Motorola MPC823e Reference Manual page 522

Communication Processor Module
16.3.4.10.1 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. Each
sample is a pair of 16-bit half-words (real and imaginary components) and the new sample
is stored in the address that follows the previous sample.
Figure 16-31. LMS2 Coefficients and Sample Data Buffers
16.3.4.10.2 LMS2 Function Descriptor. The LMS2 function descriptor bit table is
described below.
0 1 2
S RES W
OFFSET + 0
OFFSET + 2
OFFSET + 4
OFFSET + 6
OFFSET + 8
OFFSET + A
OFFSET + C
OFFSET + E
16-68
COEFFICIENTS
imag{C(0)}
real{C(0)}
imag{C(1)}
real{C(1)}
*
*
imag{C(k-1)}
real{C(k-1)}
2K bytes
3 4 5 6 7
I Z RES INDEX
RESERVED
CBASE
XPTR
EPTR
RESERVED
MPC823e REFERENCE MANUAL
INPUT SAMPLES
*
*
*
imag{X(n-k+1)}
real{X(n-k+1)}
*
*
imag{X(n-2)}
real{X(n-2)}
imag{X(n-1)}
real{X(n-1)}
imag{X(n)}
real{X(n)}
M + 1 bytes
8 9 10 11
RES
K
M
12 13 14 15
OPCODE
MOTOROLA