MSP430F663x
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SLAS566C –JUNE 2010–REVISED AUGUST 2012
Port P7, P7.3, Input/Output With Schmitt Trigger
Pad Logic
To XT2
P7REN.3
DVSS
DVCC
0
1
1
P7DIR.3
P7OUT.3
0
1
P7.3/XT2OUT
P7DS.3
0: Low drive
1: High drive
P7SEL.3
P7IN.3
Bus
Keeper
Table 62. Port P7 (P7.2 and P7.3) Pin Functions
CONTROL BITS/SIGNALS(1)
PIN NAME (P5.x)
x
FUNCTION
P7DIR.x
P7SEL.2
P7SEL.3
XT2BYPASS
P7.2/XT2IN
2
P7.2 (I/O)
I: 0; O: 1
0
1
1
0
1
1
X
X
X
X
X
X
X
0
1
X
0
1
XT2IN crystal mode(2)
XT2IN bypass mode(2)
P7.3 (I/O)
XT2OUT crystal mode(3)
P7.3 (I/O)(3)
X
X
P7.3/XT2OUT
3
I: 0; O: 1
X
X
(1) X = Don't care
(2) Setting P7SEL.2 causes the general-purpose I/O to be disabled. Pending the setting of XT2BYPASS, P7.2 is configured for crystal
mode or bypass mode.
(3) Setting P7SEL.2 causes the general-purpose I/O to be disabled in crystal mode. When using bypass mode, P7.3 can be used as
general-purpose I/O.
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