MSP432P401R Datasheet, PDF (33/157 Pages) Texas Instruments – Mixed-Signal Microcontrollers

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MSP432P401R, MSP432P401M
SLAS826B – MARCH 2015 – REVISED FEBRUARY 2016
High-Frequency Crystal Oscillator, HFXT (continued)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V_CC
f_OSC = 1 MHz
HFXTBYPASS = 0, HFXTDRIVE = 0,
HFFREQ = 0
C_L,eff = 16 pF
Typical ESR , C_SHUNT
FCNTHF_EN = 0
MIN TYP MAX UNIT
3.57
f_OSC = 4 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 0
C_L,eff = 16 pF
Typical ESR , C_SHUNT
FCNTHF_EN = 0
f_OSC = 8 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 1
C_L,eff = 16 pF
Typical ESR , C_SHUNT
FCNTHF_EN = 0
0.89
ms
0.66
t_START,HFXT Start-up time⁽⁴⁾
f_OSC = 16 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 2
C_L,eff = 16 pF
Typical ESR , C_SHUNT
FCNTHF_EN = 0
f_OSC = 24 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 3
C_L,eff = 16 pF
Typical ESR , C_SHUNT
FCNTHF_EN = 0
3.0 V
0.53
470
f_OSC = 32 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 4
C_L,eff = 16 pF
Typical ESR , C_SHUNT
FCNTHF_EN = 0
f_OSC = 40 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 5
C_L,eff = 16 pF
Typical ESR , C_SHUNT
FCNTHF_EN = 0
435
µs
425
f_OSC = 48 MHz
HFXTBYPASS = 0, HFXTDRIVE = 1,
HFFREQ = 6
C_L,eff = 16 pF
420
Typical ESR , C_SHUNT
FCNTHF_EN = 0
C_L,eff
f_Fault,HFXT
Integrated effective load
capacitance^{(5) (6)}
Oscillator fault frequency^{(7) (8)}
1
pF
400
700 kHz
(4) Does not include programable startup counter.
(5) Includes parasitic bond and package capacitance (approximately 2 pF per pin).
Because the PCB adds additional capacitance, TI recommeds verifying the correct load by measuring the oscillator frequency through
MCLK or SMCLK. For a correct setup, the effective load capacitance should always match the specification of the crystal.
(6) Requires external capacitors at both terminals. Values are specified by crystal manufacturers. Recommended values supported are
14 pF, 16 pF, and 18 pF. Maximum shunt capacitance of 7 pF.
(7) Frequencies above the MAX specification do not set the fault flag. Frequencies in between the MIN and MAX might set the flag. A static
condition or stuck at fault condition will set the flag.
(8) Measured with logic-level input frequency but also applies to operation with crystals.
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Specifications
33