Specifications

 The WM9715L audio amplifier differential output is routed to the system speaker

connector (P15).

This output is designed to differentially drive an 8Ω mono speaker.

 The line-in inputs are routed to the extender board connector (P3).

Each of the audio inputs may be multiplexed to each of the audio outputs or into the AC`97

interface for digital recording. The AC`97 interface output may also be multiplexed into

any of the analog audio outputs for digital playback.

Audio multiplexing and gain control is supported through Linux and Win CE packages

provided for the EM-X270.

Audio Specifications

PARAMETER SYMBOL TYP UNIT

Headphone Output

Output Power per Channel Po 20 mW

Signal to Noise Ratio SNR 95 dB

Speaker Output with 8Ω

Ω Ω

Ω bridge tied load

Output Power at 1% TDH Po 400 mW

Abs. Max Output Power Po_max 500 mW

Signal to Noise Ratio SNR 97 dB

On-board Microphone at

F=1kHz, Vs=2.0V

Sensitivity -40 +/-3 dB

S/N Ratio (A) SNR 58 dB

Directivity Omni

Directional

Line Input

Full Scale Input Signal Level Vinfs 1.0 V rms

Input Resistance Rin 17 Kohm