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AN388

Si470X/1X/2X/3X/4X EVALUATION BOARD TEST PROCEDURE

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AN388

2.2.4. FM Tuner and EVB CODEC/SPDIF Settings in Digital Mode

These settings are only applicable to Si4704/05/2x/3x tuners and their EVBs whenever digital audio output is

selected.

2.2.4.1. Si4704/05/2x/3x/4x Standard Configuration in Digital Audio Output Mode

1. Set frequency = 98.1 MHz.

2. Set stereo blend mono threshold = 127.

3. Set AGC override = Off.

4. Set volume = 63.

5. Set de-emphasis = 75 µs.

6. Set soft mute attenuation = 0.

7. Set digital mono mode enable = On.

8. Set digital format = I2S.

9. Set digital sample precision = 24 bit.

10.Set digital sample rate = 48000.

11. Set CODEC precision = 24 bit.

a. Set CODEC output format = I2S.

b. Set CODEC sampling rate = 48 kHz.

c. Set SPDIF output format = I2S.

2.2.4.2. Other Settings in Digital Audio Output Mode

AGC and RDS settings are the same as analog mode.

To set the stereo mode:

1. Set stereo blend mono threshold = 0.

2. Set stereo blend stereo threshold = 0.

3. Set digital mono mode enable = Off.

Rev. 0.2

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