參數資料
型號: TLV320AIC32IRHBG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQCC32
封裝: 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁數: 17/72頁
文件大?。?/td> 4594K
代理商: TLV320AIC32IRHBG4
www.ti.com
TLV320AIC32
SLAS479A – AUGUST 2005 – REVISED SEPTEMBER 2005
OVERVIEW (continued)
R = 1, 2,
…, 16
K = J.D
J = 1, 2, 3,
…, 64
D = 0000, 0001, 0002, 0003,
…, 9998, 9999
PLLCLK_IN can be MCLK or BCLK, selected by register 102, bits D5-D4
P, R, J, and D are register programmable. J is the integer portion of K (the numbers to the left of the decimal
point), while D is the fractional portion of K (the numbers to the right of the decimal point, assuming four digits of
precision).
Examples:
If K = 8.5, then J = 8, D = 5000
If K = 7.12, then J = 7, D = 1200
If K = 14.03, then J = 14, D = 0300
If K = 6.0004, then J = 6, D = 0004
When the PLL is enabled and D = 0000, the following conditions must be satisfied:
384 kHz
≤ ( PLLCLK_IN / P ) ≤ 20 MHz
80 MHz
≤ (PLLCLK _IN × K × R / P ) ≤ 110 MHz
4
≤ J ≤ 55
When the PLL is enabled and D
≠0000, the following conditions must be satisfied:
10 MHz
≤ PLLCLK _IN / P ≤ 20 MHz
80 MHz
≤ PLLCLK _IN × K × R / P ≤ 110 MHz
4
≤ J ≤ 11
R = 1
Example:
MCLK = 12 MHz and Fsref = 44.1 kHz
Select P = 1, R = 1, K = 7.5264, which results in J = 7, D = 5264
Example:
MCLK = 12 MHz and Fsref = 48.0 kHz
Select P = 1, R = 1, K = 8.192, which results in J = 8, D = 1920
The table below lists several example cases of typical MCLK rates and how to program the PLL to achieve Fsref
= 44.1 kHz or 48 kHz.
Fsref = 44.1 kHz
MCLK (MHz)
P
R
J
D
ACHIEVED FSREF
% ERROR
2.8224
1
32
0
44100.00
0.0000
5.6448
1
16
0
44100.00
0.0000
12.0
1
7
5264
44100.00
0.0000
13.0
1
6
9474
44099.71
0.0007
16.0
1
5
6448
44100.00
0.0000
19.2
1
4
7040
44100.00
0.0000
19.68
1
4
5893
44100.30
–0.0007
48.0
4
1
7
5264
44100.00
0.0000
Fsref = 44.1 kHz
MCLK (MHz)
P
R
J
D
ACHIEVED FSREF
% ERROR
2.048
1
48
0
48000.00
0.0000
3.072
1
32
0
48000.00
0.0000
4.096
1
24
0
48000.00
0.0000
6.144
1
16
0
48000.00
0.0000
8.192
1
12
0
48000.00
0.0000
12.0
1
8
1920
48000.00
0.0000
24
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