MSP430F42x
MIXED SIGNAL MICROCONTROLLER
SLAS421A − APRIL 2004 − REVISED JUNE 2007
25
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
3 V
1
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
(DCO=27)
FN_8=FN_4=FN_3=FN_2=0; DCOPLUS = 1
3 V
2.7
6.1
11.3
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
(DCO=27)
FN_8=FN_4=FN_3=0, FN_2=1; DCOPLUS = 1
3 V
6.5
12.1
20
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
(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
(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
(DCO=27)
FN_8=0, FN_4=1, FN_3= FN_2=x; DCOPLUS = 1
3 V
16
26.6
41
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
(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:
1 < TAP
≤
20
1.06
1.11
S
n
Step size between adjacent DCO taps:
S
n
= f
DCO(Tap n+1)
/ f
DCO(Tap n)
, (see Figure 12 for taps 21 to 27)
TAP = 27
1.07
1.17
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
−
°
C
V
CC
− V
f
(DCO)
f
(DCO20
5
C)
f
(DCO)
f
(DCO3V)
1.8
3.0
2.4
3.6
1.0
20
60
40
85
1.0
0
−20
−40
0
Figure 11. DCO Frequency vs Supply Voltage V
CC
and vs Ambient Temperature
