mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 480

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

Communication Processor Module
16.3.3.1 DATA REPRESENTATION. The inputs, coefficients, and outputs are represented
by 16-bit, fixed-point, 2’s complement numbers. A real number is represented by a single
16-bit half-word, as illustrated in Figure 16-8. Its value is between -1 (0x8000) to +1
(0x7FFF) and you must scale your data to fit this range. A complex number is represented
by a pair of 16-bit half-words—one word for the imaginary component and one for the real
component as shown in Figure 16-8. They must be scaled to fit in the -1 and +1 range.
FIELD
FIELD
FIELD
BIT
BIT
BIT
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0
S
0
S
S
DSP1
DSP2
INPUT, OUTPUT, AND COEFFICIENT
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DUAL-PORT MEMORY
Figure 16-8. DSP Function Descriptor Operation
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RX CHAIN BASE
TX CHAIN BASE
BUFFERS
Freescale Semiconductor, Inc.
For More Information On This Product,
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MPC823 REFERENCE MANUAL
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Go to: www.freescale.com
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IMAGINARY FRACTION
REAL FRACTION
REAL FRACTION
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RECEIVE FD CHAIN
TRANSMIT FD CHAIN
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SYSTEM MEMORY
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MOTOROLA
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