STA308A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STA308A' PDF : 63 Pages View PDF
Registers
STA308A
7.2.40 EGEQ - graphic EQ 8-kHz band (0x27)
7.2.41
D7
D6
D5
D4
D3
D2
D1
D0
EGEQ4
0
EGEQ3
1
EGEQ2
1
EGEQ1
1
EGEQ0
1
11111
11110
11101
…
10000
01111
01110
…
00001
00000
xGEQ[4:0]
Boost / cut
+16
+15
+14
…
+1
0
-1
…
-14
-15
Biquad internal channel loop-through (0x28)
D7
C8BLP
0
D6
C7BLP
0
D5
C6BLP
0
D4
C5BLP
0
D3
C4BLP
0
D2
C3BLP
0
D1
C2BLP
0
D0
C1BLP
0
Each internal processing channel can receive two possible inputs at the input to the biquad
block. The input can come either from the output of that channel’s MIX#1 engine or from the
output of the bass/treble (Biquad#10) of the previous channel. In this scenario, channel 1
receives channel 8. This enables the use of more than 10 biquads on any given channel at
the loss of the number of separate internal processing channels.
Bit RW RST
Name
7:0 RW 0
CnBLP
Description
For n = 1 to 8:
0: input from channel n MIX#1 engine output - normal
operation
1: input from channel (n - 1) biquad #10 output - loop
operation.
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