Datasheet

MSP430F21x2
SLAS578J –NOVEMBER 2007– REVISED JANUARY 2012 www.ti.com
Schmitt-Trigger Inputs (Ports P1, P2, P3, JTAG, RST/NMI, XIN
(1)
)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
0.45 V
CC
0.75 V
CC
V
IT+
Positive-going input threshold voltage 2.2 V 1 1.65 V
3 V 1.35 2.25
0.25 V
CC
0.55 V
CC
V
IT-
Negative-going input threshold voltage 2.2 V 0.55 1.20 V
3 V 0.75 1.65
2.2 V 0.2 1
V
hys
Input voltage hysteresis (V
IT+
- V
IT-
) V
3 V 0.3 1
For pullup: V
IN
= V
SS
,
R
Pull
Pullup/pulldown resistor 20 35 50 kΩ
For pulldown: V
IN
= V
CC
C
I
Input capacitance V
IN
= V
SS
or V
CC
5 pF
(1) XIN only in bypass mode
Inputs (Ports P1, P2)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
Port P1, P2: P1.x to P2.x, External trigger
t
(int)
External interrupt timing 2.2 V/3 V 20 ns
pulse width to set interrupt flag
(1)
(1) An external signal sets the interrupt flag every time the minimum interrupt pulse width t
(int)
is met. It may be set with trigger signals
shorter than t
(int)
.
Leakage Current (Ports P1, P2, P3)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
I
lkg(Px.y)
High-impedance leakage current
(1) (2)
2.2 V/3 V ±50 nA
(1) The leakage current is measured with V
SS
or V
CC
applied to the corresponding pin(s), unless otherwise noted.
(2) The leakage of the digital port pins is measured individually. The port pin is selected for input and the pullup/pulldown resistor is
disabled.
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