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CP3SP33SMS/NOPB датащи(PDF) 83 Page - Texas Instruments

номер детали CP3SP33SMS/NOPB
подробное описание детали  Connectivity Processor with Cache, DSP, and Bluetooth짰, USB, and Dual CAN Interfaces
PDF  407 Pages
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домашняя страница  http://www.ti.com
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CP3SP33SMS/NOPB датащи(HTML) 83 Page - Texas Instruments

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OUT
IN
NMOD
NDIV
32
F
F
MDIV PDIV
§
·
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u ¨
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u
¨
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¹
VCO
IN
NMOD
F
F
32 MDIV
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¹
(2 )/(
)
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CP3SP33
www.ti.com
SNOSCW5 – MAY 2013
The reference frequency FREF is derived from the input frequency FIN, as described by the following
equation:
(1)
The voltage-controlled oscillator output frequency FVCO is derived from the input frequency FIN, as
described by the following equation:
(2)
FREF must be between 2 and 4 MHz. FVCO must not exceed 153 MHz.
The output frequency FOUT is derived from the input frequency FIN, as described by the following
equation:
(3)
It is possible for software to load divisors that result in unstable or marginally stable PLL operation.
Therefore, only divisors recommended in Table 14-3 and Table 14-4 should be used. If any other
frequencies are desired, contact Texas Instruments.
Table 14-3. Recommended HCLK Clock Divisors
FIN
FOUT
M Div.
N Div.
N Mod.
P Div.
(MHz)
(MHz)
12
4
32
0
4
24
12
6
64
0
4
32
12
4
48
0
4
36
12
4
32
0
2
48
12
3
30
0
2
60
12
6
64
0
2
64
12
4
48
0
2
72
12
4
30
0
1
90
12
3
24
0
1
96
The PLLs are designed to drive the telematics codec and other devices with audio sample rates (Fs) of
44.1 kHz and 48 kHz (as well as 32 kHz, 24 kHz, 22.05 kHz, etc.) and 125× or 250× oversampling.
Therefore, the two common clock requirements are 11.025 MHz (44.1 kHz × 250) and 12.000 MHz
(48 kHz × 250). These frequencies can be obtained from any common input clock rate between 10 MHz
and 20 MHz as shown in Table 14-4.
Table 14-4. Recommended Audio Clock Divisors
FS
FIN
SOURCE
M Div.
N Div.
N Mod.
P Div.
(kHz)
(MHz)
System
44.1
11
5
55
4
11
System
44.1
11.2896
4
46
2
12
System
44.1
12
5
55
3
12
System
44.1
13
5
55
4
13
System
44.1
14.4
4
30
20
10
Copyright © 2013, Texas Instruments Incorporated
Clock Generation
83
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Product Folder Links :CP3SP33



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