CS4237B Datasheet, PDF (18/114 Pages) Cirrus Logic – CrystalClear Advanced Audio System with 3D Sound

CS4237B
sor. The RAM allows updates to the core proces-
sor functionality. Placing the firmware patches
in E²PROM, gives the maximum functionality at
power-up without the need for a software driver.
The firmware patch data is typically included at
the end of the PnP resource data. Crystal pro-
vides a utility that will read in patch data from a
file, and append it to the PnP resource data. The
patch file must be obtained from Crystal.
The Crystal Key
NOTE: The Crystal Key cannot differentiate be-
tween multiple Crystal Codecs in a system;
therefore, ONLY ONE Crystal part is allowed in
systems using the Crystal Key. To allow multiple
parts in a system, the Plug-and-Play isolation se-
quence must be used since it supports multiple
parts via the serial identifier used in the isolation
sequence.
Physical Device Logical Device Best Choice
WSS
16-bit address
decode
high true
edge sensitive
8-bit, count by
byte, type A
same
Synthesis
16-bit address
decode
SB Pro
16-bit address
decode
Game Port
16-bit address
decode
Control
16-bit address
decode
MPU401
16-bit address
decode
0
WSSbase
Length/Alignment
IRQ
DMA
DMA
0
SYNbase
Length/Alignment
IRQ
0
SBbase
Length/Alignment
1
GAMEbase
Length/Alignment
2
CTRLbase
Length/Alignment
IRQ
3
MPUbase
Length/Alignment
IRQ
534h-534h
4/4
5
(SB share)
1
(SB share)
0, 3
388h
4/8
----
220h
16/16
200h
8/8
120-3F8h
8/8
----
330h
2/8
9
Acceptable
Choice 1
534-608h
4/D4h
5,7,9,11,12,15
(SB share)
0, 3
(SB share)
0, 1, 3
Sub optimal Sub optimal
Choice 1
Choice 2
ANSI ID = WSS/SB
534-FFCh
4/4
5, 7, 9, 11, 12, 15
(SB share)
0, 1, 3
(SB share)
----
388h
4/8
----
388-3F8h
4/8
----
220-260h
16/32
208h
8/8
220-300h
16/32
ANSI ID = GAME
ANSI ID = CTRL
330-360h
2/8
9,11,12,15
ANSI ID = MPU
330-3E0h
2/8
----
---- Feature not supported in the listed configuration, but is supported through customization.
Table 1. Typical Motherboard Plug-and-Play Resource Data
18
DS213PP4