NS32FX164AV-25 National Semiconductor, NS32FX164AV-25 Datasheet - Page 6

• Manufacturer Part Number: NS32FX164AV-25
• Description: IC IMAGING COMM SGNL PROC PLCC68
• Manufacturer: National Semiconductor

Specifications of NS32FX164AV-25

• Processor Type: Advanced Imaging/Communications Signal Processor SIAP™
• Speed: 50MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Other names: *NS32FX164AV-25; Q1284286

1 0 Product Introduction
The NS32FX164 is a high speed CMOS microprocessor in
the Series 32000 EP family
It includes two main execution units the NS32CG16 com-
patible CPU core and the DSP Module The CPU core is
designed for general purpose computations and system
control functions The DSP Module is tuned to perform the
DSP primitives needed in Voice Band Modems
NS32FX164 also incorporates a 4K-byte RAM Array as a
shared resource for both the CPU core and the DSP Module
(2K-byte in the NS32FV16 and the NS32FX161)
The NS32FX164 is software-compatible with all other CPUs
in the family
The device incorporates all of the Series 32000 advanced
architectural features with the exception of the virtual mem-
ory capability
Brief descriptions of the NS32FX164 features that are
shared with other members of the family are provided be-
low
Powerful Addressing Modes Nine addressing modes
available to all instructions are included to access data
structures efficiently
Data Types The architecture provides for numerous data
types such as byte word doubleword and BCD which may
be arranged into a wide variety of data structures
Symmetric Instruction Set While avoiding special case
instructions that compilers can’t use the Series 32000 fami-
ly incorporates powerful instructions for control operations
such as array indexing and external procedure calls which
save considerable space and time for compiled code
Memory-to-Memory Operations The Series 32000 CPUs
represent two-address machines This means that each op-
erand can be referenced by any one of the addressing
modes provided
This powerful memory-to-memory architecture permits
memory locations to be treated as registers for all useful
operations This is important for temporary operands as well
as for context switching
Large Uniform Addressing The NS32FX164 has 24-bit
address pointers that can address up to 16 megabytes with-
out any segmentation this addressing scheme provides
flexible memory management without add-on expense
Modular Software Support Any software package for the
Series 32000 architecture can be developed independent of
all other packages without regard to individual addressing
In addition ROM code is totally relocatable and easy to
access which allows a significant reduction in hardware and
software cost
Software Processor Concept The Series 32000 architec-
ture allows future expansions of the instruction set that can
be executed by special slave processors acting as exten-
The
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sions to the CPU This concept of slave processors is
unique to the Series 32000 architecture It allows software
compatibility even for future components because the slave
hardware is transparent to the software With future ad-
vances in semiconductor technology the slaves can be
physically integrated on the CPU chip itself
To summarize the architectural features cited above pro-
vide three primary performance advantages and character-
istics
1 1 NS32FX164 SPECIAL FEATURES
In addition to the above Series 32000 features the
NS32FX164 provides features that make the device ex-
tremely attractive for a wide range of applications where
graphics support low chip count and low power consump-
tion are required
The most relevant of these features are the enhanced Digi-
tal Signal Processing performance which makes the chip
very attractive for facsimile applications and the graphics
support capabilities that can be used in applications such
as printers CRT terminals and other varieties of display
systems where text and graphics are to be handled
Graphics support is provided by eighteen instructions that
allow operations such as BITBLT data compression expan-
sion fills and line drawing to be performed very efficiently
In addition the device can be easily interfaced to an exter-
nal BITBLT Processing Unit (BPU) for high BITBLT perform-
ance
The NS32FX164 allows systems to be built with a relatively
small amount of random logic The bus is highly optimized
to allow simple interfacing to a large variety of DRAMs and
peripheral devices All the relevant bus access signals and
clock signals are generated on-chip The cycle extension
logic is also incorporated on-chip
The device is fabricated in a low-power high speed CMOS
technology It also includes a power-save feature that al-
lows the clock to be slowed down under software control
thus minimizing the power consumption This feature can be
used in those applications where power saving during peri-
ods of low performance demand is highly desirable
The power save feature the DSP Module and the Bus Char-
acteristics are described in the ‘‘Functional Description’’
section A general overview of BITBLT operations and a
description of the graphics support instructions is provided
in Section 2 5 Details on all the NS32FX164 graphics in-
structions can be found in the NS32CG16 Printer Display
Processor Programmer’s Reference Supplement
High-Level Language Support
Easy Future Growth Path
Application Flexibility