Datasheet

MSP430C11x1, MSP430F11x1A
MIXED SIGNAL MICROCONTROLLER
SLAS241I − SEPTEMBER 1999 − REVISED DECEMBER 2008
22
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
PUC/POR
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
(POR_Delay)
Internal time delay to release POR 150 250 μs
V
CC
threshold at which POR
T
A
= −40°C 1.4 1.8
V
POR
V
CC
threshold
at
which
POR
release delay time begins
T
A
= 25°C 1.1 1.5
V
V
POR
release
delay
time
begins
(see Note 1)
T
A
= 85°C
V
CC
= 2.2 V/3 V
0.8 1.2
V
V
(min)
V
CC
threshold required to
generate a POR (see Note 2)
V
CC
|dV/dt| ≥ 1V/ms 0.2 V
t
(reset)
RST/NMI low time for PUC/POR Reset is accepted internally 2 μs
NOTES: 1. V
CC
rise time dV/dt ≥ 1V/ms.
2. When driving V
CC
low in order to generate a POR condition, V
CC
should be driven to 200mV or lower with a dV/dt equal to or less
than −1V/ms. The corresponding rising V
CC
must also meet the dV/dt requirement equal to or greater than +1V/ms.
VCC
POR
V
t
V
POR
V
(min)
POR
No POR
Figure 10. Power-On Reset (POR) vs Supply Voltage
0
0.2
0.6
1.0
1.2
1.8
2.0
−40 −20 0 20 40 60 80
Temperature [°C]
V POR [V]
1.6
1.4
0.8
0.4
1.2
1.5
1.8
0.8
1.1
1.4
25°C
Max
Min
Figure 11. V
POR
vs Temperature