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PCM2902E Datasheet(PDF) 20 Page - Texas Instruments |
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PCM2902E Datasheet(HTML) 20 Page - Texas Instruments |
20 / 32 page PCM2900 PCM2902 SLES035B − MARCH 2002 − REVISED JUNE 2004 www.ti.com 20 USB INTERFACE Control data and audio data are transferred to the PCM2900/2902 via D+ (pin 1) and D– (pin 2). All data to/from the PCM2900/2902 is transferred at full speed. The device descriptor contains the information described in Table 1. The device descriptor can be modified on request; contact a Texas Instruments representative for details. Table 1. Device Descriptor USB revision 1.1 compliant Device class 0x00 (device defined interface level) Device sub class 0x00 (not specified) Device protocol 0x00 (not specified) Max packet size for end-point 0 8 byte Vendor ID 0x08BB (default value, can be modified) Product ID 0x2900 / 0x2902 (default value, can be modified) Device release number 1.0 (0x0100) Number of configurations 1 Vendor strings String #1 (see Table 3) Product strings String #2 (see Table 3) Serial number Not supported The configuration descriptor contains the information described in Table 2. The configuration descriptor can be modified on request; contact a Texas Instruments representative for details. Table 2. Configuration Descriptor Interface Four interfaces Power attribute 0x80 (Bus powered, no remote wakeup) Max power 0x32 (100 mA. Default value, can be modified) The string descriptor contains the information described in Table 3. The string descriptor can be modified on request; contact a Texas Instruments representative for details. Table 3. String Descriptor #0 0x0409 #1 Burr-Brown from TI (default value, can be modified) #2 USB audio codec (default value, can be modified) DEVICE CONFIGURATION Figure 31 illustrates the USB audio function topology. The PCM2900/2902 has four interfaces. Each interface is constructed by alternative settings. |
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