MSP430F673X Datasheet, PDF (56/121 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F673x
MSP430F672x
SLAS731A – DECEMBER 2011 – REVISED APRIL 2012
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Crystal Oscillator, XT1, Low-Frequency Mode⁽¹⁾ (continued)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
Duty cycle LF mode
f_Fault,LF
Oscillator fault frequency,
LF mode⁽⁷⁾
TEST CONDITIONS
XTS = 0, Measured at ACLK,
f_XT1,LF = 32768 Hz
XTS = 0⁽⁸⁾
V_CC
MIN TYP MAX UNIT
30
70 %
10
10000 Hz
t_START,LF Startup time, LF mode
f_OSC = 32768 Hz, XTS = 0, XT1BYPASS = 0,
XT1DRIVEx = 0, T_A = 25°C, C_L,eff = 6 pF
f_OSC = 32768 Hz, XTS = 0, XT1BYPASS = 0,
XT1DRIVEx = 3, T_A = 25°C, C_L,eff = 12 pF
3.0 V
1000
ms
500
(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
f_VLO
VLO frequency
df_VLO/d_T VLO frequency temperature drift
df_VLO/dV_CC VLO frequency supply voltage drift
Duty cycle
TEST CONDITIONS
Measured at ACLK
Measured at ACLK⁽¹⁾
Measured at ACLK⁽²⁾
Measured at ACLK
V_CC
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
MIN TYP
6 9.4
0.5
4
30
(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)
MAX
15
70
UNIT
kHz
%/°C
%/V
%
Internal Reference, Low-Frequency Oscillator (REFO)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
I_REFO
PARAMETER
REFO oscillator current
consumption
TEST CONDITIONS
T_A = 25°C
V_CC
1.8 V to 3.6 V
MIN TYP
3
REFO frequency calibrated
Measured at ACLK
1.8 V to 3.6 V
32768
f_REFO
df_REFO/d_T
df_REFO/dV_CC
REFO absolute tolerance calibrated
REFO frequency temperature drift
REFO frequency supply voltage drift
Full temperature range
T_A = 25°C
Measured at ACLK⁽¹⁾
Measured at ACLK⁽²⁾
Duty cycle
Measured at ACLK
1.8 V to 3.6 V
3V
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
40
50
t_START
REFO startup time
40%/60% duty cycle
1.8 V to 3.6 V
25
(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)
MAX UNIT
µA
Hz
±3.5 %
±1.5 %
%/°C
%/V
60 %
µs
56
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