STA333BW STMicroelectronics, STA333BW Datasheet - Page 56
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STA333BW
Manufacturer Part Number
STA333BW
Description
Manufacturer
STMicroelectronics
Datasheet
1.STA333BW.pdf
(67 pages)
Specifications of STA333BW
Operational Class
Class-AB
Audio Amplifier Output Configuration
1-Channel Mono/2-Channel Stereo
Audio Amplifier Function
Speaker
Total Harmonic Distortion
0.2@8Ohm@1W%
Single Supply Voltage (typ)
Not RequiredV
Dual Supply Voltage (typ)
3.3/5/9/12/15/18V
Power Supply Requirement
Quad
Rail/rail I/o Type
No
Power Supply Rejection Ratio
80dB
Single Supply Voltage (min)
Not RequiredV
Single Supply Voltage (max)
Not RequiredV
Dual Supply Voltage (min)
2.7/4.5V
Dual Supply Voltage (max)
3.6/21.5V
Operating Temp Range
-20C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
36
Package Type
PowerSSO EP
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
STA333BW
Manufacturer:
ST
Quantity:
20 000
Part Number:
STA333BW13TR
Manufacturer:
ST
Quantity:
20 000
Part Number:
STA333BWJ13TR
Manufacturer:
ST
Quantity:
20 000
Part Number:
STA333BWTR-9LF
Manufacturer:
ST
Quantity:
20 000
Register description
56/67
Writing a set of coefficients to RAM
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Write bottom 8-bits of coefficient a1 in I
11. Write top 8-bits of coefficient a2 in I
12. Write middle 8-bits of coefficient a2 in I
13. Write bottom 8-bits of coefficient a2 in I
14. Write top 8-bits of coefficient b0 in I
15. Write middle 8-bits of coefficient b0 in I
16. Write bottom 8-bits of coefficient b0 in I
17. 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
STA333BW generates the RAM addresses as offsets from this base value to write the
complete set of coefficient data.
Table 71.
0
1
2
3
4
5
…
19
20
21
…
39
(Decimal)
Index
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
Write middle 8-bits of coefficient a1 in I
RAM block for biquads, mixing, scaling, bass management
0x00
0x01
0x02
0x03
0x04
0x05
…
0x13
0x14
0x15
…
0x27
Index (Hex)
2
Channel 1 - Biquad 1
Channel 1 - Biquad 2
…
Channel 1 - Biquad 4
Channel 2 - Biquad 1
…
Channel 2 - Biquad 4
C address 0x26.
Doc ID 13773 Rev 3
Description
2
2
2
2
2
2
C register 0x16.
C address 0x17.
C address 0x1A.
C address 0x1D.
C address 0x20.
C address 0x23.
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 0x19.
C address 0x1C.
C address 0x1F.
C address 0x22.
C address 0x25.
C1H10(b1/2)
C1H11(b2)
C1H12(a1/2)
C1H13(a2)
C1H14(b0/2)
C1H20
…
C1H44
C2H10
C2H11
…
C2H44
Coefficient
0x000000
0x000000
0x000000
0x000000
0x400000
0x000000
…
0x400000
0x000000
0x000000
…
0x400000
STA333BW
Default