0
1
t d(BOR)
VCC
V(B_IT−)
Vhys(B_IT−)
V
CC(start)
MSP430F22x2
MSP430F22x4
www.ti.com
SLAS504G – JULY 2006 – REVISED AUGUST 2012
POR/Brownout Reset (BOR)
(1) (2)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
0.7 ×
V
CC(start)
See
Figure 8
dV
CC
/dt
≤
3 V/s
V
V
(B_IT-)
V
(B_IT-)
See
Figure 8
through
Figure 10
dV
CC
/dt
≤
3 V/s
1.71
V
V
hys(B_IT-)
See
Figure 8
dV
CC
/dt
≤
3 V/s
70
130
210
mV
t
d(BOR)
See
Figure 8
2000
µs
Pulse length needed at RST/NMI pin
t
(reset)
3 V
2
µs
to accepted reset internally
(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.
Figure 8. POR/Brownout Reset (BOR) vs Supply Voltage
Copyright © 2006–2012, Texas Instruments Incorporated
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