MSP430F5259 datasheet(57/107 Pages) TI1

57 / 107 page

MSP430F5259, MSP430F5258, MSP430F5257, MSP430F5256

MSP430F5255, MSP430F5254, MSP430F5253, MSP430F5252

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SLAS903A – MAY 2013 – REVISED JULY 2013

Crystal Oscillator, XT2 (continued)

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

(1) (2)

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

fOSC = 6 MHz,

XT2BYPASS = 0, XT2DRIVEx = 0,

0.5

TA = 25°C, CL,eff = 15 pF

tSTART,HF

Startup time

3.0 V

fOSC = 20 MHz,

XT2BYPASS = 0, XT2DRIVEx = 2,

0.3

TA = 25°C, CL,eff = 15 pF

Integrated effective load

CL,eff

capacitance, HF mode(6) (1)

Duty cycle

Measured at ACLK, fXT2,HF2 = 20 MHz

XT2BYPASS = 1(8),

fFault,HF

Oscillator fault frequency(7)

300

kHz

XT2BYPASSLV = 0 or 1

(6)

Includes parasitic bond and package capacitance (approximately 2 pF per pin).

Because the PCB adds additional capacitance, it is recommended to verify the correct load by measuring the ACLK frequency. For a

correct setup, the effective load capacitance should always match the specification of the used crystal.

(7)

Frequencies below the MIN specification set the fault flag. Frequencies above the MAX specification do not set the fault flag.

Frequencies in between might set the flag.

(8)

Measured with logic-level input frequency but also applies to operation with crystals. Typically, an effective load capacitance of up to 18

pF can be supported.

Internal Very-Low-Power Low-Frequency Oscillator (VLO)

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

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

fVLO

VLO frequency

Measured at ACLK

1.8 V to 3.6 V

9.4

kHz

dfVLO/dT

VLO frequency temperature drift

Measured at ACLK(1)

1.8 V to 3.6 V

0.5

%/°C

dfVLO/dVCC VLO frequency supply voltage drift

Measured at ACLK(2)

1.8 V to 3.6 V

%/V

Duty cycle

Measured at ACLK

1.8 V to 3.6 V

(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)

Internal Reference, Low-Frequency Oscillator (REFO)

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

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

IREFO

REFO oscillator current consumption TA = 25°C

1.8 V to 3.6 V

µA

REFO frequency calibrated

Measured at ACLK

1.8 V to 3.6 V

32768

fREFO

Full temperature range

1.8 V to 3.6 V

-3.5

3.5

REFO absolute tolerance calibrated

TA = 25°C

3 V

-1.5

1.5

dfREFO/dT

REFO frequency temperature drift

Measured at ACLK(1)

1.8 V to 3.6 V

0.01

%/°C

dfREFO/dVCC

REFO frequency supply voltage drift

Measured at ACLK(2)

1.8 V to 3.6 V

1.0

%/V

Duty cycle

Measured at ACLK

1.8 V to 3.6 V

tSTART

REFO startup time

40%/60% duty cycle

1.8 V to 3.6 V

µs

(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)

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MSP430F5259 Datasheet(PDF) 57 Page - Texas Instruments

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