參數(shù)資料
型號(hào)： MSP430F5152IRSBT
廠商： TEXAS INSTRUMENTS INC
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 25 MHz, RISC MICROCONTROLLER, PQCC40
封裝： GREEN, PLASTIC, WQFN-40
文件頁(yè)數(shù)： 44/102頁(yè)
文件大小： 1183K
代理商： MSP430F5152IRSBT
MSP430F51x1
MSP430F51x2
SLAS619A
– AUGUST 2010 – REVISED AUGUST 2011
Crystal Oscillator, XT1, High-Frequency Mode
(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
UNIT
fOSC = 4 MHz,
XTS = 1, XOSCOFF = 0,
200
XT1BYPASS = 0, XT1DRIVEx = 0,
TA = 25°C
fOSC = 12 MHz,
XTS = 1, XOSCOFF = 0,
260
XT1BYPASS = 0, XT1DRIVEx = 1,
Differential XT1 oscillator crystal
TA = 25°C
IDVCC,HF
current consumption from lowest
A
fOSC = 20 MHz,
drive setting, HF mode
XTS = 1, XOSCOFF = 0,
3 V
325
XT1BYPASS = 0, XT1DRIVEx = 2,
TA = 25°C
fOSC = 32 MHz,
XTS = 1, XOSCOFF = 0,
450
XT1BYPASS = 0, XT1DRIVEx = 3,
TA = 25°C
XT1 oscillator crystal frequency,
XTS = 1,
fXT1,HF0
4
8
MHz
HF mode 0
XT1BYPASS = 0, XT1DRIVEx = 0(2)
XT1 oscillator crystal frequency,
XTS = 1,
fXT1,HF1
8
16
MHz
HF mode 1
XT1BYPASS = 0, XT1DRIVEx = 1(2)
XT1 oscillator crystal frequency,
XTS = 1,
fXT1,HF2
16
24
MHz
HF mode 2
XT1BYPASS = 0, XT1DRIVEx = 2(2)
XT1 oscillator crystal frequency,
XTS = 1,
fXT1,HF3
24
32
MHz
HF mode 3
XT1BYPASS = 0, XT1DRIVEx = 3(2)
XT1 oscillator logic-level
XTS = 1,
fXT1,HF,SW
square-wave input frequency,
0.7
32
MHz
XT1BYPASS = 1(3) (2)
HF mode
XTS = 1,
XT1BYPASS = 0, XT1DRIVEx = 0,
450
fXT1,HF = 6 MHz, CL,eff = 15 pF
XTS = 1,
XT1BYPASS = 0, XT1DRIVEx = 1,
320
fXT1,HF = 12 MHz, CL,eff = 15 pF
Oscillation allowance for
OAHF
k
HF crystals(4)
XTS = 1,
XT1BYPASS = 0, XT1DRIVEx = 2,
200
fXT1,HF = 20 MHz, CL,eff = 15 pF
XTS = 1,
XT1BYPASS = 0, XT1DRIVEx = 3,
200
fXT1,HF = 32 MHz, CL,eff = 15 pF
fOSC = 6 MHz, XTS = 1,
XT1BYPASS = 0, XT1DRIVEx = 0,
0.5
TA = 25°C, CL,eff = 15 pF
tSTART,HF
Startup time, HF mode
3 V
ms
fOSC = 20 MHz, XTS = 1,
XT1BYPASS = 0, XT1DRIVEx = 2,
0.3
TA = 25°C, CL,eff = 15 pF
(1)
To improve EMI on the XT1 oscillator the following guidelines should be observed.
(a) Keep the traces between the device and the crystal as short as possible.
(b) Design a good ground plane around the oscillator pins.
(c) Prevent crosstalk from other clock or data lines into oscillator pins XIN and XOUT.
(d) Avoid running PCB traces underneath or adjacent to the XIN and XOUT pins.
(e) Use assembly materials and praxis to avoid any parasitic load on the oscillator XIN and XOUT pins.
(f) If conformal coating is used, ensure that it does not induce capacitive/resistive leakage between the oscillator pins.
(2)
Maximum frequency of operation of the entire device cannot be exceeded.
(3)
When XT1BYPASS is set, the VLO, REFO, XT1 circuits are automatically powered down.
(4)
Oscillation allowance is based on a safety factor of 5 for recommended crystals.
46
Copyright
2010–2011, Texas Instruments Incorporated
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