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EKA8562A Datasheet(PDF) 10 Page - ELAN Microelectronics Corp |
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EKA8562A Datasheet(HTML) 10 Page - ELAN Microelectronics Corp |
10 / 18 page EKA8562A USB Audio Controller 6 • Product Specification (V0.1) 04.24.2006 (This specification is subject to change without further notice) 7 Function Description The eKA8562A is a USB Audio Controller that transmits/receives audio data stream to/from the host through its Audio Streaming interface. The Audio Data Format supports 16-bit, 2-channel, and 48kHz PCM. It has three interfaces. Interface 1 supports three sampling frequencies. The sampling rate is changed when “Set Endpoint Control Request” is issued. If user plays other format audio data, the application software transforms it to 48kHz data and then transmit to this device. For Interface 2, this device transmits data at a rate that is locked to frame timing. When user use the recording format (ex. 8kHz) to record speech other than 48kHz stereo format, the application software transforms 48kHz data to 8kHz data. Interface 3 is HID pipe which is used to read button status. The volume and mute control can be activated via host (audio device class requests) or via I/O pins (HID plus audio device class requests). When this function is activated via host, the host manages the audio PCM data directly. The eKA8562A device just playback the audio data. Otherwise, when it is activated via I/O pins, the eKA8562A sends the controlled feature (Key code) message through HID pipe and signals the host to manage the audio PCM data and control the Skype phone directly. 8 Absolute Maximum Rating Symbol Min Max Unit Temperature under bias 0 70 ºC Storage temperature -65 150 ºC Input voltage -0.5 6.0 V Output voltage -0.5 6.0 V |
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