MSP43020X3 Datasheet, PDF (58/92 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F20x3
MSP430F20x2
MSP430F20x1
SLAS491H – AUGUST 2005 – REVISED AUGUST 2011
Port P1 (P1.3) Pin Schematics, MSP430F20x2
SREF2
To ADC 10 VR−
A3
0
VSS
1
INCHx = 3
ADC10AE.3
P1REN.3
Pad Logic
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P1DIR.3
0
1
P1OUT.3
Module X OUT
P1SEL.3
P1IN.3
Module X IN
0
1
EN
D
Direction
0: Input
1: Output
DVSS 0
DVCC 1
1
Bus
Keeper
EN
P1.3/ADC10CLK/
A3/VREF−/VeREF−
P1IRQ.3
P1IE.3
P1IFG.3
EN
Q
Set
P1SEL.3
P1IES.3
Interrupt
Edge
Select
Table 24. Port P1 (P1.3) Pin Functions, MSP430F20x2
PIN NAME (P1.x)
P1.3/ADC10CLK/A3/
VREF-/VeREF-
x
FUNCTION
P1.3⁽³⁾ input/output
N/A
3 ADC10CLK
A3 ⁽⁴⁾
VREF-/VeREF- ^{(4) (5)}
P1DIR.x
0/1
0
1
X
X
CONTROL BITS / SIGNALS⁽¹⁾⁽²⁾
P1SEL.x
ADC10AE.x
0
0
1
0
1
0
X
1
X
1
INCHx
N/A
N/A
N/A
3
N/A
(1) X = Don't care
(2) N/A = Not available or not applicable
(3) Default after reset (PUC/POR)
(4) Setting the ADC10AE.x bit disables the output driver as well as the input Schmitt trigger to prevent parasitic cross currents when
applying analog signals.
(5) An applied voltage is used as negative reference if bit SREF3 in register ADC10CTL0 is set.
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