MSP430F5259 datasheet(81/107 Pages) TI1

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P5.0/(A8/VeREF+)

P5.1/(A9/VeREF–)

P5SEL.x

P5DIR.x

P5IN.x

To module

From module

P5OUT.x

P5REN.x

Pad Logic

P5DS.x

0: Low drive

1: High drive

Bus

Keeper

to/from Reference

(1)

to ADC10

(1)

INCHx = x

(1)

(1) not available for MSPF430F5258

MSPF430F5256

MSPF430F5254

MSPF430F5252

MSP430F5259, MSP430F5258, MSP430F5257, MSP430F5256

MSP430F5255, MSP430F5254, MSP430F5253, MSP430F5252

www.ti.com

SLAS903A – MAY 2013 – REVISED JULY 2013

Port P5, P5.0 and P5.1, Input/Output With Schmitt Trigger

Table 56. Port P5 (P5.0 and P5.1) Pin Functions

CONTROL BITS AND SIGNALS(1)

PIN NAME (P5.x)

FUNCTION

P5DIR.x

P5SEL.x

REFOUT(2)

P5.0/A8/VeREF+

P5.0 (I/O)(3)

I: 0; O: 1

A8/VeREF+(4)

P5.1/A9/VeREF–

P5.1 (I/O)(3)

I: 0; O: 1

A9/VeREF– (5)

(1)

X = Don't care

(2)

REFOUT resides in the REF module.

(3)

Default condition

(4)

Setting the P5SEL.0 bit disables the output driver and 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 ADC10_A. Channel A8, when selected with

the INCHx bits, is connected to the VeREF+ pin.

(5)

Setting the P5SEL.1 bit disables the output driver and 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 ADC10_A. Channel A9, when selected with the

INCHx bits, is connected to the VeREF- pin.

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