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