MSP430F5529 datasheet(83/115 Pages) TI

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P5.0/(A8/VREF+/VeREF+)

P5.1/(A9/VREF–/VeREF–)

P5SEL.x

P5DIR.x

P5IN.x

Tomodule

Frommodule

P5OUT.x

P5REN.x

PadLogic

P5DS.x

0:Lowdrive

1:Highdrive

Bus

Keeper

to/fromReference

(n/aMSP430F551x)

to ADC12

INCHx=x

(n/aMSPF430F551x)

MSP430F551x

MSP430F552x

www.ti.com

SLAS590D – OCTOBER 2009 – REVISED APRIL 2010

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

Table 52. Port P5 (P5.0 and P5.1) Pin Functions

CONTROL BITS/SIGNALS(1)

PIN NAME (P5.x)

FUNCTION

P5DIR.x

P5SEL.x

REFOUT

P5.0/A8/VREF+/VeREF+(2)

P5.0 (I/O)(3)

I: 0; O: 1

A8/VeREF+(4)

A8/VREF+(5)

P5.1/A9/VREF–/VeREF– (6)

P5.1 (I/O)(3)

I: 0; O: 1

A9/VeREF– (7)

A9/VREF–(8)

(1)

X = Don't care

(2)

VREF+/VeREF+ available on MSP430F552x devices only.

(3)

Default condition

(4)

Setting the P5SEL.0 bit disables the output driver as well as 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 ADC12_A when available. Channel A8,

when selected with the INCHx bits, is connected to the VREF+/VeREF+ pin.

(5)

Setting the P5SEL.0 bit disables the output driver as well as the input Schmitt trigger to prevent parasitic cross currents when applying

analog signals. The VREF+ reference is available at the pin. Channel A8, when selected with the INCHx bits, is connected to the

VREF+/VeREF+ pin.

(6)

VREF-/VeREF- available on MSP430F552x devices only.

(7)

Setting the P5SEL.1 bit disables the output driver as well as 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 ADC12_A when available. Channel A9,

when selected with the INCHx bits, is connected to the VREF-/VeREF- pin.

(8)

Setting the P5SEL.1 bit disables the output driver as well as the input Schmitt trigger to prevent parasitic cross currents when applying

analog signals. The VREF– reference is available at the pin. Channel A9, when selected with the INCHx bits, is connected to the

VREF-/VeREF- pin.

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