English
Language : 

MSP430FE42X_10 Datasheet, PDF (25/51 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER
◁
MSP430FE42x
MIXED SIGNAL MICROCONTROLLER
SLAS396C − JULY 2003 − REVISED OCTOBER 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
MIN TYP MAX UNIT
3V
1
MHz
3 V 0.3 0.7 1.3 MHz
3 V 2.7 6.1 11.3 MHz
3 V 0.8 1.5 2.5 MHz
3 V 6.5 12.1
20 MHz
3 V 1.3 2.2 3.5 MHz
3 V 10.3 17.9 28.5 MHz
3 V 2.1 3.4 5.2 MHz
3V
16 26.6
41 MHz
3 V 4.2 6.3 9.2 MHz
3V
30
46
70 MHz
1 < TAP ≤ 20 1.06
1.11
TAP = 27 1.07
1.17
3 V –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
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
25
 ▷