MSP430F673x
MSP430F672x
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SLAS731A –DECEMBER 2011–REVISED APRIL 2012
DCO Frequency
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
DCORSELx = 0, DCOx = 0, MODx = 0
DCORSELx = 0, DCOx = 31, MODx = 0
DCORSELx = 1, DCOx = 0, MODx = 0
DCORSELx = 1, DCOx = 31, MODx = 0
DCORSELx = 2, DCOx = 0, MODx = 0
DCORSELx = 2, DCOx = 31, MODx = 0
DCORSELx = 3, DCOx = 0, MODx = 0
DCORSELx = 3, DCOx = 31, MODx = 0
DCORSELx = 4, DCOx = 0, MODx = 0
DCORSELx = 4, DCOx = 31, MODx = 0
DCORSELx = 5, DCOx = 0, MODx = 0
DCORSELx = 5, DCOx = 31, MODx = 0
DCORSELx = 6, DCOx = 0, MODx = 0
DCORSELx = 6, DCOx = 31, MODx = 0
DCORSELx = 7, DCOx = 0, MODx = 0
DCORSELx = 7, DCOx = 31, MODx = 0
MIN
0.07
0.70
0.15
1.47
0.32
3.17
0.64
6.07
1.3
TYP
MAX UNIT
0.20 MHz
1.70 MHz
0.36 MHz
3.45 MHz
0.75 MHz
7.38 MHz
1.51 MHz
14.0 MHz
3.2 MHz
fDCO(0,0)
fDCO(0,31)
fDCO(1,0)
fDCO(1,31)
fDCO(2,0)
fDCO(2,31)
fDCO(3,0)
fDCO(3,31)
fDCO(4,0)
fDCO(4,31)
fDCO(5,0)
fDCO(5,31)
fDCO(6,0)
fDCO(6,31)
fDCO(7,0)
fDCO(7,31)
DCO frequency (0, 0)
DCO frequency (0, 31)
DCO frequency (1, 0)
DCO frequency (1, 31)
DCO frequency (2, 0)
DCO frequency (2, 31)
DCO frequency (3, 0)
DCO frequency (3, 31)
DCO frequency (4, 0)
DCO frequency (4, 31)
DCO frequency (5, 0)
DCO frequency (5, 31)
DCO frequency (6, 0)
DCO frequency (6, 31)
DCO frequency (7, 0)
DCO frequency (7, 31)
12.3
2.5
28.2 MHz
6.0 MHz
23.7
4.6
54.1 MHz
10.7 MHz
88.0 MHz
19.6 MHz
135 MHz
39.0
8.5
60
Frequency step between range
DCORSEL and DCORSEL + 1
SDCORSEL
SDCO
SRSEL = fDCO(DCORSEL+1,DCO)/fDCO(DCORSEL,DCO)
1.2
2.3 ratio
Frequency step between tap
DCO and DCO + 1
SDCO = fDCO(DCORSEL,DCO+1)/fDCO(DCORSEL,DCO)
1.02
40
1.12 ratio
Duty cycle
dfDCO/dT
Measured at SMCLK
DCO frequency temperature drift fDCO = 1 MHz
50
0.1
1.9
60
%
%/°C
%/V
dfDCO/dVCORE
DCO frequency voltage drift
fDCO = 1 MHz
Typical DCO Frequency, VCC = 3.0 V,TA = 25°C
100
10
DCOx = 31
1
DCOx = 0
0.1
0
1
2
3
4
5
6
7
DCORSEL
Figure 10. Typical DCO Frequency
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