mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 525

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

16.3.4.11.4 Application Example. By specifying different values, several functions can be
implemented as shown in the table below.
16.3.4.12 THE DSP EXECUTION TIMES. A function’s execution time is a linear function of
the number of taps and iterations specified for that function. It includes overhead for
context-switch, function descriptor handling, and initialization. Table 16-20 lists the
execution time for each of the DSP functions.
NOTES:
FUNCTION
DEMOD
Table 16-20. DSP Functions Execution Times
WADD
LMS1
LMS2
MOD
FIR1
FIR2
FIR3
FIR5
FIR6
IIR
0
Freescale Semiconductor, Inc.
A
1.
2.
3.
For More Information On This Product,
a
1
1
Add 1 clock for wrap, 5 clocks for stop, and 4 clocks for
interrupt.
i = number of iterations.
k+1 = number of taps.
Table 16-19. WADD Functions
MPC823 REFERENCE MANUAL
1-
Go to: www.freescale.com
-1
B
0
53 + 20
44 + 14
44 + 14
50 + 20
47 + 17
y(n) = x
y(n) = x (n) Scalar Multiply
EXECUTION TIME
42 + 7
42 + 7
( - 1) + 1.25
Linear Interpolation
1
44 + 11
47 + 14
( - 1) + 4
( - 1) + 5
( - 1) + 3
(n) - x
( -1) + 3
44 + 7
46 + 7
FUNCTION
2
(K+1)
(K+1)
(n) Vector Subtract
(K+1)
(K+1)
(K+1)
(K+1)
Communication Processor Module
(K+1)
16-73