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參數資料
| 型號： | TLV320DAC3100IRHBT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | DAC WITH PROGRAMMABLE PLL, PQCC32 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件頁數： | 48/97頁 |
| 文件大小： | 1134K |
| 代理商： | TLV320DAC3100IRHBT |
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PLL _ CLKIN
512 kHz
20 MHz
P
PLL _ CLKIN
10 MHz
20 MHz
P
SLAS671 – FEBRUARY 2010
www.ti.com
The PLL can be turned on via page 0 / register 5, bit D7. The variable P can be programmed via page 0 /
register 5, bits D6–D4. The variable R can be programmed via page 0 / register 5, bits D3–D0. The
variable J can be programmed via page 0 / register 6, bits D5–D0. The variable D is 14 bits and is
programmed into two registers. The MSB portion can be programmed via page 0 / register 7, bits D5–D0,
and the LSB portion is programmed via page 0 / register 8, bits D7–D0. For proper update of the D divider
value, page 0 / register 7 must be programmed first, followed immediately by page 0 / register 8. Unless
the write to page 0 / register 8 is completed, the new value of D does not take effect.
When the PLL is enabled, the following conditions must be satisfied:
When the PLL is enabled and D = 0, the following conditions must be satisfied for PLL_CLKIN:
(7)
When the PLL is enabled and D
≠ 0, the following conditions must be satisfied for PLL_CLKIN:
(8)
The PLL can be powered up independently from the DAC block, and can also be used as a
general-purpose PLL by routing its output to the GPIO output. After powering up the PLL, PLL_CLK is
available typically after 10 ms.
The clock for the codec and various signal processing blocks, CODEC_CLKIN, can be generated from the
MCLK input, BCLK input, GPIO input, or PLL_CLK (page 0 / register 4, bits D1–D0).
If CODEC_CLKIN is derived from the PLL, then the PLL must be powered up first and powered down last.
Table 5-29 lists several example cases of typical PLL_CLKIN rates and how to program the PLL to
achieve a sample rate fS of either 44.1 kHz or 48 kHz.
Table 5-29. PLL Example Configurations
PLL_CLKIN (MHz)
PLLP
PLLR
PLLJ
PLLD
MDAC
NDAC
DOSR
fS = 44.1 kHz
2.8224
1
3
10
0
3
5
128
5.6448
1
3
5
0
3
5
128
12
1
7
560
3
5
128
13
1
6
3504
6
3
104
16
1
5
2920
3
5
128
19.2
1
4
4100
3
5
128
48
4
1
7
560
3
5
128
fS = 48 kHz
2.048
1
3
14
0
7
2
128
3.072
1
4
7
0
7
2
128
4.096
1
3
7
0
7
2
128
6.144
1
2
7
0
7
2
128
8.192
1
4
3
0
4
128
12
1
7
1680
7
2
128
16
1
5
3760
7
2
128
19.2
1
4
4800
7
2
128
48
4
1
7
1680
7
2
128
52
APPLICATION INFORMATION
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TLV320DAC3100
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