sta335bwsqs13tr STMicroelectronics, sta335bwsqs13tr Datasheet - Page 56

• Manufacturer Part Number: sta335bwsqs13tr
• Description: 2.1-channel, High-efficiency Digital Audio System With Qsound Qhd
• Manufacturer: STMicroelectronics

Register description
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9.
10. Read top 8-bits of coefficient a1 in I
11. Read middle 8-bits of coefficient a1 in I
12. Read bottom 8-bits of coefficient a1 in I
13. Read top 8-bits of coefficient a2 in I
14. Read middle 8-bits of coefficient a2 in I
15. Read bottom 8-bits of coefficient a2 in I
16. Read top 8-bits of coefficient b0 in I
17. Read middle 8-bits of coefficient b0 in I
18. Read bottom 8-bits of coefficient b0 in I
Writing a single coefficient to RAM
1.
2.
3.
4.
5.
6.
Writing a set of coefficients to RAM
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Write middle 8-bits of coefficient a1 in I
11. Write bottom 8-bits of coefficient a1 in I
12. Write top 8-bits of coefficient a2 in I
13. Write middle 8-bits of coefficient a2 in I
14. Write bottom 8-bits of coefficient a2 in I
15. Write top 8-bits of coefficient b0 in I
16. Write middle 8-bits of coefficient b0 in I
17. Write bottom 8-bits of coefficient b0 in I
18. Write 1 to WA bit in I
The mechanism for writing a set of coefficients to RAM provides a method of updating the
five coefficients corresponding to a given biquad (filter) simultaneously to avoid possible
unpleasant acoustic side-effects. When using this technique, the 6-bit address specifies the
address of the biquad b1 coefficient (for example, 0, 5, 10, 20, 35 decimal), and the
Read bottom 8-bits of coefficient b2 in I
Select the RAM block with register 0x31 bit1, bit0.
Write 6-bits of address to I
Write top 8-bits of coefficient in I
Write middle 8-bits of coefficient in I
Write bottom 8-bits of coefficient in I
Write 1 to W1 bit in I
Select the RAM block with register 0x31 bit1, bit0.
Write 6-bits of starting address to I
Write top 8-bits of coefficient b1 in I
Write middle 8-bits of coefficient b1 in I
Write bottom 8-bits of coefficient b1 in I
Write top 8-bits of coefficient b2 in I
Write middle 8-bits of coefficient b2 in I
Write bottom 8-bits of coefficient b2 in I
Write top 8-bits of coefficient a1 in I
2
2
C address 0x26.
C address 0x26.
2
C register 0x16.
2
C address 0x17.
2
2
2
2
2
2
2
2
2
C register 0x16.
2
2
C address 0x17.
C address 0x1A.
C address 0x1D.
C address 0x20.
C address 0x23.
C address 0x1D.
C address 0x20.
C address 0x23.
C address 0x18.
C address 0x19.
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
C address 0x18.
C address 0x1B.
C address 0x1E.
C address 0x21.
C address 0x24.
C address 0x1E.
C address 0x21.
C address 0x24.
C address 0x19.
C address 0x1C.
C address 0x1F.
C address 0x22.
C address 0x25.
C address 0x1C.
C address 0x1F.
C address 0x22.
C address 0x25.
STA335BWSQS