Datasheet

DCO Frequency − MHz
0.10
1.00
10.00
0.10 1.00 10.00
DCO Wake Time − us
RSELx = 0...11
RSELx = 12...15
MSP430AFE2x3
MSP430AFE2x2
MSP430AFE2x1
SLAS701A – NOVEMBER 2010– REVISED MARCH 2011 www.ti.com
Calibrated DCO Frequencies – Tolerance
PARAMETER TEST CONDITIONS T
A
V
CC
MIN TYP MAX UNIT
BCSCTL1 = CALBC1_8MHZ,
8-MHz tolerance over
DCOCTL = CALDCO_8MHZ, 0°C to 85°C 3.3 V 7.76 8 8.24 MHz
temperature
(1)
calibrated at 30°C and 3.3V
BCSCTL1 = CALBC1_8MHZ,
8-MHz tolerance over V
CC
DCOCTL = CALDCO_8MHZ, 30°C 2.7 V to 3.6 V 7.76 8 8.24 MHz
calibrated at 30°C and 3.3V
BCSCTL1 = CALBC1_8MHZ,
8-MHz tolerance overall DCOCTL = CALDCO_8MHZ, -40°C to 85°C 2.7 V to 3.6 V 7.52 8 8.48 MHz
calibrated at 30°C and 3.3V
BCSCTL1 = CALBC1_12MHZ,
12-MHz tolerance over
DCOCTL = CALDCO_12MHZ, 0°C to 85°C 3.3 V 11.64 12 12.36 MHz
temperature
(1)
calibrated at 30°C and 3.3V
BCSCTL1 = CALBC1_12MHZ,
12-MHz tolerance over V
CC
DCOCTL = CALDCO_12MHZ, 30°C 3.3 V to 3.6 V 11.64 12 12.36 MHz
calibrated at 30°C and 3.3V
BCSCTL1 = CALBC1_12MHZ,
12-MHz tolerance overall DCOCTL = CALDCO_12MHZ, -40°C to 85°C 3.3 V to 3.6 V 11.28 12 12.72 MHz
calibrated at 30°C and 3.3V
(1) This is the frequency change from the measured frequency at 30°C over temperature.
Wake-Up From Lower-Power Modes (LPM3/4)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
DCO clock wake-up time from f
DCO
= DCO default frequency
t
DCO,LPM3/4
3 V 1.5 µs
LPM3/4
(1)
(approximately 1 MHz)
CPU wake-up time from 1 / f
MCLK
+
t
CPU,LPM3/4
µs
LPM3/4
(2)
t
DCO,LPM3/4
(1) The DCO clock wake-up time is measured from the edge of an external wake-up signal (for example, a 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
Figure 14. Clock Wake-Up Time From LPM3 vs DCO Frequency
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