CS4239 Datasheet, PDF (61/98 Pages) Cirrus Logic – CrystalClear™ Portable ISA Audio System

CS4239
CrystalClear^TM Portable ISA Audio System
Version / Chip ID (C1)
Default = 11011110
D7 D6 D5 D4 D3 D2 D1 D0
V2 V1 V0 CID4 CID3 CID2 CID1 CID0
CID4-CID0
V2-V0
Chip Identification. Distinguishes
between this chip and other codec
chips that support this register set.
This register is identical to the WSS
X25 register.
11110 - CS4239
Version number. As enhancements
are made, the version number is
changed so software can distinguish
between the different versions of the
same chip.
100 - Revision A
101 - Revision B
110 - Revision C
3D Space Control (C2)
Default = 0000xxxx
D7 D6 D5 D4 D3 D2 D1 D0
SPC3 SPC2 SPC1 SPC0 rbc rbc rbc rbc
SPC3-SPC0
Space control for 3D sound.
Control’s the "width" of the sound ex-
pansion with increasing numbers
giving decreasing space affects. The
least sigificant bit represents 1.5 dB
of attenuation, with 0000 = 0 dB (full
space affect).
3D Enable (C3)
Default = xxxexxxx
D7 D6 D5 D4 D3 D2 D1 D0
rbc
rbc rbc 3DEN res res res res
3DEN
Enable 3D Sound. When set,
3D sound expansion is enabled on
the analog outputs with the amount
of 3D enhancement controlled
through C2.
Reserved (C4)
Default = xxxxxxxx
D7 D6 D5 D4 D3 D2 D1 D0
rbc
rbc rbc rbc res res res res
rbc
Reserved, backwards compatible.
Reserved (C5)
Default = xxxxxxxx
D7 D6 D5 D4 D3 D2 D1 D0
rbc
rbc rbc rbc rbc rbc rbc rbc
rbc
Reserved, backwards compatible.
Reserved (C6)
Default = xxxxxxxx
D7 D6 D5 D4 D3 D2 D1 D0
rbc
rbc rbc rbc rbc rbc rbc rbc
rbc
Reserved, backwards compatible.
Reserved (C7)
Default = xxxxxxxx
D7 D6 D5 D4 D3 D2 D1 D0
res
res res res res res res res
res
Reserved. Must write 0. Could read
as 0 or 1.
DS253PP2
61