Cirrus-logic CRD48L10 Manuel d'utilisateur télécharger pdf (Page 26)

3.2 MCU UI Controlled

The following are menu choices under Clock Source:

• Default 12.288 MHz oscillator

• CLK IN header TP4

• TP4 supports voltages from +1.8 V to +5 V.

• A shunt must be installed on TP30 only when using TP4.

3.2.6 I

C Control Source Menu

An I

C bus is used to configure the CS42L73 codec, S/PDIF Rx, and S/PDIF Tx. By default, the MCU configures all

components on the board for data flow selected. If the user chooses EXT MCU, then the local C8051 releases the I

C bus,

and the external MCU is completely responsible for configuring the board.

Figure 3-28. I

C Control Source Menu

Menu choices under I

C Ctrl Source:

• On-board MCU

• EXT (–SPDIF)—Buffer U23 is tristated by on-board MCU.

• EXT (+SPDIF)—Buffer U23 is enabled by on-board MCU, providing S/PDIF audio to CS48L10.

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Cirrus-logic CRD48L10 Manuel d'utilisateur Page 26