Ameba-D User Manual
User Manual All information provided in this document is subject to legal disclaimers. © REALTEK 2019. All rights reserved.
352
17.6.2.20
0x21
Address
Bit
Name
Access
Reset
Description
0x21
[4:0]
ALC_RC_FAST_RATE
R/W
5'h4
ALC fast recovery time
recovery time = (4 * 2^n)/48k, n = alc_rc_fast_rate[4:0]
5'h00: 83us
5'h01: 166us
5'h02: 332us
...
5'h12: 21.85s
[9:5]
ALC_RC_SLOW_RATE R/W
5'h0C
ALC fast recovery time
recovery time = (4 * 2^n)/48k, n = alc_rc_slow_rate[4:0]
5'h00: 83us
5'h01: 166us
5'h02: 332us
...
5'h12: 21.85s
[15:10]
ALC_THMAX
R/W
6'h0
ALC main-limiter threshold level (at amplitude domain) control
6'h00: 0dB
6'h01: -0.375dB
6'h02: -0.750dB
...
6'h3f: -23.625dB (-0.375dB/step)
17.6.2.21
0x22
Address
Bit
Name
Access
Reset
Description
0x22
[7:0]
ALC_RC_WD_MAX R/W
8'h74
Set upper bound of fast recovery window
8'h01: 5.33ms
8'h02: 10.67ms
...
8'hff: 1360ms
[15:8]
ALC_RC_WD_MIN
R/W
8'h18
Set lower bound of fast recovery window
8'h01: 2.67ms
8'h02: 5.33ms
...
8'hff: 680ms
17.6.2.22
0x23
Address
Bit
Name
Access
Reset Description
0x23
[1:0]
ALC_THFULL
R/W
2'h0
ALC full scale threshold level (at amplitude domain) control
2'b00: 0dBFs
2'b01: -0.5dBFs
2'b10: -1.0dBFs
2'b11: -1.5dBFs
[7:2]
ALC_THMAX2
R/W
6'h0
ALC second-limiter threshold level (at amplitude domain) control
6'h00: 0dB
6'h01: -0.75dB
6'h02: -1.5dB
...
6'h3c: -45dB (-0.75dB/step)
[12:8]
ALC_THNOISE R/W
5'h0
AGC noise gate threshold level (at amplitude domain) control
5'h00: -24.00dB
5'h01: -25.50dB
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2019-05-15 10:08:03