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TFA9812_2 © NXP B.V. 2009. All rights reserved.
Preliminary data sheet Rev. 02 — 22 January 2009 34 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
Fig 9. Equalizer configuration and register location mapping
Left in
Left out
2 × 5 or 2 × 10
Right in
Right out
2 × 5 or 2 × 10
A1
C1
B1
D1 D2 D3 D4 D5
B2 B3 B4 B5
C2 C3 C4 C5
A2 A3 A4 A5
010aaa404
Table 38. Bit description of registers xxh = 04, 06...2A
Bit Symbol Description
15 Eyy_t
1
The filter configuration bit t
1,
see Section 8.5.1.2.
14 to 4 Eyy_k1
m
[10:0] The 11 mantissa bits of the filter parameter k
1,
see
Section 8.5.1.2.
3 to 0 Eyy_k1
e
[3:0] The four exponent bits of the filter parameter k
1
, see
Section 8.5.1.2.
Table 39. Bit description of registers xxh = 05, 07...2B
Bit Symbol Description
15 Eyy_t
2
The filter configuration bit t
2
, see Section 8.5.1.2.
14 to 11 Eyy_k
2m
[3:0] The four mantissa bits of the filter parameter k
2
, see
Section 8.5.1.2.
10 to 8 Eyy_k
2e
[2:0] The three exponent bits of the filter parameter k
2
, see
Section 8.5.1.2.
7 to 1 Eyy_k
0
[6:0] The seven bits of the filter gain parameter k
0
, see
Section 8.5.1.2.
0 Eyy_s The filter scale-factor bits, see
Section 8.5.1.2:
0 = No scaling applied
1 = −6 dB amplification enabled