MSP430FR573X Datasheet, PDF (55/109 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430FR573x
MSP430FR572x
www.ti.com
SLAS639D – JULY 2011 – REVISED AUGUST 2012
Crystal Oscillator, XT1, High-Frequency (HF) Mode ⁽¹⁾ (continued)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
C_L,eff
PARAMETER
Integrated effective load
capacitance ^{(7) (8)}
TEST CONDITIONS
XTS = 1
V_CC
MIN TYP
1
f_Fault,HF
Duty cycle, HF mode
XTS = 1, Measured at ACLK,
f_XT1,HF2 = 24 MHz
Oscillator fault frequency, HF mode
(9)
XTS = 1 ⁽¹⁰⁾
40
50
145
MAX UNIT
pF
60 %
900 kHz
(7) Includes parasitic bond and package capacitance (approximately 2 pF per pin). Because 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.
(8) 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.
(9) 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.
(10) 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
f_VLO,DC
Duty cycle
TEST CONDITIONS
Measured at ACLK
Measured at ACLK ⁽¹⁾
Measured at ACLK ⁽²⁾
Measured at ACLK
V_CC
2 V to 3.6 V
2 V to 3.6 V
2 V to 3.6 V
2 V to 3.6 V
MIN TYP
5 8.3
0.5
4
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(2.0 to 3.6 V) – MIN(2.0 to 3.6 V)) / MIN(2.0 to 3.6 V) / (3.6 V – 2 V)
MAX
13
60
UNIT
kHz
%/°C
%/V
%
Copyright © 2011–2012, Texas Instruments Incorporated
Submit Documentation Feedback
55