Communication Processor Module
MOTOROLA MPC823e REFERENCE MANUAL 16-49
DSP
COMMUNICATION
16
PROCESSOR MODULE
16.3.4.3.3 FIR3 Parameter Packet. The FIR3 parameter packet is composed of seven
16-bit half-words and described in the table below.
16.3.4.3.4 Application Example. The FIR3 with the real output is used in echo
cancellation and the one with the complex output is used in the equalizer.
Table 16-10. FIR3 Parameter Packet
ADDRESS NAME DESCRIPTION
Half-word 1 I Number of Iterations
Half-word 2 K Number of TAPs-1
Half-word 3 CBASE Filter Coefficients Vector Base Address Pointer
Half-word 4 M Samples Buffer Size-1. The minimum sample buffer size is 8 (2 samples).
Half-word 5 XYPTR Pointer to a structure composed of the input sample data pointer and the output
buffer pointer
Half-word 6 N Output Buffer Size-1. The minimum output buffer size for x=1 is 8 (2 outputs). The
minimum output buffer size for x=0 is 4 (2 outputs).
Half-word 7 RES Reserved
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
OFFSET + 0
S 0 W I 0 0 01 0 0 0 00011
OFFSET + 2
I=3 (THREE ITERATIONS)
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