Datasheet

MSP430x41x
MIXED SIGNAL MICROCONTROLLER
SLAS340J − MAY 2001 − REVISED DECEMBER 2008
34
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
DCO
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
f
(DCOCLK)
N
(DCO)
= 01Eh, FN_8 = FN_4 = FN_3 = FN_2 = 0, D = 2,
DCOPLUS = 0, f
Crystal
= 32.768 kHz
2.2 V/3 V 1 MHz
f
FN 8 FN 4 FN 3 FN 2 0 DCOPLUS 1
2.2 V 0.3 0.65 1.25
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
FN 8 FN 4 FN 3 FN 2 0 DCOPLUS 1
2.2 V 2.5 5.6 10.5
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
FN 8 FN 4 FN 3 0 FN 2 1 DCOPLUS 1
2.2 V 0.7 1.3 2.3
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
FN 8 FN 4 FN 3 0 FN 2 1 DCOPLUS 1
2.2 V 5.7 10.8 18
MHz
f
(DCO=27)
FN_8 = FN_4 = FN_3 = 0, FN_2 = 1, DCOPLUS = 1
3 V 6.5 12.1 20
MHz
f
FN 8 FN 4 0 FN 3 1 FN 2 x DCOPLUS 1
2.2 V 1.2 2 3
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
FN 8 FN 4 0 FN 3 1 FN 2 x; DCOPLUS 1
2.2 V 9 15.5 25
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
FN 8 0 FN 4 1 FN 3 FN 2 x DCOPLUS 1
2.2 V 1.8 2.8 4.2
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
FN 8 0 FN 4 1 FN 3 FN 2 x DCOPLUS 1
2.2 V 13.5 21.5 33
MHz
f
(DCO=27)
FN_8 = 0, FN_4 = 1, FN_3 = FN_2 =x, DCOPLUS = 1
3 V 16 26.6 41
MHz
f
FN 8 1 FN 4 FN 3 FN 2 x DCOPLUS 1
2.2 V 2.8 4.2 6.2
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
FN 8 1 FN 4 FN 3 FN 2 x DCOPLUS 1
2.2 V 21 32 46
MHz
f
(DCO=27)
FN_8 = 1,FN_4 = FN_3 = FN_2 = x, DCOPLUS = 1
3 V 30 46 70
MHz
S
Step size between adjacent DCO taps:
S f /f
1 < TAP ≤ 20 1.06 1.11
S
n
S
n
= f
DCO(Tap n+1)
/ f
DCO(Tap n)
(see Figure 20 for taps 21 to 27)
TAP = 27 1.07 1.17
D
Temperature drift, N
(
D
CO)
= 01Eh, FN_8 = FN_4 = FN_3 = FN_2 = 0,
2.2 V –0.2 –0.3 –0.4
%/_C
D
t
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
D
V
Drift with V
CC
variation, N
(DCO)
= 01Eh,
FN_8 = FN_4 = FN_3 = FN_2 = 0, D = 2, DCOPLUS = 0
0 5 15 %/V
T
A
− °CV
CC
− V
f
(DCO)
f
(DCO20
5
C)
f
(DCO)
f
(DCO3V)
1.8 3.02.4 3.6
1.0
20 6040 85
1.0
0−20−400
Figure 19. DCO Frequency vs Supply Voltage V
CC
and vs Ambient Temperature