MSP430F551X_1 Datasheet, PDF (85/115 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

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Port P5, P5.3, Input/Output With Schmitt Trigger
To XT2
MSP430F551x
MSP430F552x
SLAS590D – OCTOBER 2009 – REVISED APRIL 2010
Pad Logic
P5REN.3
P5DIR.3
0
1
P5OUT.3
Module X OUT
P5SEL.3
P5IN.3
Module X IN
0
1
EN
D
DV_SS
0
DV_CC
1
1
P5DS.3
0: Low drive
1: High drive
Bus
Keeper
P5.3/XT2OUT
PIN NAME (P5.x)
P5.2/XT2IN
P5.3/XT2OUT
Table 53. Port P5 (P5.2, P5.3) Pin Functions
x
FUNCTION
P5DIR.x
CONTROL BITS/SIGNALS⁽¹⁾
P5SEL.2
P5SEL.3
2 P5.2 (I/O)
I: 0; O: 1
0
X
XT2IN crystal mode⁽²⁾
X
1
X
XT2IN bypass mode⁽²⁾
X
1
X
3 P5.3 (I/O)
I: 0; O: 1
0
X
XT2OUT crystal mode⁽³⁾
X
1
X
P5.3 (I/O)⁽³⁾
X
1
X
XT2BYPASS
X
0
1
X
0
1
(1) X = Don't care
(2) Setting P5SEL.2 causes the general-purpose I/O to be disabled. Pending the setting of XT2BYPASS, P5.2 is configured for crystal
mode or bypass mode.
(3) Setting P5SEL.2 causes the general-purpose I/O to be disabled in crystal mode. When using bypass mode, P5.3 can be used as
general-purpose I/O.
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