MSP430F249-EP_14 Datasheet, PDF (40/82 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F249-EP
MIXED SIGNAL MICROCONTROLLER
2008
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
wake-up from lower power modes (LPM3/4)
PARAMETER
TEST CONDITIONS
VCC
MIN TYP MAX UNIT
BCSCTL1= CALBC1_1MHz,
DCOCTL = CALDCO_1MHz
2.2 V/3 V
2
t_DCO,LPM3/4
DCO clock wake−up time from
LPM3/4
(see Note 1)
BCSCTL1= CALBC1_8MHz,
DCOCTL = CALDCO_8MHz
BCSCTL1= CALBC1_12MHz,
DCOCTL = CALDCO_12MHz
2.2 V/3 V
2.2 V/3 V
1.5
μs
1
BCSCTL1= CALBC1_16MHz,
DCOCTL = CALDCO_16MHz
3V
1
t_CPU,LPM3/4
CPU wake−up time from LPM3/4
(see Note 2)
1/f_MCLK +
t_Clock,LPM3/4
NOTES: 1. The DCO clock wake-up time is measured from the edge of an external wake-up signal (e.g., 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.
typical characteristics − DCO clock wake-up time from LPM3/4
10.00
RSELx = 0...11
1.00
RSELx = 12...15
0.10
0.10
1.00
10.00
DCO Frequency − MHz
Figure 18. Clock Wake-Up Time From LPM3 vs DCO Frequency
40
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