MSP430FR59691 Datasheet, PDF (28/131 Pages) Texas Instruments – MSP430FR59xx Mixed-Signal Microcontrollers

MSP430FR5969, MSP430FR59691, MSP430FR5968, MSP430FR5967
MSP430FR5959, MSP430FR5958, MSP430FR5957
MSP430FR5949, MSP430FR5948, MSP430FR5947, MSP430FR59471
SLAS704C – OCTOBER 2012 – REVISED JUNE 2014
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High-Frequency Crystal Oscillator, HFXT⁽¹⁾ (continued)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
C_HFXIN
PARAMETER
Integrated load capacitance at
HFXIN terminaI^{(6) (7)}
TEST CONDITIONS
V_CC
MIN TYP MAX UNIT
2
pF
C_HFXOUT
f_Fault,HFXT
Integrated load capacitance at
HFXOUT terminaI^{(6) (7)}
Oscillator fault frequency^{(8) (9)}
2
pF
0
800 kHz
(6) This represents all the parasitic capacitance present at the HFXIN and HFXOUT terminals, respectively, including parasitic bond and
package capacitance. The effective load capacitance, C_L,eff can be computed as C_IN x C_OUT / (C_IN + C_OUT), where C_IN and C_OUT is the
total capacitance at the HFXIN and HFXOUT terminals, respectively.
(7) Requires external capacitors at both terminals to meet the effective load capacitance specified by crystal manufacturers. Recommended
effective load capacitance values supported are 14 pF, 16pF, and 18 pF. Maximum shunt capacitance of 7 pF. The PCB adds additional
capacitance, so it must also be considered in the overall capacitance. It is recommended to verify that the recommended effective load
capacitance of the selected crystal is met.
(8) 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.
(9) Measured with logic-level input frequency but also applies to operation with crystals.
28
Specifications
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