Cirrus Logic AN335 - Manual (Page 7)

AN335REV1 7
AN335
9. CobraNet SILICON SERIES DEVICE DIFFERENCES
The CS18100, CS18101, CS18102, CS49610, CS49611 and CS49612 are members of the Cirrus Logic CobraNet
®
Silicon Series of devices. They differ from each other based on the presence of a user-programmable audio DSP
core and in the number of audio channels supported. They are otherwise identical devices.
• The package and pinout are the same for all three parts.
• The word clock (FS1) changes from pin 22 to pin 14 for the CS18102 and CS49612. See Figure 2 .
• The bit clock (SCLK) is the same for all parts.
• For all parts, regardless of which pin is used for FS1, DAO1_LRCLK and DAI1_LRCLK should be tied to-
gether.
• The SSI channels run at 128FS (4 channels per SSI) for CS18102/CS49612 and 64FS (2 channels per SSI)
for all other parts.
• Only DAO1_DATA0 and DAI1_DATA0 are active for CS18100/CS49610.
All three lines, DAO1_DATA[3:0] and DAI1_DATA[3:0] are active for all other parts.
• The firmware running on each part is specific to that part.
• The following CobraNet features are only available in CS1810xx-based systems and are not available on
the CS4961xx platform: Audio meters (audioMeter...), loopback (audioLoop...) and duplication (audioDup...)
If required in a CS4961xx-based system, this functionality is easily achieved with DSP Conductor primitives.
9.1 CS18100/CS49610
• One SSI channel is supported allowing input of 2 audio channels and output of 2 audio channels simulta-
neously. This channel runs at 64 FS. See Mode A in
Figure 1 .
• 48-kHz or 96-kHz sample rates are supported.
• DAO1_LRCLK on pin 22 is used for FS1 (word clock). See Figure 2 .
9.2 CS18101/CS49611
• Four SSI channels are supported allowing input of 8 audio channels and output of 8 audio channels simul-
taneously. These channels run at 64 FS. See Mode A in
Figure 1 .
• 48-kHz or 96-kHz sample rates are supported.
• DAO1_LRCLK on pin 22 is used for FS1 (word clock). See Figure 2 .
9.3 CS18102/CS49612
• Four SSI channels are supported allowing input of 16 audio channels and output of 16 audio channels si-
multaneously. These channels run at 128 FS. See Mode B in
Figure 1 .
• 48k-Hz sample rate is supported.
• DAO2_LRCLK on pin 14 is used for FS1 (word clock). See Figure 2 .