User Manual

CS4360

DS517F2 21

4. APPLICATIONS

4.1 Sample Rate Range/Operational Mode Select

4.1.1 Stand-Alone Mode

The device operates in one of four operational modes determined by the Mode pins in Stand-alone mode.

Sample rates outside the specified range for each mode are not supported.

4.1.2 Control Port Mode

The device operates in one of three operational modes determined by the FM bits (see section 6.1.4) in

Control Port mode. Sample rates outside the specified range for each mode are not supported.

4.2 System Clocking

The device requires external generation of the master (MCLK), left/right (LRCK) and serial (SCLK) clocks.

The LRCK, defined also as the input sample rate (F

), must be synchronously derived from the MCLK

according to specified ratios. The specified ratios of MCLK to LRCK, along with several standard audio

sample rates and the required MCLK frequency, are illustrated in Tables 3-5.

Sample Rate

(kHz)

MCLK (MHz)

256x 384x 512x 768x 1024x*

32 8.1920 12.2880 16.3840 24.5760 32.7680

44.1 11.2896 16.9344 22.5792 33.8688 45.1584

48 12.2880 18.4320 24.5760 36.8640 49.1520

Table 3. Single-speed Mode Standard Frequencies

Sample Rate

(kHz)

MCLK (MHz)

128x 192x 256x 384x 512x*

64 8.1920 12.2880 16.3840 24.5760 32.7680

88.2 11.2896 16.9344 22.5792 33.8688 45.1584

96 12.2880 18.4320 24.5760 36.8640 49.1520

Table 4. Double-speed Mode Standard Frequencies

M2 M1 Input Sample Rate (F

)MODE

0 0 4 kHz - 50 kHz Single-Speed (without De-emphasis)

0 1 32 kHz - 48 kHz Single-Speed (with De-emphasis)

1 0 50 kHz - 100 kHz Double-Speed

1 1 100 kHz - 200 kHz Quad-Speed

Table 1. CS4360 Stand-Alone Operational Mode

FM1 FM0 Input Sample Rate (F

)MODE

0 0 4 kHz - 50 kHz Single-speed

0 1 50 kHz - 100 kHz Double-speed

1 0 100 kHz - 200 kHz Quad-speed

1 1 Reserved Reserved

Table 2. CS4360 Control Port Operational Mode