MSP430F5259IRGCT datasheet(29/112 Pages) TI1

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Typical DCO Frequency, V

= 3.0 V, T = 25°C

DCORSEL

100

0.1

DCOx = 31

DCOx = 0

MSP430F5259, MSP430F5258, MSP430F5257, MSP430F5256

MSP430F5255, MSP430F5254, MSP430F5253, MSP430F5252

www.ti.com

SLAS903B – MAY 2013 – REVISED NOVEMBER 2015

5.25 DCO Frequency

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

fDCO(0,0)

DCO frequency (0, 0)(1)

DCORSELx = 0, DCOx = 0, MODx = 0

0.07

0.20

MHz

fDCO(0,31)

DCO frequency (0, 31)(1)

DCORSELx = 0, DCOx = 31, MODx = 0

0.70

1.70

MHz

fDCO(1,0)

DCO frequency (1, 0)(1)

DCORSELx = 1, DCOx = 0, MODx = 0

0.15

0.36

MHz

fDCO(1,31)

DCO frequency (1, 31)(1)

DCORSELx = 1, DCOx = 31, MODx = 0

1.47

3.45

MHz

fDCO(2,0)

DCO frequency (2, 0)(1)

DCORSELx = 2, DCOx = 0, MODx = 0

0.32

0.75

MHz

fDCO(2,31)

DCO frequency (2, 31)(1)

DCORSELx = 2, DCOx = 31, MODx = 0

3.17

7.38

MHz

fDCO(3,0)

DCO frequency (3, 0)(1)

DCORSELx = 3, DCOx = 0, MODx = 0

0.64

1.51

MHz

fDCO(3,31)

DCO frequency (3, 31)(1)

DCORSELx = 3, DCOx = 31, MODx = 0

6.07

14.0

MHz

fDCO(4,0)

DCO frequency (4, 0)(1)

DCORSELx = 4, DCOx = 0, MODx = 0

1.3

3.2

MHz

fDCO(4,31)

DCO frequency (4, 31)(1)

DCORSELx = 4, DCOx = 31, MODx = 0

12.3

28.2

MHz

fDCO(5,0)

DCO frequency (5, 0)(1)

DCORSELx = 5, DCOx = 0, MODx = 0

2.5

6.0

MHz

fDCO(5,31)

DCO frequency (5, 31)(1)

DCORSELx = 5, DCOx = 31, MODx = 0

23.7

54.1

MHz

fDCO(6,0)

DCO frequency (6, 0)(1)

DCORSELx = 6, DCOx = 0, MODx = 0

4.6

10.7

MHz

fDCO(6,31)

DCO frequency (6, 31)(1)

DCORSELx = 6, DCOx = 31, MODx = 0

39.0

88.0

MHz

fDCO(7,0)

DCO frequency (7, 0)(1)

DCORSELx = 7, DCOx = 0, MODx = 0

8.5

19.6

MHz

fDCO(7,31)

DCO frequency (7, 31)(1)

DCORSELx = 7, DCOx = 31, MODx = 0

135

MHz

Frequency step between range

SDCORSEL

SRSEL = fDCO(DCORSEL+1,DCO)/fDCO(DCORSEL,DCO)

1.2

2.3

ratio

DCORSEL and DCORSEL + 1

Frequency step between tap

SDCO

SDCO = fDCO(DCORSEL,DCO+1)/fDCO(DCORSEL,DCO)

1.02

1.12

ratio

DCO and DCO + 1

Duty cycle

Measured at SMCLK

40%

50%

60%

DCO frequency temperature

dfDCO/dT

fDCO = 1 MHz

0.1

%/°C

drift(2)

dfDCO/dVCC

DCO frequency voltage drift(3)

fDCO = 1 MHz

1.9

%/V

(1)

When selecting the proper DCO frequency range (DCORSELx), the target DCO frequency, fDCO, should be set to reside within the

range of fDCO(n, 0),MAX ≤ fDCO ≤ fDCO(n, 31),MIN, where fDCO(n, 0),MAX represents the maximum frequency specified for the DCO frequency,

range n, tap 0 (DCOx = 0) and fDCO(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

fDCO 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°C to 85°C) – MIN(–40°C to 85°C)) / MIN(–40°C to 85°C) / (85°C – (–40°C))

(3)

Calculated using the box method: (MAX(1.8 V to 3.6 V) – MIN(1.8 V to 3.6 V)) / MIN(1.8 V to 3.6 V) / (3.6 V – 1.8 V)

Figure 5-12. Typical DCO frequency

Specifications

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