MSP430F673x
MSP430F672x
SLAS731A –DECEMBER 2011–REVISED APRIL 2012
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MAX UNIT
Crystal Oscillator, XT1, Low-Frequency Mode(1) (continued)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
XTS = 0, Measured at ACLK,
fXT1,LF = 32768 Hz
Duty cycle LF mode
30
70
%
Oscillator fault frequency,
LF mode(7)
fFault,LF
XTS = 0(8)
10
10000
Hz
fOSC = 32768 Hz, XTS = 0, XT1BYPASS = 0,
XT1DRIVEx = 0, TA = 25°C, CL,eff = 6 pF
1000
500
tSTART,LF
Startup time, LF mode
3.0 V
ms
fOSC = 32768 Hz, XTS = 0, XT1BYPASS = 0,
XT1DRIVEx = 3, TA = 25°C, CL,eff = 12 pF
(7) Frequencies below the MIN specification set the fault flag. Frequencies above the MAX specification do not set the fault flag.
Frequencies in between might set the flag.
(8) Measured with logic-level input frequency but also applies to operation with crystals.
Internal Very-Low-Power Low-Frequency Oscillator (VLO)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
VLO frequency
VLO frequency temperature drift
TEST CONDITIONS
VCC
MIN
TYP
9.4
0.5
4
MAX UNIT
15 kHz
%/°C
fVLO
Measured at ACLK
1.8 V to 3.6 V
1.8 V to 3.6 V
1.8 V to 3.6 V
1.8 V to 3.6 V
6
dfVLO/dT
Measured at ACLK(1)
Measured at ACLK(2)
Measured at ACLK
dfVLO/dVCC VLO frequency supply voltage drift
Duty cycle
%/V
30
70
%
(1) Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(85°C – (–40°C))
(2) Calculated using the box method: (MAX(1.8 to 3.6 V) – MIN(1.8 to 3.6 V)) / MIN(1.8 to 3.6 V) / (3.6 V – 1.8 V)
Internal Reference, Low-Frequency Oscillator (REFO)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
3
MAX UNIT
REFO oscillator current
consumption
IREFO
TA = 25°C
1.8 V to 3.6 V
µA
Hz
REFO frequency calibrated
Measured at ACLK
Full temperature range
TA = 25°C
1.8 V to 3.6 V
1.8 V to 3.6 V
3 V
32768
fREFO
±3.5
±1.5
%
%
REFO absolute tolerance calibrated
REFO frequency temperature drift
dfREFO/dVCC REFO frequency supply voltage drift Measured at ACLK(2)
dfREFO/dT
Measured at ACLK(1)
1.8 V to 3.6 V
1.8 V to 3.6 V
1.8 V to 3.6 V
1.8 V to 3.6 V
0.01
1.0
50
%/°C
%/V
%
Duty cycle
Measured at ACLK
40%/60% duty cycle
40
60
tSTART
REFO startup time
25
µs
(1) Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(85°C – (–40°C))
(2) Calculated using the box method: (MAX(1.8 to 3.6 V) – MIN(1.8 to 3.6 V)) / MIN(1.8 to 3.6 V) / (3.6 V – 1.8 V)
56
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