MSP430 datasheet(19/31 Pages) TI

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MSP430x11x

MIXED SIGNAL MICROCONTROLLERS

SLAS196D− DECEMBER 1998 − REVISED SEPTEMBER 2004

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics over recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted) (continued)

main DCO characteristics

D Individual devices have a minimum and maximum operation frequency. The specified parameters for

f(DCOx0) to f(DCOx7) are valid for all devices.

D All ranges selected by Rsel(n) overlap with Rsel(n+1): Rsel0 overlaps Rsel1, ... Rsel6 overlaps Rsel7.

D DCO control bits DCO0, DCO1, and DCO2 have a step size as defined by parameter S

DCO.

D Modulation control bits MOD0 to MOD4 select how often f(

DCO+1) is used within the period of 32 DCOCLK

cycles. The frequency f(DCO) is used for the remaining cycles. The frequency is an average equal to:

faverage +

f(DCO)

f(DCO)1)

MOD

f(DCO))(32*MOD)

f(DCO)1)

crystal oscillator, XIN, XOUT

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

CXIN

Capacitance at input

VCC = 3 V/5 V

CXOUT

Capacitance at output

VCC = 3 V/5 V

VIL

Input levels at XIN

VCC = 3 V/5 V (see Note 2)

VSS

0.2

×VCC

VIH

Input levels at XIN

VCC = 3 V/5 V (see Note 2)

0.8

×VCC

VCC

NOTES:

1. The oscillator needs capacitors at both terminals, with values specified by the crystal manufacturer.

2. Applies only when using an external logic-level clock source. Not applicable when using a crystal or resonator.

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