CP2114 datasheet(39/44 Pages) SILABS

39 / 44 page

CP2114

Rev. 1.1

9.2. USB and GPIO Configuration

The global configuration area is used to store USB descriptors and GPIO configuration. If the programmable ROM

has not been programmed, the default configuration data shown in Table 26, Table 27, and Table 28 is used. In

addition, each field in Table 26, Table 27, and Table 28 may only be customized once.

While customization of the USB configuration data is optional, customizing the VID/PID combination is strongly

recommended. A unique VID/PID will prevent the device from being recognized by any other manufacturer’s

software application. A vendor ID can be obtained from www.usb.org or Silicon Labs can provide a free PID for the

OEM product that can be used with the Silicon Labs VID. All CP2114 devices are pre-programmed with a unique

serial number. It is important to have a unique serial if it is possible for multiple CP2114-based devices to be

connected to the same PC.

Table 26. Default USB Configuration Data

Name

Value

Vendor ID

10C4h

Product ID

EAB0h

Power Descriptor (Attributes)

80h (Bus-powered)

Power Descriptor (Max. Power)

32h (100 mA)

Release Number

0100h (Release Version 01.00)

Manufacturer String

“Silicon Laboratories” (62 ASCII characters maximum)

Product Description String

“CP2114 USB-Audio Bridge” (62 characters maximum)

Serial String

Unique 8 character ASCII string (30 characters maximum)

Table 27. Default GPIO Data

Pin Name

Default Function

GPIO.0_RMUTE

Record Mute

GPIO.1_PMUTE

Playback Mute

GPIO.2_VOL-

Volume Down

GPIO.3_VOL+

Volume Up

GPIO.4_RMUTELED

Record Mute LED

GPIO.5_TXT_DACSEL0

DAC Selector 0

GPIO.6_RXT_DACSEL1

DAC Selector 1

GPIO.7_RTS_DACSEL2

DAC Selector 2

GPIO.8_CTS_DACSEL3

DAC Selector 3

GPIO.9_CLKOUT

Clock Output

GPIO.10_TX

UART TX

GPIO.11_RX

UART RX

Table 28. Default UART and Suspend Data

Name

Default Function

Flush Buffers

Flush TX and RX FIFO on open

SUSPEND

Output—Push Pull

SUSPEND

Output—Push Pull

Suspend Latch

0x0000

Suspend Mode

0x0000

Clock Divider

Divide by 1

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