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參數(shù)資料
| 型號(hào)： | STA323WTR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 2.1 HIGH EFFICIENCY DIGITAL AUDIO SYSTEM |
| 中文描述： | 2.1高效率數(shù)字音頻系統(tǒng) |
| 文件頁(yè)數(shù)： | 36/41頁(yè) |
| 文件大?。?/td> | 749K |
| 代理商： | STA323WTR |
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STA323W
36/41
8.10Writing a set of coefficients to RAM
■
write 8-bits of starting address to I
2
C register 16h
■
write top 8-bits of coefficient b1 in I
2
C address 17h
■
write middle 8-bits of coefficient b1 in I
2
C address 18h
■
write bottom 8-bits of coefficient b1 in I
2
C address 19h
■
write top 8-bits of coefficient b2 in I
2
C address 1Ah
■
write middle 8-bits of coefficient b2 in I
2
C address 1Bh
■
write bottom 8-bits of coefficient b2 in I
2
C address 1Ch
■
write top 8-bits of coefficient a1 in I
2
C address 1Dh
■
write middle 8-bits of coefficient a1 in I
2
C address 1Eh
■
write bottom 8-bits of coefficient a1 in I
2
C address 1Fh
■
write top 8-bits of coefficient a2 in I
2
C address 20h
■
write middle 8-bits of coefficient a2 in I
2
C address 21h
■
write bottom 8-bits of coefficient a2 in I
2
C address 22h
■
write top 8-bits of coefficient b0 in I
2
C address 23h
■
write middle 8-bits of coefficient b0 in I
2
C address 24h
■
write bottom 8-bits of coefficient b0 in I
2
C address 25h
■
write 1 to WA bit in I
2
C address 26h
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 8-bit address would specify the address of the biquad b1 coefficient (e.g.
0, 5, 10, 15, …, 45 decimal), and the STA323W will generate the RAM addresses as offsets from this
base value to write the complete set of coefficient data.
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