CS4362A_09 Datasheet, PDF (25/50 Pages) Cirrus Logic – 114 dB, 192 kHz 6-Channel D/A Converter

CS4362A
In Software Mode, the required de-emphasis filter coefficients for 32 kHz, 44.1 kHz, or 48 kHz are selected
via the de-emphasis control bits.
In Hardware Mode, only the 44.1 kHz coefficient is available (enabled through the M2 pin). If the input sam-
ple rate is not 44.1 kHz and de-emphasis has been selected, the corner frequencies of the de-emphasis
filter will be scaled by a factor of the actual Fs over 44,100.
Gain
dB
0dB
-10dB
T1=50 µs
T2 = 15 µs
F1
3.183 kHz
F2 Frequency
10.61 kHz
Figure 13. De-Emphasis Curve
4.7 ATAPI Specification
The CS4362A implements the channel mixing functions of the ATAPI CD-ROM specification. The
ATAPI functions are applied per A-B pair. Refer to Table 8 on page 41 and Figure 14 for additional informa-
tion.
Left Channel
Audio Data
A Channel
Volume
Control
MUTE _{Aout Ax}
SDINx
Σ
Σ
Right Channel
Audio Data
B Channel
Volume
Control
MUTE _AoutBx
Figure 14. ATAPI Block Diagram (x = channel pair 1, 2, or 3)
DS617F2
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