Motorola MPC860 PowerQUICC User Manual page 925

Table 36-9. FIR2 Coefficient, Input, and Output Buffers
CoefÞcients
C(k-1)
36.11.2.2 FIR2 Function Descriptor
The FIR2 function descriptor is shown in Figure 36-12.
0 1
Offset + 0 S Ñ
Offset + 0x2
Offset + 0x4
Offset + 0x6
Offset + 0x8
Offset + 0xA
Offset + 0xC
Offset + 0xE
The status and control bits (at offset 0x00) are described in Table 36-2. The FIR2 parameter
packet consists of seven 16-bit entries, described in Table 36-10.
MOTOROLA
Input Samples
C(0)
C(1)
C(2) imaginary {x(n-k+1)}
* real {x(n-k+1)}
*
imaginary {x(n-2)}
real{x(n-2)}
imaginary{x(n-1)}
real{x(n-1)}
imaginary{x(n)}
2 3 4 5
W I Ñ IALL
Figure 36-12. FIR2 Function Descriptor
Chapter 36. Digital Signal Processing
Part V. The Communications Processor Module
*
*
imaginary{Y(n-k+1)}
*
*
imaginary{Y(n-2)}
imaginary{Y(n-1)}
imaginary{Y(n)}
real{x(n)}
6 7 8 9 10
INDEX PC Ñ Ñ
I
K
CBASE
M
XYPTR
N
Ñ
Output
*
*
real{Y(n-k+1)}
*
*
real{Y(n-2)}
real{Y(n-1)}
real{Y(n)}
11 12 13 14
00010
15
36-11