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MSP430FE42X2 Datasheet, PDF (26/48 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER
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MSP430FE42x2
MIXED SIGNAL MICROCONTROLLER
SLAS616 − JULY 2008
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
DCO
PARAMETER
TEST CONDITIONS
f(DCOCLK)
f(DCO=2)
f(DCO=27)
f(DCO=2)
f(DCO=27)
f(DCO=2)
f(DCO=27)
f(DCO=2)
f(DCO=27)
f(DCO=2)
f(DCO=27)
N(DCO) = 01Eh, FN_8 = FN_4 = FN_3 = FN_2 = 0, D = 2,
DCOPLUS= 0, fCrystal = 32.768 kHz
FN_8 = FN_4 = FN_3 = FN_2 = 0, DCOPLUS = 1
FN_8 = FN_4 = FN_3 = FN_2 = 0, DCOPLUS = 1
FN_8 = FN_4 = FN_3 = 0, FN_2 = 1, DCOPLUS = 1
FN_8 = FN_4 = FN_3 = 0, FN_2 = 1, DCOPLUS = 1
FN_8 = FN_4 = 0, FN_3 = 1, FN_2 = x, DCOPLUS = 1
FN_8 = FN_4 = 0, FN_3 = 1, FN_2 = x, DCOPLUS = 1
FN_8 = 0, FN_4 = 1, FN_3 = FN_2 = x, DCOPLUS = 1
FN_8 = 0, FN_4 = 1, FN_3 = FN_2 = x, DCOPLUS = 1
FN_8 = 1, FN_4 = FN_3 = FN_2 = x, DCOPLUS = 1
FN_8 = 1,FN_4 = FN_3 = FN_2 = x, DCOPLUS = 1
Step size between adjacent DCO taps:
Sn
Sn = fDCO(Tap n+1) / fDCO(Tap n), (see Figure 12 for taps 21 to 27)
Dt
Temperature drift, N(DCO) = 01Eh, FN_8 = FN_4 = FN_3 = FN_2 = 0,
D = 2, DCOPLUS = 0
DV
Drift with VCC variation, N(DCO) = 01Eh,
FN_8 = FN_4 = FN_3 = FN_2 = 0, D = 2, DCOPLUS = 0
VCC
3V
3V
3V
3V
3V
3V
3V
3V
3V
3V
3V
1 < TAP ≤ 20
TAP = 27
3V
MIN TYP MAX UNIT
1
MHz
0.3 0.7 1.3 MHz
2.7 6.1 11.3 MHz
0.8 1.5 2.5 MHz
6.5 12.1
20 MHz
1.3 2.2 3.5 MHz
10.3 17.9 28.5 MHz
2.1 3.4 5.2 MHz
16 26.6
41 MHz
4.2 6.3 9.2 MHz
30
46
70 MHz
1.06
1.11
1.07
1.17
–0.2 –0.3 –0.4 %/_C
0
5
15 %/V
f(DCO)
f(DCO3V)
f(DCO)
f(DCO205C)
1.0
1.0
0 1.8
2.4
3.0
3.6
VCC − V
−40 −20
0
20
40
60
Figure 11. DCO Frequency vs Supply Voltage VCC and vs Ambient Temperature
85
TA − °C
26
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