Datasheet
ECCN 5E002 TSPA - Technology / Software Publicly Available
MSP430F677x
,
MSP430F676x
,
MSP430F674x
SLAS768D –SEPTEMBER 2012–REVISED DECEMBER 2013
www.ti.com
Internal Very-Low-Power Low-Frequency Oscillator (VLO)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
f
VLO
VLO frequency Measured at ACLK 1.8 V to 3.6 V 6 9.6 15 kHz
df
VLO
/d
T
VLO frequency temperature drift Measured at ACLK 1.8 V to 3.6 V 0.5 %/°C
df
VLO
/dV
CC
VLO frequency supply voltage drift Measured at ACLK 1.8 V to 3.6 V 4 %/V
Duty cycle Measured at ACLK 1.8 V to 3.6 V 40 50 60 %
Internal Reference, Low-Frequency Oscillator (REFO)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
I
REFO
REFO oscillator current consumption T
A
= 25°C 1.8 V to 3.6 V 3 µA
REFO frequency calibrated Measured at ACLK 1.8 V to 3.6 V 32768 Hz
f
REFO
Full temperature range 1.8 V to 3.6 V -3.5 +3.5 %
REFO absolute tolerance calibrated
T
A
= 25°C 3 V -1.5 +1.5 %
df
REFO
/d
T
REFO frequency temperature drift Measured at ACLK 1.8 V to 3.6 V 0.01 %/°C
df
REFO
/dV
CC
REFO frequency supply voltage drift Measured at ACLK 1.8 V to 3.6 V 1.0 %/V
Duty cycle Measured at ACLK 1.8 V to 3.6 V 40 50 60 %
t
START
REFO startup time 40%/60% duty cycle 1.8 V to 3.6 V 25 µs
DCO Frequency
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
f
DCO(0,0)
DCO frequency (0, 0)
(1)
DCORSELx = 0, DCOx = 0, MODx = 0 0.07 0.20 MHz
f
DCO(0,31)
DCO frequency (0, 31)
(1)
DCORSELx = 0, DCOx = 31, MODx = 0 0.70 1.70 MHz
f
DCO(1,0)
DCO frequency (1, 0)
(1)
DCORSELx = 1, DCOx = 0, MODx = 0 0.15 0.36 MHz
f
DCO(1,31)
DCO frequency (1, 31)
(1)
DCORSELx = 1, DCOx = 31, MODx = 0 1.47 3.45 MHz
f
DCO(2,0)
DCO frequency (2, 0)
(1)
DCORSELx = 2, DCOx = 0, MODx = 0 0.32 0.75 MHz
f
DCO(2,31)
DCO frequency (2, 31)
(1)
DCORSELx = 2, DCOx = 31, MODx = 0 3.17 7.38 MHz
f
DCO(3,0)
DCO frequency (3, 0)
(1)
DCORSELx = 3, DCOx = 0, MODx = 0 0.64 1.51 MHz
f
DCO(3,31)
DCO frequency (3, 31)
(1)
DCORSELx = 3, DCOx = 31, MODx = 0 6.07 14.0 MHz
f
DCO(4,0)
DCO frequency (4, 0)
(1)
DCORSELx = 4, DCOx = 0, MODx = 0 1.3 3.2 MHz
f
DCO(4,31)
DCO frequency (4, 31)
(1)
DCORSELx = 4, DCOx = 31, MODx = 0 12.3 28.2 MHz
f
DCO(5,0)
DCO frequency (5, 0)
(1)
DCORSELx = 5, DCOx = 0, MODx = 0 2.5 6.0 MHz
f
DCO(5,31)
DCO frequency (5, 31)
(1)
DCORSELx = 5, DCOx = 31, MODx = 0 23.7 54.1 MHz
f
DCO(6,0)
DCO frequency (6, 0)
(1)
DCORSELx = 6, DCOx = 0, MODx = 0 4.6 10.7 MHz
f
DCO(6,31)
DCO frequency (6, 31)
(1)
DCORSELx = 6, DCOx = 31, MODx = 0 39.0 88.0 MHz
f
DCO(7,0)
DCO frequency (7, 0)
(1)
DCORSELx = 7, DCOx = 0, MODx = 0 8.5 19.6 MHz
f
DCO(7,31)
DCO frequency (7, 31)
(1)
DCORSELx = 7, DCOx = 31, MODx = 0 60 135 MHz
Frequency step between range
S
DCORSEL
S
RSEL
= f
DCO(DCORSEL+1,DCO)
/f
DCO(DCORSEL,DCO)
1.2 2.3 ratio
DCORSEL and DCORSEL + 1
Frequency step between tap
S
DCO
S
DCO
= f
DCO(DCORSEL,DCO+1)
/f
DCO(DCORSEL,DCO)
1.02 1.12 ratio
DCO and DCO + 1
Duty cycle Measured at SMCLK 40 50 60 %
df
DCO
/dT DCO frequency temperature drift f
DCO
= 1 MHz 0.1 %/°C
(1) When selecting the proper DCO frequency range (DCORSELx), the target DCO frequency, f
DCO
, should be set to reside within the
range of f
DCO(n, 0),MAX
≤ f
DCO
≤ f
DCO(n, 31),MIN
, where f
DCO(n, 0),MAX
represents the maximum frequency specified for the DCO frequency,
range n, tap 0 (DCOx = 0) and f
DCO(n,31),MIN
represents the minimum frequency specified for the DCO frequency, range n, tap
31 (DCOx = 31). This ensures that the target DCO frequency resides within the range selected. It should also be noted that if the actual
f
DCO
frequency for the selected range causes the FLL or the application to select tap 0 or 31, the DCO fault flag is set to report that the
selected range is at its minimum or maximum tap setting.
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