Datasheet

MSP430x22x2, MSP430x22x4
MIXED SIGNAL MICROCONTROLLER
SLAS504B − JULY 2006 − REVISED JULY 2007
36
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
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 clock wake-up time from LPM3/4
BCSCTL1= CALBC1_8MHZ,
DCOCTL = CALDCO_8MHZ
2.2 V/3 V 1.5
s
t
DCO,LPM3/4
DCO
clock
wake up
time
from
LPM3/4
(see Note 1)
BCSCTL1= CALBC1_12MHZ,
DCOCTL = CALDCO_12MHZ
2.2 V/3 V 1
μs
BCSCTL1= CALBC1_16MHZ,
DCOCTL = CALDCO_16MHZ
3 V 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
DCO Frequency − MHz
0.10
1.00
10.00
0.10 1.00 10.00
Figure 13. Clock Wake-Up Time From LPM3 vs DCO Frequency
RSELx = 0...11
RSELx = 12...15
DCO Wake-Up Time − ms