PCM2704CDB.B datasheet(30/53 Pages) TI2

30 / 53 page

PCM2704C, PCM2705C, PCM2706C, PCM2707C

SBFS036B – MAY 2015 – REVISED AUGUST 2015

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10 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

10.1 Application Information

The PSEL allows the device to configure for bus-powered mode (High) or self-powered mode (Low). The HOST

pin configures the maximum current consumption of the device during bus-powered mode (low: 100 mA, high:

500 mA), or can be used as host detector during self-powered mode. The SSPND flag notifies when the USB

input is idle for at least 5 ms; this flag can be used to control or notify subsequent circuits. The device descriptor

can be modified by using an external ROM (PCM2704C/6C) or through the SPI port (PCM2705C/7C); this

descriptor programming function is only available when PSEL and HOST are high. More functional details can be

found in USB Interface.

10.2 Typical Application

10.2.1 Typical Circuit Connection 1: USB Speaker

Figure 35 shows a typical circuit connection for an internal-descriptor, bus-powered, 500-mA application.

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PCM2704CDB.B Datasheet(PDF) 30 Page - Texas Instruments