Datasheet

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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
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Product Folder Link(s): PCM2912