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MSP430FG439 Datasheet, PDF (24/88 Pages) Texas Instruments – Mixed-Signal Microcontrollers
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MSP430FG439, MSP430FG438, MSP430FG437
SLAS380D – APRIL 2004 – REVISED NOVEMBER 2014
5.18 DCO
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
f(DCOCLK)
TEST CONDITIONS
N(DCO) = 01Eh, FN_8 = FN_4 = FN_3 = FN_2 = 0, D = 2,
DCOPLUS = 0, fCrystal = 32.738 kHz
f(DCO=2)
FN_8=FN_4 = FN_3 = FN_2 = 0, DCOPLUS = 1
VCC
2.2 V, 3 V
2.2 V
3V
f(DCO=27)
FN_8 = FN_4 = FN_3 = FN_2 = 0, DCOPLUS = 1
2.2 V
3V
f(DCO=2)
FN_8 = FN_4 = FN_3 = FN_2 = 1, DCOPLUS = 1
2.2 V
3V
f(DCO=27)
FN_8 = FN_4 = FN_3 = FN_2 = 1, DCOPLUS = 1
2.2 V
3V
f(DCO=2)
FN_8 = FN_4 = 0, FN_3 = 1, FN_2 = x, DCOPLUS = 1
2.2 V
3V
f(DCO=27)
FN_8 = FN_4 = 0, FN_3 = 1, FN_2 = x, DCOPLUS = 1
2.2 V
3V
f(DCO=2)
FN_8 = 0, FN_4 = 1, FN_3 = FN_2 = x, DCOPLUS = 1
2.2 V
3V
f(DCO=27)
FN_8 = 0, FN_4 = 1, FN_3 = FN_2 = x, DCOPLUS = 1
2.2 V
3V
f(DCO=2)
FN_8 = 1, FN_4 = FN_3 = FN_2 = x, DCOPLUS = 1
2.2 V
3V
f(DCO=27)
FN_8 = 1, FN_4 = FN_3 = FN_2 = x, DCOPLUS = 1
2.2 V
3V
Step size between adjacent DCO taps:
1 < TAP ≤ 20
Sn
Sn = fDCO(Tap n+1) / fDCO(Tap n) (see Figure 5-16 for taps 21 to
27)
TAP = 27
Dt
Temperature drift, N(DCO) = 01Eh,
FN_8 = FN_4 = FN_3 = FN_2 = 0, D = 2, DCOPLUS = 0
2.2 V
3V
DV
Drift with VCC variation, N(DCO) = 01Eh,
FN_8 = FN_4 = FN_3 = FN_2 = 0, D = 2, DCOPLUS = 0
2.2 V, 3 V
f(DCO)
f(DCO3V)
f(DCO)
f(DCO20°C)
1.0
1.0
MIN
0.3
0.3
2.5
2.7
0.7
0.8
5.7
6.5
1.2
1.3
9
10.3
1.8
2.1
13.5
16
2.8
4.2
21
30
1.06
1.07
–0.2
–0.2
0
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TYP
MAX UNIT
1
MHz
0.65
1.25
MHz
0.7
1.3
5.6
10.5
MHz
6.1
11.3
1.3
2.3
MHz
1.5
2.5
10.8
18
MHz
12.1
20
2
3
MHz
2.2
3.5
15.5
25
MHz
17.9
28.5
2.8
4.2
MHz
3.4
5.2
21.5
33
MHz
26.6
41
4.2
6.2
MHz
6.3
9.2
32
46
MHz
46
70
1.11
1.17
–0.3
–0.4
%/°C
–0.3
–0.4
5
15 %/V
0 1.8
2.4
3.0
3.6
VCC - V
-40
-20
0
20
40
60
Figure 5-15. DCO Frequency vs Supply Voltage VCC and vs Ambient Temperature
85
TA - °C
24
Specifications
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