STA309A13TR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STA309A13TR Datasheet PDF : 67 Pages
| |||
STA309A
Registers
7.2.41
7.2.42
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.
Table 67. CnBLP bits
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.
Mix internal channel loop-through (0x29)
D7
C8MXLP
0
D6
C7MXLP
0
D5
C6MXLP
0
D4
C5MXLP
0
D3
C4MXLP
0
D2
C3MXLP
0
D1
C2MXLP
0
D0
C1MXLP
0
Each internal processing channel can receive two possible sets of inputs at the inputs to the
Mix#1 block. The inputs can come from the outputs of the interpolation block as normally
occurs (CnMXLP = 0) or they can come from the outputs of the Mix#2 block. This enables
the use of additional filtering after the second mix block at the expense of losing this
processing capability on the channel.
Table 68. CnMXLP bits
Bit RW RST
Name
7:0 RW 0
CnMXLP
Description
For n = 1 to 8:
0: inputs to channel n MIX#1 engine from interpolation
outputs - normal operation
1: inputs to channel n MIX#1 engine from MIX#2 engine
outputs - loop operation.
Doc ID 13855 Rev 4
45/67
Share Link: 