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Interface #1

Interface #2

PCM2912

SLES216 – FEBRUARY 2008

The Input Terminal #3 is defined as USB stream (terminal type 0x0101). The Input Terminal #3 can accept

2-channel audio streams constructed by Left and Right channels. The Output Terminal #6 is defined as a

speaker (terminal type 0x0301). The Input Terminals #1 and #7 are defined as Microphone (terminal type

0x0201). Physically, these two input terminals are the same input, but logically duplicated. The Output Terminal

#B is defined as a USB stream (terminal type 0x0101). The Output Terminal #B is a single-channel audio stream.

The Mixer Unit #4 mixes up the analog input (sidetone) and the audio data of the DAC. The Mixer Unit #A is

placed in front of the Output Terminal #B. The Mixer Unit #A has no impact on record data. The Mixer Units #4

and #A do not have programming capability.

The Feature Unit #5 supports the following sound control features for analog outputs.

• Volume control

• Mute control

The built-in volume controller can be manipulated by an audio-class-specific request from 0 dB to –76 dB in

steps of 1 dB. An individual (L and R) channel can be set for different values. The built-in mute controller can be

manipulated by an audio-class-specific request. Only a master mute control request is acceptable.

The Feature Unit #2 supports the following sound control features for analog input (sidetone).

• Volume control

• Mute control

The built-in volume controller can be manipulated by an audio-class-specific request from 0 dB to –76 dB in 1-dB

steps. The only master volume control is acceptable. The built-in mute controller can be manipulated by

audio-class-specific request. The only master mute control request is acceptable.

The Feature Unit #8 supports the following sound control features for analog input (microphone record input).

• Volume control

• Mute control

The built-in analog volume controller can be manipulated by an audio-class-specific request from +30 dB to –12

dB in 1-dB steps. The built-in mute controller can be manipulated by an audio-class-specific request. The only

master mute control request is acceptable.

Interface #1 is for audio streaming data-out interface. Interface #1 has the following three alternative settings.

Alternative setting #0 is the zero bandwidth setting. All other alternative settings are operational settings.

ALTERNATIVE

DATA FORMAT

TRANSFER MODE

SAMPLING RATE

SETTING

(kHz)

00

Zero band width

8, 11.025, 16, 22.05, 32, 44.1,

01

16 bit

Stereo

2s complement (PCM)

Adaptive

48

8, 11.025, 16, 22.05, 32, 44.1,

02

16 bit

Mono

2s complement (PCM)

Adaptive

48

Interface #2 is for audio streaming data in interface. Interface #2 has the following two alternative settings.

Alternative setting #0 is the Zero Band Width setting. Alternative setting #1 is an operational setting.

ALTERNATIVE

DATA FORMAT

TRANSFER MODE

SAMPLING RATE (kHz)

SETTING

00

Zero band width

8, 11.025, 16, 22.05, 32,

01

16 bit

Mono

2s complement (PCM)

Asynchronous

44.1, 48

20

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Product Folder Link(s): PCM2912