Communication Processor Module
MOTOROLA MPC823e REFERENCE MANUAL 16-45
DSP
COMMUNICATION
16
PROCESSOR MODULE
16.3.4.2.3 FIR2 Parameter Packet. The FIR2 parameter packet is composed of seven
16-bit half-words and described in the table below.
16.3.4.2.4 Application Example. The FIR2 function is used in the TX and RX filters. For
example, the following function descriptor structure can be used to implement the TX filter.
Table 16-9. FIR2 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 (4 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 is 8 (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 00010
OFFSET + 2
I=3 (THREE ITERATIONS)
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