MSP430F663x
SLAS566C –JUNE 2010–REVISED AUGUST 2012
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Port P5, P5.0 and P5.1, Input/Output With Schmitt Trigger
Pad Logic
To/From
Reference
P5REN.x
DVSS
DVCC
0
1
1
P5DIR.x
0
1
P5OUT.x
0
1
Module X OUT
P5.0/VREF+/VeREF+
P5.1/VREF–/VeREF–
P5DS.x
0: Low drive
1: High drive
P5SEL.x
P5IN.x
Bus
Keeper
EN
D
Module X IN
Table 59. Port P5 (P5.0 and P5.1) Pin Functions
CONTROL BITS/SIGNALS(1)
PIN NAME (P5.x)
x
FUNCTION
P5DIR.x
P5SEL.x
REFOUT
P5.0/VREF+/VeREF+
0
P5.0 (I/O)(2)
VeREF+(3)
VREF+(4)
P5.1 (I/O)(2)
VeREF–(5)
VREF–(6)
I: 0; O: 1
0
1
1
0
1
1
X
0
1
X
0
1
X
X
P5.1/VREF–/VeREF–
1
I: 0; O: 1
X
X
(1) X = Don't care
(2) Default condition
(3) Setting the P5SEL.0 bit disables the output driver as well as the input Schmitt trigger to prevent parasitic cross currents when applying
analog signals. An external voltage can be applied to VeREF+ and used as the reference for the ADC12_A, Comparator_B, or
DAC12_A.
(4) Setting the P5SEL.0 bit disables the output driver as well as the input Schmitt trigger to prevent parasitic cross currents when applying
analog signals. The ADC12_A, VREF+ reference is available at the pin.
(5) Setting the P5SEL.1 bit disables the output driver as well as the input Schmitt trigger to prevent parasitic cross currents when applying
analog signals. An external voltage can be applied to VeREF- and used as the reference for the ADC12_A, Comparator_B, or
DAC12_A.
(6) Setting the P5SEL.1 bit disables the output driver as well as the input Schmitt trigger to prevent parasitic cross currents when applying
analog signals. The ADC12_A, VREF– reference is available at the pin.
90
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