MSP430F6638IPZ datasheet(102/133 Pages) TI

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9.13.9 Port P7 (P7.3) Input/Output With Schmitt Trigger

Figure 9-10 shows the pin diagram. Table 9-59 summarizes how to select the pin function.

P7.3/XT2OUT

P7DIR.3

P7IN.3

P7OUT.3

P7REN.3

Pad Logic

P7DS.3

0: Low drive

1: High drive

Bus

Keeper

To XT2

P7SEL.2

XT2BYPASS

P7SEL.3

Figure 9-10. Port P7 (P7.3) Diagram

Table 9-59. Port P7 (P7.2 and P7.3) Pin Functions

PIN NAME (P5.x)

FUNCTION

CONTROL BITS OR SIGNALS(1)

P7DIR.x

P7SEL.2

P7SEL.3

XT2BYPASS

P7.2/XT2IN

P7.2 (I/O)

I: 0; O: 1

XT2IN crystal mode(1)

XT2IN bypass mode(1)

P7.3/XT2OUT

P7.3 (I/O)

I: 0; O: 1

XT2OUT crystal mode(2)

P7.3 (I/O)(2)

(1)

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.

(2)

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.

MSP430F6638, MSP430F6637, MSP430F6636, MSP430F6635, MSP430F6634

MSP430F6633, MSP430F6632, MSP430F6631, MSP430F6630

SLAS566G – JUNE 2010 – REVISED SEPTEMBER 2020

www.ti.com

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