MSP430F530x, MSP430F5310
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SLAS677B –SEPTEMBER 2010–REVISED MARCH 2011
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
SRSEL = fDCO(DCORSEL+1,DCO)/fDCO(DCORSEL,DCO)
1.2
2.3 ratio
Frequency step between tap
DCO and DCO + 1
SDCO
SDCO = fDCO(DCORSEL,DCO+1)/fDCO(DCORSEL,DCO)
Measured at SMCLK
1.02
40
1.12 ratio
Duty cycle
dfDCO/dT
dfDCO/dVCC
50
0.1
1.9
60
%
DCO frequency temperature drift
fDCO = 1 MHz,
%/°C
%/V
(1)
(2)
DCO frequency voltage drift
fDCO = 1 MHz
(1) Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(-40 to 85°C) / (85°C – (–40°C))
(2) Calculated using the box method: (MAX(1.8 to 3.6 V) – MIN(1.8 to 3.6 V)) / MIN(1.8 to 3.6 V) / (3.6 V – 1.8 V)
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 6. Typical DCO frequency
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