MSP430F14X datasheet(25/83 Pages) TI

25 / 83 page

2.2

DCO_0

Max

Min

Max

Min

DCO_7

DCO

Supply Voltage (V)

MSP430F149, MSP430F148, MSP430F147

MSP430F1491, MSP430F1481, MSP430F1471

MSP430F135, MSP430F133

www.ti.com

SLAS272H – JULY 2000 – REVISED MAY 2018

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Product Folder Links: MSP430F149 MSP430F148 MSP430F147 MSP430F1491 MSP430F1481 MSP430F1471

MSP430F135 MSP430F133

Specifications

DCO Characteristics (see Figure 5-12)

•

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

fDCO(x0) to fDCO(x7) are valid for all devices.

•

All ranges selected by Rsel(n) overlap with Rsel(n+1); for example, Rsel0 overlaps with Rsel1, and

Rsel6 overlaps with Rsel7.

•

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

•

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) × 2

MOD/32 .

Figure 5-12. DCO Characteristics

(1)

ROSC = 100 kΩ, metal film resistor, type 0257, 0.6 W, 1% tolerance, TK = ±50 ppm/°C

5.19 DCO When Using ROSC

over recommended operating supply voltage and free-air temperature (unless otherwise noted)

(1)

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

fDCO

DCO output frequency

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

TA = 25°C

2.2 V

1.8 ±15%

MHz

3 V

1.95 ±15%

Temperature drift

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

2.2 V, 3 V

±0.1

%/°C

Drift with VCC variation

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

2.2 V, 3 V

%/°V

MSP430F14X Datasheet(PDF) 25 Page - Texas Instruments

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