Datasheet

Selecting an Input Source and an Output Port

3-5

Setup Guide

3.5 Selecting an Input Source and an Output Port

The ~IPORT element of switch SW9 is utilized to select the input source.

When ~IPORT is set to LO, the buffered Audio Input Port at connector J1 is

selected as the input source. This port is designed to interface to devices that

support Left Justified, Right Justified, and I

S formatted digital audio data.

When selecting the Audio Input Port as the input source, the IS/~M element

of switch SW7 must be set to match the mode of the SRC419x input port (Mas-

ter or Slave), as described in Section 3.3 of this chapter. The data format of

the external audio device must be set to match the format of the Audio Input

Port.

When ~IPORT is set to HI, connector J2 at the input of the CS8414 digital audio

receiver (U1) is selected as the input source. This port is designed to interface

to digital audio signal generators and devices that output AES3 formatted digi-

tal audio data. This includes the S/PDIF outputs of CD and DVD players.

When selecting the digital audio receiver (U1) as the input source, the IS/~M

element of switch SW7 must be set to LO (Slave mode), and the SRC419x in-

put port must be set to Slave mode, as described in Section 3.3 of this chapter.

The output data format of the digital audio receiver must be selected using

switch SW1 and jumper block J8. The receiver output format must match the

input data format of the SRC419x device, as described in Section 3.4 of this

chapter. Table 3–3 summarizes the configuration of switch SW1 and jumper

block J8 for the supported data formats.

Table 3–3.Digital Audio Receiver Output Data Format Configuration

M2 M1 M0 J8 Data Format

Short 3–4 (LJ)

Short 1–2 (I2S/RJ)

Left Justified, 16– to 24–Bits

Philips I

S, 16– to 24–Bits

Right Justified, 16–Bits

Right Justified, 18–Bits

The ~PORT element of switch SW10 is utilized to select the output port.

When ~PORT is set to LO, the buffered Audio Output Port at connector J3 is

selected as the output port. This port is designed to interface to devices that

support Left Justified, Right Justified, and I

S formatted digital audio data.

When selecting the Audio Output Port as the output port, the OM/~S element

of switch SW9 must be set to match the mode of the SRC419x output port

(Master or Slave), as described in Section 3.3 of this chapter. The data format

of the external audio device must be set to match the format of the Audio Out-

put Port.