NS486SXF Datasheet PDF - National
| Part Number | NS486SXF | |
| Description | NS486TMSXF Optimized 32-Bit 486-Class Controller with On-Chip Peripherals for Embedded Systems | |
| Manufacturers | National | |
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There is a preview and NS486SXF download ( pdf file ) link at the bottom of this page. Total 30 Pages | ||
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ADVANCE INFORMATION
February 1997
NS486TMSXF Optimized 32-Bit 486-Class Controller
with On-Chip Peripherals for Embedded Systems
General Description
The NS486SXF is a highly integrated embedded system
controller incorporating an Intel486TM-class 32-bit proces-
sor all of the necessary System Service Elements and a
set of peripheral I O controllers tailored for embedded con-
trol systems It is ideally suited for a wide variety of applica-
tions running in a segmented protect-mode environment
Key Features
Y 100% compatible with VxWorks VRTX QNX Neu-
trino pSOSaTM and other popular real-time executives
and operating system kernels
Y Intel486 instruction set compatible (protected mode
only) with optimized performance
Y CPU includes a 1 Kbyte Instruction Cache
Y Operation at 25 MHz with 5V supply
Y Low cost 160-pin PQFP package
Y Industry standard interrupt controller timers real time
clock UART with IrDA v1 0 (Infrared Data Association)
port
Y Intel 82365 compatible PCMCIA interface
Y Protected WATCHDOGTM timer
Y Optimized DRAM Controller (supports two banks up to
8 Mbytes each)
Y Up to nine versatile programmable chip selects
Y Glueless interface to ISA peripherals
Y Arbitration support for auxiliary processor
Y Four external DMA channels (max transfer rate of 25
MByte sec 25 MHz) support many transfer modes
Y High performance IEEE 1284 (ECP) Bidirectional
Parallel Port
Y MICROWIRETM Access bus synchronous serial
interfaces
Y LCD Controller for an up to 4 grey scale supertwist
Liquid Crystal Displays up to 480 X 320
Y Reconfigurable I O Up to 29 I O pins can be used as
general purpose bidirectional I O lines
Y Flexible programmable multilevel power saving modes
maximize power savings
NS486SXF Single-Chip Embedded Controller
TRI-STATE is a registered trademark of National Semiconductor Corporation
NS486TM WATCHDOGTM and MICROWIRETM are trademarks of National Semiconductor Corporation
Intel486TM is a trademark of Intel Corporation
QNX is a registered trademark of QNX Software Systems Inc
VRTX is a registered trademark of Microtec Research Inc
VxWorks is a registered trademark of Wind River Systems Inc
pSOSaTM is a trademark of Integrated Systems Inc
PowerPack is a registered trademark of Microtek International
C1996 National Semiconductor Corporation TL EE12514
RRD-B30M27 Printed in U S A
TL EE 12514 – 1
http www national com
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1 0 System Overview
1 1 NS486SXF SYSTEM OVERVIEW
The NS486SXF is a highly integrated embedded system
controller It includes an Intel486-class 32-bit processor all
resources required for the System Service Elements of a
Real-Time Executive and a generous set of peripherals
This ‘‘system-on-a-chip’’ is ideal for implementing a wide
variety of embedded applications These include (but are
not limited to) fax machines multifunction peripherals (fax
scanners printers) mobile companions (both organizer and
communicator) television set-top boxes and telephones
(mobile and desktop)
The 32-bit processor core executes all of the Intel486 in-
structions with a similar number of clocks per instruction An
on-board 1 kbyte instruction cache provides for efficient ex-
ecution from ROM Intel486 debug features are supported
The processor has been optimized for operating system
kernels such as VRTX VxWorks pSOSa and QNX These
environments only need the ‘486 protected mode operation
(no real mode or virtual 8086 support) flat or linear memory
addressing (no virtual memory paging) and floating point
execution in software only (no co-processor interface)
In fact the NS486SXF includes all of the System Service
Elements required by a typical kernel including an efficient
DRAM controller that supports page-mode DRAMs for data
cache-like performance a six-channel DMA controller with
two channels supporting data transfers from on-chip periph-
erals (the IEEE 1284 ECP or Extended Capabilities Port
and the LCD controller) and four channels supporting exter-
nal devices such as scanners and print engines three timer
channels (including one configured as a protected WATCH-
DOG Timer) two programmable 8259 interrupt controllers
provide 15 on-chip interrupt sources an industry standard
real time clock and calendar (RTC) with battery backup and
support for comprehensive power management schemes
In addition the NS486SXF also incorporates the key I O
peripherals required for implementing a wide variety of em-
bedded applications an IEEE 1284 Bidirectional Parallel
Port that includes both Host and Slave modes an Intel
82365-compatible PCMCIA controller for one card slot an
industry standard high-performance NS16550-compatible
UART with HP-SIR and IrDA v1 0 infrared option an LCD
panel interface with DMA supported refresh for many of the
standard resolutions an 8254 timer and a general purpose
2- or 3-wire synchronous serial interface for easy interface
to low-cost EEPROMs and other serial peripherals System
expansion is supported with nine programmable Chip Select
(CS) signals and a generic ISA-type bus interface for exter-
nal devices and memory
FIGURE 1-1 NS486SXF Internal Resource to Pins Map
5
TL EE 12514 – 2
http www national com
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for NS486SXF electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ NS486SXF.PDF Datasheet ] | |
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