NS486SXL-25 National Semiconductor, NS486SXL-25 Datasheet
NS486SXL-25
Specifications of NS486SXL-25
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NS486SXL-25 Summary of contents
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... Operation at 25 MHz with 5V supply Y Low cost 160-pin PQFP package Y Industry standard interrupt controller timers real time Y clock UART with IrDA v1 0 (Infrared Data Association) port NS486SXF Single-Chip Embedded Controller TRI-STATE is a registered trademark of National Semiconductor Corporation NS486 TM WATCHDOG TM MICROWIRE TM and MICROWIRE PLUS Intel486 ...
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SYSTEM OVERVIEW 1 1 NS486SXF System Overview 1 2 32-Bit Processor Core 1 3 System Service Elements DRAM Controller DMA Controller Programmable Interval Timer WATCHDOG Timer ...
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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 ...
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System Overview (Continued) Certain I O lines not being used by disabled peripherals can be reconfigured for use as general purpose bidirectional I O lines ( pins) This gives the designer maximum flexi- bility in designing ...
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System Overview (Continued Interrupt Controller The NS486SXF interrupt controller consists of two cascad- ed programmable interrupt controllers that are compatible with the Intel 8259A Programmable Interrupt Controller They provide a total of 15 (out of ...
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... Special controls permit the fine tuning of display characteristics to precisely optimize visual display quality 1 6 ICE SUPPORT National Semiconductor has worked closely with Microtek International to provide hardware in-circuit emulator support for the NS486SXF The Microtek product (PowerPack EA- NS486) uses a special bondout version of the NS486SXF to ...
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Pin Description Tables Connection Diagram FIGURE 2-1 NS486SXF Package Pinout Diagram The NS486SXF single chip controller is provided in a com- pact 160-pin industry standard JEDEC PQFP package The following tables detail the Symbol Type and Description of ...
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Pin Description Tables Symbol Pins Type System Address bus These output-only signals carry the latched address for the current access DRAM accesses multiplex the row and column addresses for the DRAMs on the ...
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Pin Description Tables Symbol Pins Type RAS Row Address Strobe On the falling edge of these active-low signals Bank 1 and Bank 0 respectively should latch in the row address off ...
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Pin Description Tables TABLE 2-6 Auxiliary Processor Interface Pins Symbol Pins Type EREQ CS6 RTS 1 O This pin has three programmable options controlled by the Modem Signal Control Register (refer to the UART section) 1 External bus ...
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Pin Description Tables Symbol Pins Type RTCX1 1 I Real Time Clock Crystal oscillator input 32 kHz crystal RTCX2 1 O Real Time Clock Crystal oscillator output 32 kHz crystal Vbat 1 I External battery input for real ...
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Pin Description Tables Symbol Pins Type CD RST 1 O CarD ReSeT This active high signal resets the PCMCIA card during a soft-reset IOIS16 port IS 16 bits Write Protect When a PCMCIA card ...
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Pin Description Tables Symbol Pins Type Programmer Timer pin 0 This Bidirectional pin may be selected to control one of the following four functions via bits 1–0 of the Timer I O Control Register ...
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Pin Description Tables TABLE 2-17 General Purpose Chip Select Pins Symbol Pins Type CS0 1 O Chip Select 0 This output is used as the chip select for the system boot ROM If defaults to the upper 64 ...
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... Hong Kong Ltd 49) 0-180-530 85 86 13th Floor Straight Block a Ocean Centre 5 Canton Rd 49) 0-180-530 85 85 Tsimshatsui Kowloon a Tel ( 49) 0-180-532 78 32 Hong Kong a 49) 0-180-532 93 58 Tel (852) 2737-1600 a Tel ( 49) 0-180-534 16 80 Fax (852) 2736-9960 a National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 ...