MSP430F149 datasheet(44/59 Pages) TI

44 / 59 page

MSP430x13x, MSP430x14x, MSP430x14x1

MIXED SIGNAL MICROCONTROLLER

SLAS272F − JULY 2000 − REVISED JUNE 2004

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

APPLICATION INFORMATION

input/output schematic (continued)

port P3, P3.0 and P3.4 to P3.7, input/output with Schmitt-trigger

P3.0/STE0

P3IN.x

Module X IN

Pad Logic

P3OUT.x

P3DIR.x

P3SEL.x

Module X OUT

Direction Control

From Module

P3.4/UTXD0

P3.5/URXD0

0: Input

1: Output

x: Bit Identifier, 0 and 4 to 7 for Port P3

P3.6/UTXD1‡

P3.7/URXD1¶

PnSel.x

PnDIR.x

DIRECTION

CONTROL

FROM MODULE

PnOUT.x

MODULE X OUT

PnIN.x

MODULE X IN

P3Sel.0

P3DIR.0

DVSS

P3OUT.0

DVSS

P3IN.0

STE0

P3Sel.4

P3DIR.4

DVCC

P3OUT.4

UTXD0†

P3IN.4

Unused

P3Sel.5

P3DIR.5

DVSS

P3OUT.5

DVSS

P3IN.5

URXD0§

P3Sel.6

P3DIR.6

DVCC

P3OUT.6

UTXD1‡

P3IN.6

Unused

P3Sel.7

P3DIR.7

DVSS

P3OUT.7

DVSS

P3IN.7

URXD1¶

† Output from USART0 module

‡ Output from USART1 module in x14x(1) configuration, DVSS in x13x configuration

§ Input to USART0 module

¶ Input to USART1 module in x14x(1) configuration, unused in x13x configuration

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