DCO Frequency − MHz
0.10
1.00
10.00
0.10
1.00
10.00
DCO W
ake
T
ime
−
µs
RSELx = 0...11
RSELx = 12...15
MSP430G2231-Q1
SLAS787B – NOVEMBER 2011 – REVISED MARCH 2014
www.ti.com
9.15 Calibrated DCO Frequencies – Tolerance
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
T
A
V
CC
MIN
TYP
MAX
UNIT
BCSCTL1= CALBC1_1MHz,
1-MHz tolerance over
0°C to 85°C
DCOCTL = CALDCO_1MHz,
3 V
-3
±0.5
+3
%
temperature
(1)
-40°C to 105°C
calibrated at 30°C and 3 V
BCSCTL1= CALBC1_1MHz,
1-MHz tolerance over V
CC
DCOCTL = CALDCO_1MHz,
30°C
1.8 V to 3.6 V
-3
±2
+3
%
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
+6
%
-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
V
CC
MIN
TYP
MAX
UNIT
DCO clock wakeup time from LPM3
BCSCTL1= CALBC1_1MHz,
t
DCO,LPM3/4
3 V
1.5
µs
or LPM4
(1)
DCOCTL = CALDCO_1MHz
CPU wakeup time from LPM3 or
1/f
MCLK
+
t
CPU,LPM3/4
LPM4
(2)
t
Clock,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
24
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