SLAS787 datasheet(24/52 Pages) TI2

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DCO Frequency − MHz

0.10

1.00

10.00

0.10

1.00

10.00

RSELx = 0...11

RSELx = 12...15

MSP430G2231-Q1

SLAS787B – NOVEMBER 2011 – REVISED MARCH 2014

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9.15 Calibrated DCO Frequencies – Tolerance

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

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

BCSCTL1= CALBC1_1MHz,

1-MHz tolerance over

0°C to 85°C

DCOCTL = CALDCO_1MHz,

3 V

-3

±0.5

temperature(1)

-40°C to 105°C

calibrated at 30°C and 3 V

BCSCTL1= CALBC1_1MHz,

1-MHz tolerance over VCC

DCOCTL = CALDCO_1MHz,

30°C

1.8 V to 3.6 V

-3

±2

calibrated at 30°C and 3 V

BCSCTL1= CALBC1_1MHz,

-40°C to 85°C

1-MHz tolerance overall

DCOCTL = CALDCO_1MHz,

1.8 V to 3.6 V

-6

±3

-40°C to 105°C

calibrated at 30°C and 3 V

(1)

This is the frequency change from the measured frequency at 30°C over temperature.

9.16 Wakeup From Lower-Power Modes (LPM3, LPM4) – Electrical Characteristics

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

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

UNIT

DCO clock wakeup time from LPM3

BCSCTL1= CALBC1_1MHz,

tDCO,LPM3/4

3 V

1.5

µs

or LPM4(1)

DCOCTL = CALDCO_1MHz

CPU wakeup time from LPM3 or

1/fMCLK +

tCPU,LPM3/4

LPM4(2)

tClock,LPM3/4

(1)

The DCO clock wakeup time is measured from the edge of an external wake-up signal (for example, port interrupt) to the first clock

edge observable externally on a clock pin (MCLK or SMCLK).

(2)

Parameter applicable only if DCOCLK is used for MCLK.

9.17 Typical Characteristics – DCO Clock Wakeup Time From LPM3, LPM4

Figure 14. DCO Wakeup Time From LPM3 vs DCO Frequency

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