sta323wqs STMicroelectronics, sta323wqs Datasheet - Page 64

• Manufacturer Part Number: sta323wqs
• Description: 2.1-channel High-efficiency Digital Audio System With Qsound Qhd??
• Manufacturer: STMicroelectronics

User-programmable settings
8.6.17
8.7
8.8
64/72
Coefficient write control register (address 0x26)
Coefficients for EQ, Mix and Scaling are handled internally in the STA323WQS via RAM.
Access to this RAM is available to the user via an I
registers are dedicated to this function. The first register contains base address of the
coefficient: five sets of three registers store the values of the 24-bit coefficients to be written
or that were read, and one contains bits used to control the reading or writing of the
coefficients to RAM. The following are instructions for reading and writing coefficients.
Reading a coefficient from RAM
1.
2.
3.
4.
5.
Reading a set of coefficients from RAM
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Read middle 8-bits of coefficient a1 in I
11. Read bottom 8-bits of coefficient a1 in I
12. Read top 8-bits of coefficient a2 in I
13. Read middle 8-bits of coefficient a2 in I
14. Read bottom 8-bits of coefficient a2 in I
15. Read top 8-bits of coefficient b0 in I
16. Read middle 8-bits of coefficient b0 in I
17. Read bottom 8-bits of coefficient b0 in I
D7
Write 8-bits of address to I
Write ‘1’ to bit R1 (D2) of I
Read top 8-bits of coefficient in I
Read middle 8-bits of coefficient in I
Read bottom 8-bits of coefficient in I
Write 8-bits of address to I
Write ‘1’ to bit RA (D3) of I
Read top 8-bits of coefficient in I
Read middle 8-bits of coefficient in I
Read bottom 8-bits of coefficient in I
Read top 8-bits of coefficient b2 in I
Read middle 8-bits of coefficient b2 in I
Read bottom 8-bits of coefficient b2 in I
Read top 8-bits of coefficient a1 in I
D6
D5
2
2
2
2
C register 0x26.
C register 0x26.
C register 0x16.
C register 0x16.
2
2
C address 0x17.
C address 0x17.
D4
2
2
2
2
2
2
2
2
C address 0x1A.
C address 0x1D.
C address 0x20.
C address 0x23.
C address 0x18.
C address 0x18.
C address 0x19.
C address 0x19.
2
2
2
2
2
2
2
2
C address 0x1B.
C address 0x1E.
C address 0x21.
C address 0x24.
C address 0x1C.
C address 0x1F.
C address 0x22.
C address 0x25.
RA
D3
2
0
C register interface. A collection of I
D2
R1
0
WA
D1
0
STA323WQS
W1
D0
0
2
C