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NS32FX16-25 Datasheet

  • NS32FX16-25

  • Imaging/Signal Processor

  • 88頁

  • NSC

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NS32FX16-15 NS32FX16-20 NS32FX16-25 Imaging Signal Processor
PRELIMINARY
July 1991
NS32FX16-15 NS32FX16-20 NS32FX16-25
Imaging Signal Processor
General Description
The NS32FX16 is a high-performance 32-bit member of the
Series 32000 EP
TM
family of National鈥檚 Embedded System
Processors
TM
specifically optimized for CCITT Group 2 and
Group 3 Facsimile Applications Data Modems Voice Mail
Systems Laser Printers or any combination of the above
It can perform all the computations and control functions
required for a stand-alone Fax system a PC add-in Fax
Data Modem card or a Laser Fax system
It also meets the performance requirements to implement
9600 and 7200 bps modems complying with CCITT V 29
and V 27 standards
The NS32FX16 provides a 16 Mbyte Linear external ad-
dress space and a 16-bit external data bus
The CPU core which is the same as that of the NS32CG16
incorporates a 32-bit ALU and instruction pipeline and an
8-byte prefetch queue
Also integrated on-chip with the CPU are a DSP Module and
a 384-byte RAM Array The DSP Module executes vector
operations on complex variables and is specially designed
to enhance performance in modem applications The vector
operations can also be used to efficiently implement FIR
Filters and other DSP primitives The on-chip RAM Array is
used to store the coefficients of the various filters and can
be accessed by both the CPU and the DSP Module
The NS32FX16 capabilities can be expanded by using an
external floating point unit (FPU) which directly interfaces to
the NS32FX16 using the slave protocol The CPU-FPU clus-
ter features high speed execution of the floating-point in-
structions
The NS32FX16 highly-efficient architecture combined with
the NS32CG16 graphics instructions and the high-perform-
ance vector operation capability makes the device the ideal
choice for Postscript
TM
and Fax applications
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Software compatible with the Series 32000 EP
processors
Designed around the CPU core of the NS32CG16
32-bit architecture and implementation
On-chip DSP Module for high-speed DSP operations
Special support for graphics applications
18 graphics instructions
Binary compression expansion capability for font
storage using RLL encoding
Pattern magnification
Interface to an external BITBLT processing units for
fast color BITBLT operations
384-byte on-chip RAM array
On-chip clock generator
Floating-point support via the NS32081 or NS32181
Optimal interface to large memory arrays via the
NS32CG821 and the DP84xx family of DRAM control-
lers
Power save mode
High-speed CMOS technology
68-pin PLCC package
Block Diagram
TL EE 10818 鈥?67
Series 32000 is a registered trademark of National Semiconductor Corporation
EP
TM
and Embedded System Processors
TM
are trademarks of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL EE10818
RRD-B30M115 Printed in U S A

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