MSP430FG439 Datasheet, PDF (23/88 Pages) Texas Instruments – Mixed-Signal Microcontrollers

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MSP430FG439, MSP430FG438, MSP430FG437
SLAS380D – APRIL 2004 – REVISED NOVEMBER 2014
VCC
V(SVS_IT-)
V(SVSstart)
V(B_IT-)
VCC(start)
Brownout
1
0
SVSOut
1
0
Set POR
1
0
Vhys(SVS_IT-)
Vhys(B_IT-)
Brownout
Region
Software Sets VLD>0:
SVS is Active
t _d(BOR)
SVS Circuit is Active From VLD > to VCC < V(B_IT-)
td(SVSon)
undefined
td(SVSR)
Figure 5-13. SVS Reset (SVSR) vs Supply Voltage
V _CC
tpw
3V
Brown
Out
Region
t _d(BOR)
2
Rectangular Drop
1.5
Triangular Drop
V _CC(drop)
1
0.5
0
1
10
100
tpw - Pulse Width - ms
1000
V _CC
3V
1 ns
t _pw
1 ns
V _CC(drop)
t_f = t_r
t_f
t_r
t - Pulse Width - ms
Figure 5-14. V_CC(drop) With a Square Voltage Drop and a Triangle Voltage Drop to Generate an SVS Signal
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Specifications
23