution following a period of td(BOR) after VCC = V(B_IT−) + Vhys(B_IT−). The default
DCO settings must not be changed until VCC ≥ VCC(min), where VCC(min) is the minimum supply voltage for the desired
operating frequency.
VCC
Vhys(B_IT−)
V(B_IT−)
VCC(start)
1
0
t _d(BOR)
Figure 8. POR/Brownout Reset (BOR) vs Supply Voltage
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