alc203-lf Realtek Semiconductor Corporation, alc203-lf Datasheet - Page 18

• Manufacturer Part Number: alc203-lf
• Description: Two-channel Ac?97 2.3 Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

6.1.17 MX24 Audio interrupt and Paging
Default: 0000h
Two-Channel AC’97 2.3 Audio Codec
10:4
Bit
3:0
15
14
13
12
11
Type
R/W
R/W
R/W
NA
R
R
Interrupt Status, I4
Interrupt event and status are clear by writing a 1 to this bit. The status will change regardless of interrupt
enable (I0).
Interrupt Cause, I3
This bit reflects the cause of the first interrupt event generated. Software should read it after interrupt
status (I4) has been confirmed as interrupting. I3 will be zero when I4 is cleared.
Interrupt Cause, I2
This bit reflects the cause of the first interrupt event generated. Software should read it after interrupt
status (I4) has been confirmed as interrupting. I2 will be zero when I4 is cleared.
Sense Cycle, I1
Writing a ‘1’ to this bit causes a sense cycle start. If a sense cycle is in progress, writing a ‘0’ to this bit will
abort the sense cycle.
Whether the data in the sense result register (page ID-01h MX6A) is valid or not is determined by the IV
bit in MX6A, Page ID-1h.
Interrupt Enable, I0
Reserved, read as 0
Page Selector, PG[3:0]
This register is used to select a descriptor of 16 word pages between registers MX60 to MX6F. Value of 0
is used to select vendor specific space to maintain compatibility with AC’97 2.2 vendor specific register.
Once PG[3:0] is not 0000b and 0001b, ALC203 will return zero data for ACLINK mixer read command.
I3=0: GPIO, SPDIF-IN and Jack-Detect interrupt status in MX78 are not changed.
I3= (MX78.14|MX78.13|MX78.12|MX78.6|MX78.5|MX78.4)
0: Interrupt is clear
1: Interrupt was generated
I2=0: Sense value in page ID-01h MX6A.[12:8] has not changed.
0: Sense cycle not in progress
1: Sense cycle start
0: Interrupt is masked, interrupt status (I4) will not be shown in bit 0 in Slot 12 in SDATA-IN.
1: Interrupt is un-masked, interrupt status (I4) will be shown in bit 0 in Slot 12 in SDATA-IN.
0000b: Vendor Specific
0001b: Page ID 01 (AC’97 2.3 Discovery Descriptor Definition)
Others: Reserved.
1: GPIO, SPDIF-IN and Jack-Detect interrupt status in MX78 are changed.
1: Sense cycle completed or new sense value in page ID-01h MX6A.[12:8] is available.
14
Function
ALC203 DataSheet
Rev1.6