SLAS616 datasheet(26/52 Pages) TI2

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MSP430FE42x2

MIXED SIGNAL MICROCONTROLLER

SLAS616 − JULY 2008

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature (unless otherwise

noted) (continued)

DCO

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

f(DCOCLK)

N(DCO) = 01Eh, FN_8 = FN_4 = FN_3 = FN_2 = 0, D = 2,

DCOPLUS= 0, fCrystal = 32.768 kHz

3 V

MHz

f(DCO=2)

FN_8 = FN_4 = FN_3 = FN_2 = 0, DCOPLUS = 1

3 V

0.3

0.7

1.3

MHz

f(DCO=27)

FN_8 = FN_4 = FN_3 = FN_2 = 0, DCOPLUS = 1

3 V

2.7

6.1

11.3

MHz

f(DCO=2)

FN_8 = FN_4 = FN_3 = 0, FN_2 = 1, DCOPLUS = 1

3 V

0.8

1.5

2.5

MHz

f(DCO=27)

FN_8 = FN_4 = FN_3 = 0, FN_2 = 1, DCOPLUS = 1

3 V

6.5

12.1

MHz

f(DCO=2)

FN_8 = FN_4 = 0, FN_3 = 1, FN_2 = x, DCOPLUS = 1

3 V

1.3

2.2

3.5

MHz

f(DCO=27)

FN_8 = FN_4 = 0, FN_3 = 1, FN_2 = x, DCOPLUS = 1

3 V

10.3

17.9

28.5

MHz

f(DCO=2)

FN_8 = 0, FN_4 = 1, FN_3 = FN_2 = x, DCOPLUS = 1

3 V

2.1

3.4

5.2

MHz

f(DCO=27)

FN_8 = 0, FN_4 = 1, FN_3 = FN_2 = x, DCOPLUS = 1

3 V

26.6

MHz

f(DCO=2)

FN_8 = 1, FN_4 = FN_3 = FN_2 = x, DCOPLUS = 1

3 V

4.2

6.3

9.2

MHz

f(DCO=27)

FN_8 = 1,FN_4 = FN_3 = FN_2 = x, DCOPLUS = 1

3 V

MHz

Step size between adjacent DCO taps:

1 < TAP

≤ 20

1.06

1.11

Step size between adjacent DCO taps:

Sn = fDCO(Tap n+1) / fDCO(Tap n), (see Figure 12 for taps 21 to 27)

TAP = 27

1.07

1.17

Temperature drift, N(DCO) = 01Eh, FN_8 = FN_4 = FN_3 = FN_2 = 0,

D = 2, DCOPLUS = 0

3 V

–0.2

–0.3

–0.4

/_C

Drift with VCC variation, N(DCO) = 01Eh,

FN_8 = FN_4 = FN_3 = FN_2 = 0, D = 2, DCOPLUS = 0

%/V

TA − °C

VCC − V

(DCO)

(DCO20

5C)

(DCO)

(DCO3V)

1.8

3.0

2.4

3.6

1.0

−20

−40

Figure 11. DCO Frequency vs Supply Voltage VCC and vs Ambient Temperature

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