
6.9 Control Registers, Page 9: DAC Digital Filter Coefficients
TSC2117
Low-Power Audio Codec With Embedded miniDSP, Stereo Class-D
Speaker Amplifier, and Smart Four-Wire Touch-Screen Controller
SLAS550A – APRIL 2009 – REVISED JUNE 2009
www.ti.com
Default values shown for this page only become valid 100
s following a hardware or software reset.
Page 9/Register 0: Page Control Register
READ/
RESET
BIT
DESCRIPTION
WRITE
VALUE
D7–D0
R/W
0000 0000
0000 0000: Page 0 selected
0000 0001: Page 1 selected
...
1111 1110: Page 254 selected
1111 1111: Page 255 selected
The remaining page-9 registers are either reserved registers or are used for setting coefficients for the
various filters in the TSC2117. Reserved registers should not be written to.
The filter coefficient registers are arranged in pairs, with two adjacent 8-bit registers containing the 16-bit
coefficient for a single filter. The 16-bit integer contained in the MSB and LSB registers for a coefficient
are interpreted as a 2s-complement integer, with possible values ranging from –32,768 to 32,767. When
programming any coefficient value for a filter, the MSB register should always be written first, immediately
followed by the LSB register. Even if only the MSB or LSB portion of the coefficient changes, both
registers should be written in this sequence.
Table 6-5 is a list of the page-9 registers, excepting the
previously described register 0.
Table 6-5. Page 9 Registers
REGISTER
RESET VALUE
REGISTER NAME
NUMBER
1
XXXX XXXX
Reserved. Do not write to this register.
8 MSBs of n0 coefficient for left DAC-programmable first-order IIR or Coefficient C65(15:8) of
2
0111 1111
DAC miniDSP (DAC Buffer A)
8 LSBs of n0 coefficient for left DAC-programmable first-order IIR or Coefficient C65(7:0) of
3
1111 1111
DAC miniDSP (DAC Buffer A)
8 MSBs of n1 coefficient for left DAC-programmable first-order IIR or Coefficient C66(15:8) of
4
0000 0000
DAC miniDSP (DAC Buffer A)
8 LSBs of n1 coefficient for left DAC-programmable first-order IIR or Coefficient C66(7:0) of
5
0000 0000
DAC miniDSP (DAC Buffer A)
8 MSBs of d1 coefficient for left DAC-programmable first-order IIR or Coefficient C67(15:8) of
6
0000 0000
DAC miniDSP (DAC Buffer A)
8 LSBs of d1 coefficient for left DAC-programmable first-order IIR or Coefficient C67(7:0) of
7
0000 0000
DAC miniDSP (DAC Buffer A)
8 MSBs of n0 coefficient for right DAC-programmable first-order IIR or Coefficient C68(15:8) of
8
0111 1111
DAC miniDSP (DAC Buffer A)
8 LSBs of n0 coefficient for right DAC-programmable first-order IIR or Coefficient C68(7:0) of
9
1111 1111
DAC miniDSP (DAC Buffer A)
8 MSBs of n1 coefficient for right DAC-programmable first-order IIR or Coefficient C69(15:8) of
10
0000 0000
DAC miniDSP (DAC Buffer A)
8 LSBs of n1 coefficient for right DAC-programmable first-order IIR or Coefficient C69(7:0) of
11
0000 0000
DAC miniDSP (DAC Buffer A)
8 MSBs of d1 coefficient for right DAC-programmable first-order IIR or Coefficient C70(15:8) of
12
0000 0000
DAC miniDSP (DAC Buffer A)
8 LSBs of d1 coefficient for right DAC-programmable first-order IIR or Coefficient C70(7:0) of
13
0000 0000
DAC miniDSP (DAC Buffer A)
8 MSBs of n0 coefficient for DRC first-order high-pass filter or Coefficient C71(15:8) of DAC
14
0111 1111
miniDSP (DAC Buffer A)
8 LSBs of n0 coefficient for DRC first-order high-pass filter or Coefficient C71(7:0) of DAC
15
1111 0111
miniDSP (DAC Buffer A)
8 MSBs of n1 coefficient for DRC first-order high-pass filter or Coefficient C72(15:8) of DAC
16
1000 0000
miniDSP (DAC Buffer A)
REGISTER MAP
160