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參數(shù)資料
| 型號： | AM79Q062JC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 編解碼器 |
| 英文描述： | A/MU-LAW, PCM CODEC, PQCC32 |
| 封裝： | PLASTIC, LCC-32 |
| 文件頁數(shù)： | 58/95頁 |
| 文件大?。?/td> | 1399K |
| 代理商： | AM79Q062JC |
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SLAC Products
61
See note under Commands 31 and 32.
Note: Z6 is used for IIR filter scaling only. Its value is typically greater than zero but less than or equal to
one. The input to the IIR filter section is first increased by a gain of 1/Z6, improving dynamic range and
avoiding truncation limitations through processing within this filter. The IIR filter output is then multiplied
by Z6 to normalize the overall gain. Z5 is the actual IIR filter gain value defined by the programmed
coefficients, but it also includes the initial 1/Z6 gain. The theoretical effective IIR gain, without the Z6 gain
and normalization, is actually Z5/Z6.
50, 51. Write/Read IIR Z Filter Coefficients (IIR only)
MPI Command
(9A/9Bh)
R/W = 0: Write
R/W = 1: Read
This command writes/reads the IIR filter section only, without affecting the FIR.
The Z-transform equation for the Z filter is defined as:
Sample rate = 32 kHz
For i = 0 to 5 and 7
Power Up and Hardware Reset (RST) Values = 0190 0190 0190 0190 0190 0190 01 0190 (Hex)
(Hz(z) = 0)
See note under Commands 31 and 32.
Note: Z6 is used for IIR filter scaling only. Its value is typically greater than zero but less than or equal to
one. The input to the IIR filter section is first increased by a gain of 1/Z6, improving dynamic range and
avoiding truncation limitations through processing within this filter. The IIR filter output is then multiplied
by Z6 to normalize the overall gain. Z5 is the actual IIR filter gain value defined by the programmed
coefficients, but it also includes the initial 1/Z6 gain. The theoretical effective IIR gain, without the Z6 gain
and normalization, is actually Z5/Z6.
D7
D6
D5
D4
D3
D2
D1
D0
Command
1
0
1
0
1
R/W
I/O Data Byte 11
C45
m45
C35
m35
I/O Data Byte 12
C25
m25
C15
m15
I/O Data Byte 13
C26
m26
C16
m16
I/O Data Byte 14
C47
m47
C37
m37
I/O Data Byte 15
C27
m27
C17
m17
H
z z
() z
0
z
1
z
1
–
z
2
z
2
–
z
3
z
3
–
z
4
z
4
–
z
5
z
6
z
7
z
1
–
1z
7
z
1
–
---------------------------------------
+
++
=
z
i
C1i
2
m1i
–
1C2i
2
m2i
–
1C3i
2
m3i
–
1C4i
2
m4i
–
+
()
+
[]
+
{}
=
z
6
C16
2
m16
–
1C26
2
m26
–
+
{}
=
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