WM5102 datasheet(322/334 Pages) WOLFSON

Part #	WM5102

Description	Audio Hub CODEC with Voice Processor DSP

PDF	334 Pages

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Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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322 / 334 page

WM5102

Production Data

PD, June 2014, Rev 4.2

322

Figure 91 External Accessory Detection

The accessory detection circuit measures the impedance of an external load connected to one of the

MICDET pins.

The microphone detection circuit uses MICVDD, MICBIAS1, MICBIAS2 or MICBIAS3 as a reference.

The applicable source is configured using the MICD_BIAS_SRC register.

The WM5102 can detect the presence of a typical microphone and up to 6 push-buttons, using the

components shown in Figure 92. When the microphone detection circuit is enabled, then each of the

push-buttons shown will cause a different bit within the MICD_LVL register to be set.

The microphone detect function is specifically designed to detect a video accessory (typical 75

) load

if required. A measured external impedance of 75

 will cause the MICD_LVL [3] bit to be set.

Figure 92 External Accessory Detect Connection

WM5102 Datasheet(PDF) 322 Page - Wolfson Microelectronics plc