WM5102 datasheet(157/334 Pages) WOLFSON

157 / 334 page

Production Data

WM5102

PD, June 2014, Rev 4.2

157

OUTPUT SIGNAL PATH CONTROL

Under default register conditions, the output paths are configured for optimum power consumption.

Audio performance can be improved using the register bits defined in Table 63, but power

consumption is also increased.

A high performance mode can be selected on the output signal paths by setting the _OSR bits for the

respective paths. When the OUTn_OSR bit is set, the audio performance is improved, but power

consumption is also increased.

The DAC clocking frequency for outputs paths OUT1, OUT2 and OUT3 can be controlled using the

DACn_FREQ_LIM registers. Under normal operating conditions, the 6.144MHz (or 5.6448MHz) clock

frequency is used. Under specific signal conditions, the use of higher clock frequencies can improve

the noise performance. Note that the DACn_FREQ_LIM registers select the upper frequency limit; the

actual clock frequency is controlled dynamically according to the signal conditions.

The recommended options for configuring the Headphone output paths (OUT1 and OUT2) are noted

in Table 60.

DESCRIPTION

OUT1_OSR,

OUT2_OSR

DAC1_FREQ_LIM,

DAC2_FREQ_LIM

Low Power (default)

Normal operation

High Performance

Table 60 Headphone Output Control

The recommended options for configuring the Earpiece output path (OUT3) are noted in Table 61.

DESCRIPTION

OUT3_OSR

DAC3_FREQ_LIM

Low Power (default)

Normal operation

Table 61 Earpiece Output Control

The SPKCLK frequency of the PDM output path (OUT5) is controlled by the OUT5_OSR register, as

described in Table 62. When the OUT5_OSR bit is set, the audio performance is improved, but power

consumption is also increased.

Note that the SPKCLK frequencies noted in Table 62 assume that the SYSCLK frequency is a

multiple of 6.144MHz (SYSCLK_FRAC=0). If the SYSCLK frequency is a multiple of 5.6448MHz

(SYSCLK_FRAC=1), then the SPKCLK frequencies will be scaled accordingly.

CONDITION

SPKCLK FREQUENCY

OUT5_OSR = 0

3.072MHz

OUT5_OSR = 1

6.144MHz

Table 62 SPKCLK Frequency

WM5102 Datasheet(PDF) 157 Page - Wolfson Microelectronics plc

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