MSP430F5310 Datasheet, PDF (52/106 Pages) Texas Instruments – MSP430F5310 and MSP430F530x Mixed-Signal Microcontrollers

MSP430F5310, MSP430F5309
MSP430F5308, MSP430F5304
SLAS677E – SEPTEMBER 2010 – REVISED NOVEMBER 2013
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DCO Frequency
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
f_DCO(0,0)
f_DCO(0,31)
f_DCO(1,0)
f_DCO(1,31)
f_DCO(2,0)
f_DCO(2,31)
f_DCO(3,0)
f_DCO(3,31)
f_DCO(4,0)
f_DCO(4,31)
f_DCO(5,0)
f_DCO(5,31)
f_DCO(6,0)
f_DCO(6,31)
f_DCO(7,0)
f_DCO(7,31)
S_DCORSEL
PARAMETER
DCO frequency (0, 0)⁽¹⁾
DCO frequency (0, 31)⁽¹⁾
DCO frequency (1, 0)⁽¹⁾
DCO frequency (1, 31)⁽¹⁾
DCO frequency (2, 0)⁽¹⁾
DCO frequency (2, 31)⁽¹⁾
DCO frequency (3, 0)⁽¹⁾
DCO frequency (3, 31)⁽¹⁾
DCO frequency (4, 0)⁽¹⁾
DCO frequency (4, 31)⁽¹⁾
DCO frequency (5, 0)⁽¹⁾
DCO frequency (5, 31)⁽¹⁾
DCO frequency (6, 0)⁽¹⁾
DCO frequency (6, 31)⁽¹⁾
DCO frequency (7, 0)⁽¹⁾
DCO frequency (7, 31)⁽¹⁾
Frequency step between range
DCORSEL and DCORSEL + 1
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
S_RSEL = f_{DCO(DCORSEL+1,DCO)}/f_{DCO(DCORSEL,DCO)}
MIN TYP MAX UNIT
0.07
0.20 MHz
0.70
1.70 MHz
0.15
0.36 MHz
1.47
3.45 MHz
0.32
0.75 MHz
3.17
7.38 MHz
0.64
1.51 MHz
6.07
14.0 MHz
1.3
3.2 MHz
12.3
28.2 MHz
2.5
6.0 MHz
23.7
54.1 MHz
4.6
10.7 MHz
39.0
88.0 MHz
8.5
19.6 MHz
60
135 MHz
1.2
2.3 ratio
S_DCO
Frequency step between tap
DCO and DCO + 1
S_DCO = f_{DCO(DCORSEL,DCO+1)}/f_{DCO(DCORSEL,DCO)}
1.02
1.12 ratio
Duty cycle
Measured at SMCLK
40
50
60 %
df_DCO/dT
df_DCO/dV_CC
DCO frequency temperature
drift ⁽²⁾
DCO frequency voltage drift⁽³⁾
f_DCO = 1 MHz,
f_DCO = 1 MHz
0.1
%/°C
1.9
%/V
(1) When selecting the proper DCO frequency range (DCORSELx), the target DCO frequency, f_DCO, should be set to reside within the
range of f_{DCO(n, 0),MAX} ≤ f_DCO ≤ f_{DCO(n, 31),MIN}, where f_{DCO(n, 0),MAX} represents the maximum frequency specified for the DCO frequency,
range n, tap 0 (DCOx = 0) and f_{DCO(n,31),MIN} represents the minimum frequency specified for the DCO frequency, range n, tap 31
(DCOx = 31). This ensures that the target DCO frequency resides within the range selected. It should also be noted that if the actual
f_DCO frequency for the selected range causes the FLL or the application to select tap 0 or 31, the DCO fault flag is set to report that the
selected range is at its minimum or maximum tap setting.
(2) Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(-40 to 85°C) / (85°C – (–40°C))
(3) 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, V_CC = 3.0 V, T_A = 25°C
100
10
DCOx = 31
1
DCOx = 0
0.1
0
1
2
3
4
5
6
7
DCORSEL
Figure 7. Typical DCO frequency
52
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