ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 448 -
Revision 2.4
[3]
DLCOEFF
Move BIQ Out of Reset State
0 = BIQ filter is in reset state.
1 = When this bit is on, the default coefficients will be downloaded to the coefficient
ram automatically in 32 internal system clocks. Processor must delay enough time
before changing the coefficients or turn the BIQ on.
[2]
PATHSEL
AC Path Selection for BIQ
0 = used in SDADC path.
1 = used in DPWM path.
[1]
HPFON
High Pass Filter On
0 = disable high pass filter.
1 = enable high pass filter.
Note :
If this register is on, BIQ only 5 stage left.for user.
SDADC path sixth stage coefficient is for HPF filter coefficient.
DPWM path first stage coefficient is for HPF filter coefficient.
[0]
BIQEN
BIQ Filter Start to Run
0 = BIQ filter is not processing.
1 = BIQ filter is on.