Datasheet

MSP430FG47x
MIXED SIGNAL MICROCONTROLLER
SLAS580D -- OCTOBER 2008 -- REVISED MARCH 2011
38
POST OFFICE BOX 655303  DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted)
crystal oscillator, LFXT1, high frequency modes
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
f
LFXT1
LFXT1 oscillator crystal frequency Ceramic resonator 1.8 V to 3.6 V 0.45 8 MHz
f
LFXT1
LFXT1 oscillator crystal frequency Crystal resonator 1.8 V to 3.6 V 1 8 MHz
C
L,eff
Integrated effective load
capacitance, HF mode
(see Note 1)
(see Note 2) 1 pF
Duty cycle Measured at P1.5/ACLK, 2.2 V/3 V 40 50 60 %
NOTES: 1. 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 s pecification of the used crystal.
2. Requires external capacitors at both terminals. Values are specified by crystal manufacturers.
crystal oscillator, XT2, high frequency modes
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
f
XT2
XT2 oscillator crystal frequency Ceramic resonator 1.8 V to 3.6 V 0.45 8 MHz
f
XT2
XT2 oscillator crystal frequency Crystal resonator 1.8 V to 3.6 V 1 8 MHz
C
L,eff
Integrated effective load
capacitance, HF mode
(see Note 1)
(see Note 2) 1 pF
Duty cycle Measured at P1.4/SMCLK, 2.2 V/3 V 40 50 60 %
NOTES: 1. 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 s pecification of the used crystal.
2. Requires external capacitors at both terminals. Values are specified by crystal manufacturers.