MSP430F149 datasheet(33/59 Pages) TI

33 / 59 page

MSP430x13x, MSP430x14x, MSP430x14x1

MIXED SIGNAL MICROCONTROLLER

SLAS272F − JULY 2000 − REVISED JUNE 2004

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics over recommended 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

fDCOx0 to fDCOx7 are valid for all devices.

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

Rsel7.

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

D Modulation control bits MOD0 to MOD4 select how often fDCO+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

f(DCO)

× (2MOD/32 ).

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 oscillator (see Note 1)

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

CXIN

Integrated input capacitance

XTS=0; LF oscillator selected

VCC = 2.2 V/3 V

CXIN

Integrated input capacitance

XTS=1; XT1 oscillator selected

VCC = 2.2 V/3 V

CXOUT

Integrated output capacitance

XTS=0; LF oscillator selected

VCC = 2.2 V/3 V

CXOUT

Integrated output capacitance

XTS=1; XT1 oscillator selected

VCC = 2.2 V/3 V

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. 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.

crystal oscillator, XT2 oscillator (see Note 1)

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

CXT2IN

Input capacitance

VCC = 2.2 V/3 V

CXT2OUT

Output capacitance

VCC = 2.2 V/3 V

VIL

Input levels at XT2IN

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

VSS

0.2

× VCC

VIH

Input levels at XT2IN

VCC = 2.2 V/3 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.

USART0, USART1 (see Note 1)

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

t( )

USART0/1: deglitch time

VCC = 2.2 V

200

430

800

t(τ)

USART0/1: deglitch time

VCC = 3 V

150

280

500

NOTE 1: The signal applied to the USART0/1 receive signal/terminal (URXD0/1) should meet the timing requirements of t(τ) to ensure that the

URXS flip-flop is set. The URXS flip-flop is set with negative pulses meeting the minimum-timing condition of t(τ). The operating

conditions to set the flag must be met independently from this timing constraint. The deglitch circuitry is active only on negative

transitions on the URXD0/1 line.

MSP430F149 Datasheet(PDF) 33 Page - Texas Instruments

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