Cirrus Logic CS4360 - Manual (Page 21)

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
s
), 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
S
) 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
S
) 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