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TNETV1647GSTZWT 데이터시트(PDF) 107 Page - Texas Instruments

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부품명 TNETV1647GSTZWT
상세설명  Digital Media System-on-Chip
PDF  236 Pages
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI1 - Texas Instruments

TNETV1647GSTZWT 데이터시트(HTML) 107 Page - Texas Instruments

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M24XI
M24XO
M24VSS
M24VDD
C1
C2
Crystal
24 MHz
1.8 V
RBIAS
(optional)
C
L
+
C
1C2
(C
1
) C2)
TMS320DM6441
www.ti.com
SPRS359E – SEPTEMBER 2006 – REVISED AUGUST 2010
Table 6-10. Crystal Requirements for a 27-MHz System Oscillator
PARAMETER
MIN
TYP
MAX
UNIT
Start-up time (from power up until oscillating at stable frequency of 27 MHz)
4
ms
Oscillation frequency
27
MHz
ESR
60
Ω
Frequency stability
±50
ppm
6.5.1.2
24-MHz Crystal for USB Oscillator
In this option, a crystal is used as the external clock input to the DM6441 USB PLL.
The 24-MHz oscillator provides the reference clock for the DM6441 USB peripheral. The on-chip oscillator
requires an external 24-MHz crystal connected across the M24XI and M24XO pins, along with two load
capacitors, as shown in Figure 6-11.The external crystal load capacitors must be connected only to the
24-MHz oscillator ground pin (M24VSS). Do not connect to board ground (VSS).
Figure 6-11. 24-MHz USB Oscillator
The RBIAS resistor is optional. If the RBIAS resistor is used, it should equal 1 M
Ω ± 5%. The load
capacitors, C1 and C2, should be chosen such that the equation is satisfied (typical values are C1 = C2 =
10 pF). CL in the equation is the load specified by the crystal manufacturer. All discrete components used
to implement the oscillator circuit should be placed as close as possible to the associated oscillator pins
(M24XI and M24XO) and to the M24XVSS pin.
Table 6-11. Crystal Requirements for a 24-MHz USB Oscillator
PARAMETER
MIN
TYP
MAX
UNIT
Start-up time (from power up until oscillating at stable frequency of 24 MHz)
4
ms
Oscillation frequency
24
MHz
ESR
60
Ω
Frequency stability
±50
ppm
Copyright © 2006–2010, Texas Instruments Incorporated
Peripheral and Electrical Specifications
107
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Product Folder Link(s): TMS320DM6441



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