SLAU472C February 2013 – November 2023 TAS2505 , TAS2505-Q1
In the TAS2505, the PLL_CLK supports a wide range of output clock, based on register settings and power-supply conditions.
AVDD | PLL Mode Page 0, Reg 4, D6 | Min PLL_CLK frequency (MHz) | Max PLL_CLK frequency (MHz) |
---|---|---|---|
≥1.5V | 0 | 75 | 110 |
1 | 90 | 119 | |
≥1.65V | 0 | 75 | 130 |
1 | 90 | 130 | |
≥1.80V | 0 | 75 | 140 |
1 | 90 | 150 |
The PLL can be powered up independently from the ADC and DAC blocks, 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 10ms. The PLL output frequency is controlled by J.D and R dividers
PLL Divider | Bits |
---|---|
J | Page 0, Register 6, D(5:0) |
D | Page 0, Register 7, D(5:0) and Page 0, Register 8, D(7:0) |
R | Page 0, Register 5, D(3:0) |
The D-divider value is 14-bits wide and is controlled by 2 registers. 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 will not take effect
The clocks for codec and various signal processing blocks, CODEC_CLKIN can be generated from MCLK input, BCLK input, GPIO input or PLL_CLK (Page 0, Register 4, Bit D1 to D0) ).
If the CODEC_CLKIN is derived from the PLL, then the PLL must be powered up first and powered down last.
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 | 1 | 7 | 560 | 3 | 5 | 128 |
13 | 1 | 1 | 6 | 3504 | 6 | 3 | 104 |
16 | 1 | 1 | 5 | 2920 | 3 | 5 | 128 |
19.2 | 1 | 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 | 4 | 128 |
12 | 1 | 1 | 7 | 1680 | 7 | 2 | 128 |
16 | 1 | 1 | 5 | 3760 | 7 | 2 | 128 |
19.2 | 1 | 1 | 4 | 4800 | 7 | 2 | 128 |
48 | 4 | 1 | 7 | 1680 | 7 | 2 | 128 |