Embedded Microprocessors. AM386SXLV Datasheet

AM386SXLV Microprocessors. Datasheet pdf. Equivalent


AMD AM386SXLV
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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 low-
cost, high-performance CPUs for embedded applica-
tions. 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 pro-
cessors and the highest performance of any 386SX
available anywhere. The 16-bit data path allows for in-
expensive memory design. Full static operation, cou-
pled 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 fa-
cilitate 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 imple-
ment 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 se-
lection 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 mar-
ket.
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


AM386SXLV Datasheet
Recommendation AM386SXLV Datasheet
Part AM386SXLV
Description Embedded Microprocessors
Feature AM386SXLV; www.DataSheet4U.com FINAL Am386®SX/SXL/SXLV High-Performance, Low-Power, Embedded Microprocessors .
Manufacture AMD
Datasheet
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AMD AM386SXLV
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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
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AMD AM386SXLV
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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
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
Bus Control
HOLD, INTR,
Request NMI, ERROR,
25
Prioritizer
BUSY, RESET,
HLDA, FLT,
SMI*, IIBEN*
Address
Driver
Pipeline/
Bus Size
Control
MUX/
Trans-
ceivers
32
BHE, BLE,
A23-A1
M/IO, D/C,
W/R, LOCK,
ADS, NA,
READY,
SMIADS*,
SMIRDY*
D15-D0
32
FUNCTIONAL DESCRIPTION
True Static Operation
(Am386SXL/SXLV Only)
plifies the design of power-conscious portable applica-
tions in the following ways.
The Am386SXL/SXLV microprocessor incorporates a
true static design. Unlike dynamic circuit design, the
s Eliminates the need for software in BIOS to save
and restore the contents of registers.
Am386SXL/SXLV device eliminates the minimum op-
s Allows simpler circuitry to control stopping of the
erating frequency restriction. It may be clocked from its
clock since the system does not need to know
maximum speed all the way down to 0 MHz (DC). Sys-
the state of the processor.
tem designers can use this feature to design portable
applications with long battery life.
Lower Operating Icc
Standby Mode (Am386SXL/SXLV Only)
(Am386SXL/SXLV Only)
True static design also allows lower operating Icc when
The true static design of the Am386SXL/SXLV micro-
operating at any speed.
processor allows for a Standby Mode. At any operating
mspeed, the microprocessor will retain its state (i.e., the
ocontents of all its registers). By shutting off the clock
.ccompletely, the device enters Standby Mode. Since
Upower consumption is proportional to clock frequency,
t4operating power consumption is reduced as the fre-
equency is lowered. In Standby Mode, typical current
edraw is reduced to less than 20 microamps at DC. Not
honly does this feature save battery life, but it also sim-
Performance on Demand
(Am386SXL/SXLV Only)
The Am386SXL/SXLV microprocessor retains its state
at any speed from 0 MHz (DC) to its maximum operat-
ing speed. With this feature, system designers may
vary the operating speed of the system to extend the
battery life in portable systems.
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