alc250-lf Realtek Semiconductor Corporation, alc250-lf Datasheet - Page 31

• Manufacturer Part Number: alc250-lf
• Description: Two-channel Ac?97 2.3 Audio Codec With Equalizer
• Manufacturer: Realtek Semiconductor Corporation

6.5.18 Index-12h EQ Band-6 Coefficient (High Pass Filter, HP6: a1)
Default: 0000h
6.5.19 Index-13h EQ Band-6 Coefficient (High Pass Filter, HP6: a2)
Default: 0000h
6.5.20 Index-20h EQ Control & Status Register
Default: 0000h
Two-Channel AC’97 2.3 Audio Codec
Write to EQ coefficient-{a1,a1,Ho} will be ignored when specific control bit is enabled, it means modify individual EQ
coefficients is forbidden when EQ is working.
15:0
15:1
Bit
Bit
Bit
15
14
13
12
11
10
0
9
8
7
6
5
4
3
2
1
0
Type
Type
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
NA
R
R
R
R
R
R
R
The EQ function is planned to compensate frequency response for mini speaker, it should be bypassed
16-bit 2’s complement coefficient. Range= -2 ~ 1.99
Reserved
Digital Process Engine Output Control
EQ Band-6 Control. 0: Disable
EQ Band-5 Control. 0: Disable
EQ Band-4 Control. 0: Disable
EQ Band-3 Control. 0: Disable
EQ Band-2 Control. 0: Disable
EQ Band-1 Control. 0: Disable
EQ Band-0 Control. 0: Disable
Bypass Digital EQ Control by JDx
when headphone jack is plugged to be output device.
EQ Band-6 Status. 0: Normal
This bit is set if overflow had ever occurred. Write 1 to clear it.
EQ Band-5 Status. 0: Normal
This bit is set if overflow had ever occurred. Write 1 to clear it.
EQ Band-4 Status. 0: Normal
This bit is set if overflow had ever occurred. Write 1 to clear it.
EQ Band-3 Status. 0: Normal
This bit is set if overflow had ever occurred. Write 1 to clear it.
EQ Band-2 Status. 0: Normal
This bit is set if overflow had ever occurred. Write 1 to clear it.
EQ Band-1 Status. 0: Normal
This bit is set if overflow had ever occurred. Write 1 to clear it.
EQ Band-0 Status. 0: Normal
This bit is set if overflow had ever occurred. Write 1 to clear it.
0: 20dB/decade slope
0: Bypass digital EQ (Default)
1: Digital EQ output.
1: Bypass digital EQ by H/W when MX7A.1=1
0:Normal, bypass EQ control is decided by EQ Control&Status register Index-20h.15 (Default)
1: 40dB/decade slope (2 cascaded HP6)
1: Overflow.
1: Overflow.
1: Overflow.
1: Overflow.
1: Overflow.
1: Overflow.
1: Overflow.
1: Enable.
1: Enable.
1: Enable.
1: Enable.
1: Enable.
1: Enable.
1: Enable.
26
Function
Function
Function
ALC250 DataSheet
Rev1.3