## page was renamed from FIR Filter CSR
= FIR Filter =

 * [[SDB Device ID]] 0x4237dc05
 
Register Map

address space 0x00 - 0xFF

 * 00h - Identification 4237dc05, 32 bits, RO, static

 * 02h - Control, 16 bits, R/W
   . [0] - softreset
   . [14:1] - reserved
   . [15] - enable FIR logic (if disable, then bypass) 

 * 03h - FIR coefficients reload control, 16 bits, R/W
   . [0] - reload control
   . [15:1] - reserved 

 * 04h - Roundoff mode, 16 bits, R/W
   . [ 1:0] - number of bits to truncate
   . [15:2] - reserved 
 * 05h~0Bh - reserved

 * 0Ah - Coefficients reload TLAST missing counter, RO

 * 0Bh - Coefficients reload TLAST unexpected counter, RO

 * 0Ch~0Fh - FIR Filter Buildparams, 64 bits, RO, static
   . [ 7:0] - number of FIR coefficients
   . [15:8] - internal roundoff (FIR drop bits)
   . [63:16] - reserved 
 * 10h~1Fh - reserved

 * 20h~3Fh - List of FIR coefficients, R/W
   . one register per coefficient
    . 20h - 1^st^ coefficient
    . 21h - 2^nd^ coefficient
    . ...
    . 3Fh - 32^nd^ coefficient