MSP430F543XA_12 Datasheet, PDF (50/104 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F543xA, MSP430F541xA
SLAS655B – JANUARY 2010 – REVISED OCTOBER 2010
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Crystal Oscillator, XT2 (continued)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)^{(1) (2)}
PARAMETER
TEST CONDITIONS
V_CC
MIN TYP
XT2DRIVEx = 0, XT2BYPASS = 0,
f_XT2,HF0 = 6 MHz, C_L,eff = 15 pF
450
OA_HF
Oscillation allowance for
HF crystals⁽⁵⁾
XT2DRIVEx = 1, XT2BYPASS = 0,
f_XT2,HF1 = 12 MHz, C_L,eff = 15 pF
XT2DRIVEx = 2, XT2BYPASS = 0,
f_XT2,HF2 = 20 MHz, C_L,eff = 15 pF
320
200
XT2DRIVEx = 3, XT2BYPASS = 0,
f_XT2,HF3 = 32 MHz, C_L,eff = 15 pF
200
t_START,HF
Startup time
f_OSC = 6 MHz
XT2BYPASS = 0, XT2DRIVEx = 0,
T_A = 25°C,
0.5
C_L,eff = 15 pF
3.0 V
f_OSC = 20 MHz
XT2BYPASS = 0, XT2DRIVEx = 2,
T_A = 25°C,
0.3
C_L,eff = 15 pF
C_L,eff
Integrated effective load
capacitance, HF mode^{(6) (1)}
1
MAX
UNIT
Ω
ms
pF
Duty cycle
f_Fault,HF
Oscillator fault frequency⁽⁷⁾
Measured at ACLK, f_XT2,HF2 = 20 MHz
XT2BYPASS = 1⁽⁸⁾
40
50
60 %
30
300 kHz
(5) Oscillation allowance is based on a safety factor of 5 for recommended crystals.
(6) Includes parasitic bond and package capacitance (approximately 2 pF per pin).
Since the PCB adds additional capacitance, it is recommended to verify the correct load by measuring the ACLK frequency. For a
correct setup, the effective load capacitance should always match the specification of the used crystal.
(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
TEST CONDITIONS
V_CC
MIN TYP
f_VLO
VLO frequency
df_VLO/d_T VLO frequency temperature drift
df_VLO/dV_CC VLO frequency supply voltage drift
Measured at ACLK
Measured at ACLK⁽¹⁾
Measured at ACLK⁽²⁾
1.8 V to 3.6 V
1.8 V to 3.6 V
1.8 V to 3.6 V
6 9.4
0.5
4
Duty cycle
Measured at ACLK
1.8 V to 3.6 V
40
50
(1) Calculated using the box method: (MAX(-40 to 85°C) – MIN(-40 to 85°C)) / MIN(-40 to 85°C) / (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
14
60
UNIT
kHz
%/°C
%/V
%
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
I_REFO
REFO oscillator current consumption T_A = 25°C
1.8 V to 3.6 V
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
Duty cycle
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⁾
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(-40 to 85°C) / (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
±3.5
±1.5
60
UNIT
µA
Hz
%
%/°C
%/V
%
µs
50
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