mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 506

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

Communication Processor Module
16.3.4.5 FIR6–COMPLEX C, REAL X, AND COMPLEX Y. The FIR6 function implements
a basic FIR filter with k complex coefficients, real input samples, and complex output. The
input data is in a circular buffer with size M+1 and the output data is in a circular buffer with
size N+1.
16.3.4.5.1 Coefficients and Sample Data Buffers. The coefficients vector occupies k
pairs of 16-bit half-words (real and imaginary components) in memory and C(0) is stored in
the first location. The sample input buffer is a cyclic buffer containing M+1 bytes and each
sample is a 16-bit half-word. The new sample is stored in the address that follows the
previous sample. The output buffer is a cyclic buffer that contains N+1 bytes and the new
output is stored in the address that follows the previous output.
{REAL}
X(N)
Figure 16-20. FIR6 Implementation Example
T
T
T
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{COMPLEX}
C(K-1)
C(0)
MPC823 REFERENCE MANUAL
C(1)
C(2)
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{COMPLEX}
Y(N)
Y n
=
p
k 1
–
=
0
C p X n p
–
MOTOROLA