AM79C02AJC datasheet(36/48 Pages) AMD

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Am79C02/03/031(A) Data Sheet

30. Write B Filter Coefficients

(86h)

The Z-transform equation for the B filter is defined as:

The coefficients for the FIR B section and the gain of the IIR B section are defined as:

The feedback coefficient of the IIR B section is defined as:

Warning: Not all B filter coefficients are “valid” to initiate adaptive balance. One valid coefficient is set

as: 2A F2 AF 2A F2 AF 2A F2 AF 2A F2 AF 0A 80, which corresponds to all FIR coefficients

(B0–B7) equal to zero, and the IIR denomination coefficient (B8) equal to 1/2. Other valid

coefficients that may reduce the time to convergence of the algorithm may be obtained by

reading back the registers after adaptive balance has been run (see Command 31).

Command

10000110

Input Data Byte 1

C30

m30

C20

m20

Input Data Byte 2

C10

m10

C31

m31

Input Data Byte 3

C21

m21

C11

m11

Input Data Byte 4

C32

m32

C22

m22

Input Data Byte 5

C12

m12

C33

m33

Input Data Byte 6

C23

m23

C13

m13

Input Data Byte 7

C34

m34

C24

m24

Input Data Byte 8

C14

m14

C35

m35

Input Data Byte 9

C25

m25

C15

m15

Input Data Byte 10

C36

m36

C26

m26

Input Data Byte 11

C16

m16

C37

m37

Input Data Byte 12

C27

m27

C17

m17

Input Data Byte 13

C48

m48

C38

m38

Input Data Byte 14

C28

m28

C18

m18

B z

() B

–

-----------------------

+++

Cli

m1i

–

•

1C2i

m2i

–

1C3i

m3i

–

•

()

•

[]

C18

m18

–

•

1C28

m28

–

1C38

m38

–

•

1C48

m48

–

•

()

[]

•

{}

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