cs4237b Cirrus Logic, Inc., cs4237b Datasheet - Page 20

• Manufacturer Part Number: cs4237b
• Description: Crystalclear Advanced Audio System With 3d Sound
• Manufacturer: Cirrus Logic, Inc.

The following illustrates typical data sent using
the SLAM method.
If all the above data is sent, after the Crystal key,
all devices except the CDROM and Modem will
respond to the appropriate resources given.
20
NOTE: To enable the PnP/Crystal Keys after
they have been disabled by the SLAM
method, bring the RESDRV pin to a logic
high or remove power from the device.
006h, 001h
015h, 000h
047h, 005h, 034h ; WSSbase = 0x534
048h, 003h, 088h ; SYNbase = 0x388
042h, 002h, 020h ; SBbase = 0x220
022h, 005h
02Ah, 001h
025h, 003h
033h, 001h
015h, 001h
047h, 002h, 000h ; GAMEbase = 0x200
033h, 001h
015h, 002h
047h, 001h, 020h ; CTRLbase = 0x120
033h, 001h
015h, 003h
047h, 003h, 030h ; MPUbase=0x330
022h, 009h
033h, 001h
079h
; CSN=1
; WSS capture DMA1 = 3
; activate logical device 0
; activate logical device 1
; activate logical device 2
; MPU IRQ = 9
; activate logical device 3
; activate Crystal device
; LOGICAL DEVICE 0
; WSS & SB IRQ = 5
; WSS & SB DMA0 = 1
; LOGICAL DEVICE 1
; LOGICAL DEVICE 2
; LOGICAL DEVICE 3
Hardware Configuration Data
The Hardware Configuration data contains map-
ping information that links interrupt and DMA
pins with actual interrupt numbers used by PnP
and SLAM procedures. This data also controls
the XCTL0/XA2 pin functionality. The Hard-
ware Configuration data precedes the PnP
Resource data.
The Hardware Configuration data is either 19 or
23 bytes long and contains the data necessary to
configure the part. If an E
(Hostload), the first four bytes are not needed,
which means the configuration data is only 19
bytes long. The configuration data maps the
many functions of the logical devices to the
physical pins of the chip. Table 2 lists the Hard-
ware Configuration bytes. The detailed bit
descriptions for each byte follows below.
CM2-CM0
HW Config. Byte 5: ACDbase Address Length
Mask, Default = 00000000
D7
res
D6
res
D5
res
Address bit masks for the Alternate
CDROM address decode, ACDbase.
See the CDROM Interface section
for more details on ACDbase
000 - ACDCS low for 1 byte
001 - ACDCS low for 2 bytes
011 - ACDCS low for 4 bytes
111 - ACDCS low for 8 bytes
xxx - all others, RESERVED
D4
res
D3
res
2
PROM is not used
CM2
D2
CS4237B
CM1
D1
DS213PP4
CM0
D0