STA309A
Registers
Doc ID 13855 Rev 4
57/67
7.2.76 Coefficient
b0
data
register, bits 15:8 (0x4A)
7.2.77 Coefficient
b0
data
register, bits 7:0 (0x4B)
7.2.78 Coefficient
write
control register (0x4C)
Coefficients for EQ and bass management are handled internally in the STA309A via RAM.
Access to this RAM is available to the user via an I
2
C register interface.
A collection of I
2
C registers are dedicated to this function. One contains a coefficient base
address, five sets of three store the values of the 24-bit coefficients to be written or that were
read, and one contains bits used to control the write of the coefficient(s) to RAM. The
following are instructions for reading and writing coefficients.
D7
D6
D5
D4
D3
D2
D1
D0
C5B15
C5B14
C5B13
C5B12
C5B11
C5B10
C5B9
C5B8
0
0
0
0
0
0
0
0
D7
D6
D5
D4
D3
D2
D1
D0
C5B7
C5B6
C5B5
C5B4
C5B3
C5B2
C5B1
C5B0
0
0
0
0
0
0
0
0
D7
D6
D5
D4
D3
D2
D1
D0
Reserved
WA
W1
0
0
0
0
0
0
0
0