NSBMC290VF NSC [National Semiconductor], NSBMC290VF Datasheet
NSBMC290VF
Related parts for NSBMC290VF
NSBMC290VF Summary of contents
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TM NSBMC290 -16 -20 -25 -33 Burst Mode Memory Controller General Description The NSBMC290 is functionally equivalent V29BMC The NSBMC290 Burst Mode Memory Control- TM ler is a single chip device designed to simplify the imple- mentation of burst mode ...
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... Connection Diagrams PQFP Order Number NSBMC290VF NS Package Number VF132A PGA Bottom View Order Number NSBMC290UP See NS Package Number UP124A 11803 – 11803– 9 ...
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Pin Descriptions PGA Pin QFP Pin Signal A10 ...
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Pin Descriptions Am29000 INTERFACE The following pins have the same function as their counterparts on the Am29000 and are designed to be connected directly to the Am29000 Synchronous Channel Interface Pin A0-31 Address Bus (Input) The address bus transfers byte ...
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Pin Descriptions (Continued) MEMORY INTERFACE The NSBMC290 is designed to drive a memory array orga- nized as 2 banks each of 32 bits The address and control signals for the memory array are output through high current Pin A(A B)0–10 ...
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Functional Description PRODUCT OVERVIEW The NSBMC290 is designed to simplify the interface be- tween the Am29000 high-speed synchronous channel and dynamic memories This integrated circuit responds to all defined instruction and data access modes of the Am29000 and handles all ...
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Functional Description (Continued) BLOCK ADDRESS Once configured a NSBMC290 only responds to addresses within the block address range configured grammed value corresponds to the starting address of the block while the size of the block is determined by the size ...
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Functional Description (Continued) TABLE II Buffer Control Signals and the Memory Bank for Which they are active Simple Pipeline Cycle Signal Name Read DBTX A B DBTXa A DBTXb B DBCE A B DBCEa A DBCEb B IBTX A B ...
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Functional Description (Continued) INTERCONNECT DETAILS The NSBMC290 may be applied in designs where instruc- tion and data memories are separated or in designs where a single memory space is used for both instruction and data In split instruction data designs ...
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Typical Application (Continued) 10 ...
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CPU INTERFACE The NSBMC290 interface to the Am29000 has been de- signed for direct interconnect Normally it is not necessary to place other logic devices between the processor NSBMC290 and memory with the exception of Instruction Data bus buffers The ...
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Typical Application (Continued) FIGURE 4 Burst Read Sequence (Illustrating Burst Suspension) BURST ACCESS SEQUENCE When Burst access has been established the NSBMC290 generates the signal sequence of Figure 5 This access se- quence will continue until either canceled or suspended ...
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Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage ( Input Voltage ( Input Current ...
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Timing Parameters DBTX DBTXa DBTXb DBCE DBCEa DBCEb IBTX IBTXa IBTXb FIGURE 5 Simple Access Timing 11803 – 10 ...
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AC Timing Parameters (Unless otherwise stated V Symbol Description 1 t BlNV Setup BSU 2 t BINV Hold Request Sync Setup Time RQSU 4 t Request Sync Hold Time RQH 5 t Synchronous Input Setup SU 5A ...
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AC Timing Parameters (Continued) TXa IBTXa DBTXa CEa IBCEa DBCE TXb Note Buffer control signal timing is illustrated using the mode dependent signal naming convention (See page shown the switching behavior is typical of ...
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Release Notes for NSBMC290 Revision ‘‘A’’ A NOTE ON THE OPERATION OF THE Am29000 characteristic of the Am29000 (Rev D) that it can de- assert the IBREQ signal independently of the current state of IRDY and IBACK ...
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Ordering Code Information National Semiconductor Mode Burst Mode Controller Processor 290 AMD 29000 Family e NS BMC 290 Frequency 16 MHz 20 MHz 25 MHz 33 MHz Packaging 124-Lead PPGA 132-Lead PQFP ...
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Physical Dimensions inches (millimeters) Pin Grid Array (PGA) Order Number NSBMC290UP NS Package Number UP124A 19 ...
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... National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications Plastic Quad Flatpak (PQFP) Order Number NSBMC290VF NS Package Number VF132A 2 A critical component is any component of a life ...