LVC125A datasheet(24/46 Pages) TI

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MSP430C11x1, MSP430F11x1A

MIXED SIGNAL MICROCONTROLLER

SLAS241H − SEPTEMBER 1999 − 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)

DCO when using ROSC (see Note 1)

PARAMETER

TEST CONDITIONS

VCC

MIN

NOM

MAX

UNIT

fDCO, DCO output frequency

Rsel = 4, DCO = 3, MOD = 0, DCOR = 1,

2.2 V

1.8

±15%

MHz

fDCO, DCO output frequency

Rsel = 4, DCO = 3, MOD = 0, DCOR = 1,

TA = 25°C

3 V

1.95

±15%

MHz

Dt, Temperature drift

Rsel = 4, DCO = 3, MOD = 0, DCOR = 1

2.2 V/3 V

±0.1

°C

Dv, Drift with VCC variation

Rsel = 4, DCO = 3, MOD = 0, DCOR = 1

2.2 V/3 V

%/V

NOTES:

1. ROSC = 100kΩ. Metal film resistor, type 0257. 0.6 watt with 1% tolerance and TK = ±50ppm/°C.

crystal oscillator, LFXT1

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

CXIN

Input capacitance

XTS=0; LF mode selected.

VCC = 2.2 V / 3 V

CXIN

Input capacitance

XTS=1; XT1 mode selected.

VCC = 2.2 V / 3 V (see Note 1)

CXOUT

Output capacitance

XTS=0; LF mode selected.

VCC = 2.2 V / 3 V

CXOUT

Output capacitance

XTS=1; XT1 mode selected.

VCC = 2.2 V / 3 V (see Note 1)

VIL

Input levels at XIN

VCC = 2.2 V/3 V (see Note 2)

VSS

0.2

×VCC

VIH

Input levels at XIN

VCC = 2.2 V/3 V (see Note 2)

0.8

×VCC

VCC

NOTES:

1. Requires external capacitors at both terminals. Values are specified by crystal manufacturers.

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

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