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AM386SXL Dataheets PDF



Part Number AM386SXL
Manufacturers AMD
Logo AMD
Description Embedded Microprocessors
Datasheet AM386SXL DatasheetAM386SXL Datasheet (PDF)

www.DataSheet4U.com FINAL Am386®SX/SXL/SXLV High-Performance, Low-Power, Embedded Microprocessors DISTINCTIVE CHARACTERISTICS s Member of the E86™ CPU series – 16-bit data bus – 24-bit address bus – 16-Mbyte address range – Long-term stable supply from AMD s 40-, 33- and 25-MHz operating speeds s Ideal for embedded applications – True Static design for low-power applications – 3–5 V operation (at 25 MHz) – Ideal for cost-sensitive designs – True DC (0 MHz) operation s Industry Standard Archite.

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www.DataSheet4U.com FINAL Am386®SX/SXL/SXLV High-Performance, Low-Power, Embedded Microprocessors DISTINCTIVE CHARACTERISTICS s Member of the E86™ CPU series – 16-bit data bus – 24-bit address bus – 16-Mbyte address range – Long-term stable supply from AMD s 40-, 33- and 25-MHz operating speeds s Ideal for embedded applications – True Static design for low-power applications – 3–5 V operation (at 25 MHz) – Ideal for cost-sensitive designs – True DC (0 MHz) operation s Industry Standard Architecture – Supports world’s largest software base for x86 architectures – Wide range of chipsets and BIOS available GENERAL DESCRIPTION The Am386®SX/SXL/SXLV microprocessors are lowcost, high-performance CPUs for embedded applications. Embedded customers benefit from using the Am386 microprocessor in a number of ways. The Am386SX/SXL/SXLV microprocessors provide embedded customers access to very inexpensive processors and the highest performance of any 386SX available anywhere. The 16-bit data path allows for inexpensive memory design. Full static operation, coupled with 3-V supplies, benefit customers who desire low-power designs. Standby Mode allows the Am386SXL/SXLV microprocessors to be clocked down to 0 MHz (DC) and retain full register contents. A float pin places all outputs in a three-state mode to facilitate board test and debug. Additionally, the Am386SXLV microprocessor comes mwith System Management Mode (SMM) for system and opower management. SMI (System Management Inter.crupt) is a non-maskable, higher priority interrupt than UNMI and has its own code space (1 Mbyte in Real www.DataSheet4Mode and 16 Mbyte in Protected Mode). SMI can be – Fully compatible with all 386SX systems and software s System Management Mode (SMM) for system and power management (Am386SXLV only) – System Management Interrupt (SMI) for power management independent of processor operating mode and operating system – SMI coupled with I/O instruction break feature provides transparent power off and auto resume of peripherals which may not be “power aware” – SMI is non-maskable and has higher priority than Non-Maskable Interrupt (NMI) – Automatic save and restore of the microprocessor state s 100-lead Plastic Quad Flat Pack (PQFP) package s Extended temperature version available coupled with the I/O instruction break feature to implement transparent power management of peripherals. SMM can be used by system designers to implement system and power management code independent of the operating system or the processor mode. Since the Am386SX/SXL/SXLV microprocessors are supported as an embedded product in the E86 family, customers can rely on long-term supply of product, and extended temperature products. In addition, customers have access to the largest selection of inexpensive development tools, compilers, and chipsets. A large number of PC operating systems and Real Time Operating Systems (RTOS) support the Am386SX/SXL/SXLV microprocessors. This means cheaper development costs, and improved time to market. The Am386SX/SXL/SXLV microprocessor is available in a small footprint 100-pin Plastic Quad Flat Pack (PQFP) package. Publication# 21020 Rev: A Amendment/0 Issue Date: April 1997 www.DataSheet4U.com FINAL ORDERING INFORMATION Standard Products AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of the elements below. I NG 80386 SX –40 SPEED OPTION –40 = 40 MHz –33 = 33 MHz –25 = 25 MHz PROCESSOR TYPE SX = SX Processor SXL = SX Processor with Static Clock Implementation SXLV = SXL Processor with Low-Voltage and SMI PROCESSOR FAMILY Am386 Family PACKAGE TYPE NG=100-Lead Plastic Quad Flat Pack (PQB-100) TEMPERATURE RANGE Blank = Commercial (TCASE = 0°C to +100°C) I = Industrial (TCASE = –40°C to +100°C) Valid Combinations Valid Combinations –25 Valid Combinations lists configurations NG80386 SX –33 planned to be supported in volume for this device. Consult the local AMD sales office –40 to confirm availability of specific valid –25 SXL –33 combinations and to check on newly released combinations. SXLV omING80386 SX –25 –25 www.DataSheet4U.c2 Am386SX/SXL/SXLV Microprocessors Data Sheet www.DataSheet4U.com BLOCK DIAGRAM FINAL Effective Address Bus Effective Address Bus Protection Test Unit Segmentation Unit Paging Unit 3-Input Adder 32 Adder Descriptor 32 Page 32 Registers Cache Limit and Attribute PLA Control and Attribute PLA Displacement Bus Linear Address Bus Internal Control Bus Barrel Shifter, Adder Multiply/ Divide Status Flags Register File ALU Control Decode and Sequencing Control ROM Control ALU * – On Am386SXLV only Instruction Decoder Prefetcher/ Limit Checker Code 3-Decoded Stream Instruction Queue 32 Bit 16-Byte Code Queue Instruction Predecode Instruction Prefetch Dedicated ALU Bus Code Fetch/Page Table Fetch Bus Control HOL.


LMH6526 AM386SXL AM386SXLV


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