MSP430F643 Datasheet, PDF (91/106 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

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Port P7, P7.3, Input/Output With Schmitt Trigger
To XT2
MSP430F643x
SLAS720B – AUGUST 2010 – REVISED AUGUST 2012
Pad Logic
P7REN.3
P7DIR.3
0
1
P7OUT.3
P7SEL.3
P7IN.3
DV_SS
0
DV_CC
1
1
P7DS.3
0: Low drive
1: High drive
Bus
Keeper
P7.3/XT2OUT
PIN NAME (P5.x)
P7.2/XT2IN
P7.3/XT2OUT
Table 60. Port P7 (P7.2 and P7.3) Pin Functions
x
FUNCTION
P7DIR.x
CONTROL BITS/SIGNALS⁽¹⁾
P7SEL.2
P7SEL.3
2 P7.2 (I/O)
XT2IN crystal mode⁽²⁾
XT2IN bypass mode⁽²⁾
I: 0; O: 1
0
X
X
1
X
X
1
X
3 P7.3 (I/O)
XT2OUT crystal mode⁽³⁾
P7.3 (I/O)⁽³⁾
I: 0; O: 1
0
X
X
1
X
X
1
X
XT2BYPASS
X
0
1
X
0
1
(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.
Copyright © 2010–2012, Texas Instruments Incorporated
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