MSP430x11x

MIXED SIGNAL MICROCONTROLLERS

SLAS196D− DECEMBER 1998 − REVISED SEPTEMBER 2004

21

POST OFFICE BOX 655303

APPLICATION INFORMATION

input/output schematic

Port P1, P1.0 to P1.3, input/output with Schmitt-trigger

EN

D

(See Note 1)

(See Note 2)

(See Note 2)

(See Note 1)

GND

VCC

P1.0 − P1.3

0

1

0

1

Interrupt

Edge

Select

EN

Set

Q

P1IE.x

P1IFG.x

P1IRQ.x

Interrupt

Flag

P1IES.x

P1SEL.x

Module X IN

P1IN.x

P1OUT.x

Module X OUT

Direction Control

From Module

P1DIR.x

P1SEL.x

Pad Logic

NOTE: x = Bit Identifier, 0 to 3 For Port P1

PnSel.x

PnDIR.x

Dir. Control

from module

PnOUT.x

Module X

OUT

PnIN.x

Module X

IN

PnIE.x

PnIFG.x

PnIES.x

P1Sel.0

P1DIR.0

P1DIR.0

P1OUT.0

VSS

P1IN.0

TACLK†

P1IE.0

P1IFG.0

P1IES.0

P1Sel.1

P1DIR.1

P1DIR.1

P1OUT.1

Out0 signal†

P1IN.1

CCI0A†

P1IE.1

P1IFG.1

P1IES.1

P1Sel.2

P1DIR.2

P1DIR.2

P1OUT.2

Out1 signal†

P1IN.2

CCI1A†

P1IE.2

P1IFG.2

P1IES.2

P1Sel.3

P1DIR.3

P1DIR.3

P1OUT.3

Out2 signal†

P1IN.3

CCI2A†

P1IE.3

P1IFG.3

P1IES.3

† Signal from or to Timer_A

NOTES:

1. Optional selection of pullup or pulldown resistors with ROM (masked) versions.

2. Fuses for optional pullup and pulldown resistors can only be programmed at the factory.

CMOS INPUT (RST/NMI)

VCC

(see Note 1)

(see Note 1)

GND

(see Note 2)

(see Note 2)