Datasheet

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SLAS491A − AUGUST 2005 − REVISED OCTOBER 2005
32
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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
BCSCTL1= CALBC1_8MHz;
DCOCTL = CALDCO_8MHz
2.2 V/3 V 1.5
s
t
DCO,LPM3/4
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
DCO Wake Time − us
Figure 13. Clock wake-up time from LPM3 vs DCO frequency
RSELx = 0...11
RSELx = 12...15