PCM1861 datasheet(27/115 Pages) TI

27 / 115 page

Master Mode Only

MUX

SCK

PLL Clock

Clock

Divider

Audio ADC Clocks

MUX

Clock

Divider

SCK

PLL Clock

DSP #1

MUX

SCK

Clock

Divider

DSP #2

PLL Clock

MUX

Clock

Divider

MUX

Clock

Divider

MUX

PLL Clock

SCK_OUT_TO_GPIO

BCK_i

MUX

BCK OUT IN

MASTER MODE

MUX

PLL

SCK

BCK

SCK

PLL Source

Select

SCK/ PLL Select

Mux’s

ADC_CLK_SRC

(Page 0 Reg 0x20)

DSP2_CLK_SRC

(Page 0 Reg 0x20)

DSP1_CLK_SRC

(Page 0 Reg 0x20)

Autoset by format

MUX

Clock

Divider

LRCK

LRCK OUT IN

MASTER MODE

CLK_DIV_MST_SCK

(Page 0 Reg 0x26)

CLK_DIV_MST_BCK

(Page 0 Reg 0x27)

SCK_XI_SEL[1:0]

(Page 0 Reg 0x20)

MST_SCK_SRC

(Page 0 Reg 0x20)

PCM1861, PCM1863, PCM1865

www.ti.com

SLAS831C – MARCH 2014 – REVISED AUGUST 2014

8.13.3 Device Clock Distribution and Generation

Figure 28. PCM186x Main Audio Clock Tree and Clock Generation

PLLs are used in all modes to generate the clocks required to run both fixed-function DSPs. The dividers are

automatically configured based on the clock rate detection. The clock architecture above allows non-audio clock

sources to be used as clock sources and the PCM186x to continue to run in a Master mode, providing all

PCM/I2S Clocks for other converters in the system.

8.13.4 PCM186x Clocking Modes

There are four different clocking modes available on the device which can take advantage of the onboard PLL

and clock detection. Advanced clock detection and a smart internal state engine in the PCM186x can

automatically configure the various dividers in the device (shown in Device Clock Distribution and Generation)

with optimized values. Automatic clock configuration is enabled by default, using the register CLKDET_EN

(Page.0, 0x20).

External XTAL/MCK

NAME

Device

BCK, LRCK Direction

PLL Configuration

INPUT

ADC Master Mode

PCM1861/3/5

YES

OUT

Not Required

ADC Slave Mode

PCM1861/3/5

YES

Not Required

Automatic for standard

ADC Slave PLL Mode

PCM1863/5

audio rates

ADC Non-Audio MCK

PCM1863/5

YES

OUT

Manual

Submit Documentation Feedback

Product Folder Links: PCM1861 PCM1863 PCM1865

PCM1861 Datasheet(PDF) 27 Page - Texas Instruments

PCM1861 Datasheet(HTML) 27 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL