MSP430F423AIPM datasheet(25/45 Pages) TI

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MSP430F42xA

MIXED SIGNAL MICROCONTROLLER

SLAS587 -- FEBRUARY 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

MHz

f(DCO = 2)

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

0.3

0.7

1.3

MHz

f(DCO = 27)

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

2.7

6.1

11.3

MHz

f(DCO = 2)

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

0.8

1.5

2.5

MHz

f(DCO = 27)

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

6.5

12.1

MHz

f(DCO = 2)

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

1.3

2.2

3.5

MHz

f(DCO = 27)

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

10.3

17.9

28.5

MHz

f(DCO = 2)

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

2.1

3.4

5.2

MHz

f(DCO = 27)

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

26.6

MHz

f(DCO = 2)

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

4.2

6.3

9.2

MHz

f(DCO = 27)

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

MHz

Step size between adjacent DCO taps:

/ f

1<TAP ≤ 20

1.06

1.11

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

–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

f(DCO)

f(DCO20°C)

f(DCO)

f(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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