sta381bw STMicroelectronics, sta381bw Datasheet - Page 101

• Manufacturer Part Number: sta381bw
• Description: Sound Terminal 2.1-channel High-efficiency Digital Audio System
• Manufacturer: STMicroelectronics

STA381BW
Direct single-write procedure
1.
2.
Figure 28. Coefficients direct access single-write operation
Direct multi-write procedure
1.
2.
Figure 29. Coefficients direct access multiple-write operation
Direct single-read procedure
1.
2.
Figure 30. Coefficients direct access single-read operation
Please be aware that the STA381BW supports 24-bit coefficients, for this reason in the
above figures Coeff_x(0) is always equal to 0x00 when either reading or writing. The multi-
write procedure embeds a wrap-around mechanism: when trying to write into a location
exceeding the maximum coefficient address, the multi-write procedure will start from
location 0x00.
S
Set reg 0x7E bit 0 to 1 and bit 1 to 0 to enable the direct RAM access in single-write
mode.
Write the coefficient value to the device using an I
discribed in
Set the reg 0x7E bit 0 to 1 and bit 1 to 1 to enable direct RAM access in multi-write
mode.
Write the coefficients value to the device using an I
discribed in
to write the whole RAM contents at once.
Set reg 0x7E bit 0 to 1 and bit 1 to 0 to enable the direct RAM access in multi-write
mode.
Read the coefficient value from the device using an I
discribed in
Slave address
Coeff_0(3)
Coeff_1(3)
Coeff_n(3)
w A
Figure
Figure
Figure
A
A
A
Coeff_0(2)
Coeff_1(2)
Coeff_n(2)
Mem Addr
29. Please note that by using the multi-write procedure, it is possible
28.
30.
Doc ID 018835 Rev 2
A
A
A
A
Coeff_0(1)
Coeff_1(1)
Coeff_n(1)
A
A
A
Coeff_0(0)
Coeff_1(0)
Coeff_n(0)
2
C bus single-write operation as
2
A
A
A
C bus multi-write operation as
2
C bus single-read operation as
Register description: New Map
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