CS4351(2004) Просмотр технического описания (PDF) - Cirrus Logic

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CS4351
(Rev.:2004)

192 kHz Stereo DAC with 2 Vrms Line Out

Cirrus Logic 

CS4351

4. APPLICATIONS

4.1 Sample Rate Range/Operational Mode Detect

The device operates in one of three operational modes. The allowed sample rate range in each mode will

depend on whether the Auto-Detect Defeat bit is enabled/disabled.

4.1.1 Auto-Detect Enabled

The Auto-Detect feature is enabled by default. In this state, the CS4351 will auto-detect the correct

mode when the input sample rate (Fs), defined by the LRCK frequency, falls within one of the rang-

es illustrated in Table 2. Sample rates outside the specified range for each mode are not supported.

Input Sample Rate (FS)

4 kHz - 50 kHz

84 kHz - 100 kHz

170 kHz - 200 kHz

MODE

Single Speed Mode

Double Speed Mode

Quad Speed Mode

Table 2. CS4351 Auto-Detect

4.1.2 Auto-Detect Disabled

The Auto-Detect feature can be defeated only by the format bits in the control port register 02h. In

this state, the CS4351 will not auto-detect the correct mode based on the input sample rate (Fs). The

operational mode must then be set manually according to one of the ranges illustrated in Table 3.

Please refer to section 6.2.3 for implementation details. Sample rates outside the specified range

for each mode are not supported. In stand-alone mode it is not possible to disable auto-detect of

sample rates.

FM1

0

0

1

1

FM0

0

1

0

1

Input Sample Rate (FS)

Auto speed mode detect

4 kHz - 50 kHz

50 kHz - 100 kHz

100 kHz - 200 kHz

MODE

Auto

Single Speed Mode

Double Speed Mode

Quad Speed Mode

Table 3. CS4351 Mode Select

16

DS566PP2

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