82C931 Datasheet, PDF (41/64 Pages) List of Unclassifed Manufacturers – Plug and Play Integrated Audio Controller

82C931
Table 5-6 MC Indirect Registers (cont.)
7
6
5
4
3
2
1
0
MCIR14
PNP CSN Register (RO)
Default = 00h
PNP card select number: This registers shows the CSN assigned to the 82C931 by the PNP configuration manager.
MCIR15
PNP Read Port Address Register (RO)
Default = 00h
PNP READ_DATA port: This registers shows the READ_DATA port assigned by the PNP configuration manager.
MCIR16
Reserved
Push-bottom
volume control
interrupt enable
UP bottom is
pushed?
0 = No
1 = Yes
This bit is
cleared after a
read.
Volume Control Register
DOWN bottom
is pushed?
0 = No
1 = Yes
This bit is
cleared after a
read.
Master volume
mute control
(active high)
Push-bottom
volume control
interrupt status
(RO)
This bit is
cleared after a
read.
Default = 00h
Volume control interrupt select:
00 = Disable
01 = IRQ5
10 = IRQ10
11 = IRQ11
MCIR17
Write to exter-
nal serial
EEPROM:
0 = Disable
1 = Enable
External serial
EEPROM chip
select:
0 = Disable
1 = Enable
Serial EEPROM Control Register
External serial
EEPROM
clock:
0 = Disable
1 = Enable
External serial
EEPROM
data out:
0 = Disable
1 = Enable
Connected to
DIN of external
EEPROM
External serial
EEPROM
data out:
0 = Disable
1 = Enable
Connected to
DIN of external
EEPROM
External serial PNP setting
EEPROM
(R/W):
capability (R/W) _Read:
When read for
status:
0 = enabled
1 = disabled
0 = Disable
1 = Enable
Write:
0 = disabled
When write to
change:
0 = Enable
1 = enabled
Note:the polar-
1 = Disable
ity of the read
is the opposite
Note: read
polarity is the
of the write.
opposite of
write’s.
Default = 00h
Reserved
MCIR18
Modem inter-
face capability
(R/W):
When read for
status:
0 = Disable
1 = Enable
When write to
change:
0 = Enable
1 = Disable
Note: read
polarity is the
opposite of
write’s
ASIO function:
0 = Disable
1 = Enable
Reserved
0 = Default
CONFIG Status Register
Mode 0 status
(RO): reflects
931 pin#11 set-
ting.
0 = 931-AD for
adapter
1 = 931-MD for
motherboard
Chip Revision ID (RO)
Silicon rev. 0.1 = 0x8
Silicon rev. 1.1 = 0x9
Default = xxh
912-3000-035
Revision: 2.1
OPTi
®
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