Moteur de recherche de fiches techniques de composants électroniques
Selected language     French  ▼
Nom de la pièce
         Description


AM186ED Datasheet(Fiches technique) 11 Page - Advanced Micro Devices

Numéro de pièce AM186ED
Description  High Performance, 80C186- and 80C188-Compatible, 16-Bit Embedded Microcontrollers
Télécharger  88 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Fabricant  AMD [Advanced Micro Devices]
Site Internet  http://www.amd.com
Logo 

 11 page
background image
Am186ED/EDLV Microcontrollers
11
PRELI M INARY
D
RA
F T
n Enhanced performance—The Am186ED/EDLV
microcontrollers increase the performance of
80C186/188 systems, and the nonmultiplexed ad-
dress bus offers unbuffered access to memory.
n Enhanced functionality—The enhanced on-chip
peripherals of the Am186ED/EDLV microcontrollers
include two asynchronous serial ports, 32 PIOs, a
watchdog timer, additional interrupt pins, a pulse
width demodulation option, DMA directly to and from
the serial ports, 8-bit and 16-bit programmable bus
sizing, a 16-bit reset configuration register, and en-
hanced chip-select functionality.
Application Considerations
The integration enhancements of the Am186ED/EDLV
microcontrollers provide a high-performance, low-sys-
tem-cost solution for 16-bit embedded microcontroller
designs. The nonmultiplexed address bus eliminates
the need for system-support logic to interface memory
devices, while the multiplexed address/data bus main-
tains the value of previously engineered, customer-
specific peripherals and circuits within the upgraded
design.
Figure 1 illustrates an example system design that
uses the integrated peripheral set to achieve high per-
formance with reduced system cost.
Memory Interface
The Am186ED/EDLV microcontrollers integrate a ver-
satile memory controller which supports direct memory
accesses to DRAM, SRAM, Flash, EPROM, and ROM.
No external glue logic is required and all required con-
trol signals are provided. The peripheral chip selects
have been enhanced to allow them to overlap the
DRAM. This allows a small 1.5K portion of the DRAM
memory space to be used for peripherals without bus
contention.
The improved memory timing specifications of the
Am186ED/EDLV microcontrollers allow for zero-wait-
state operation at 40 MHz using 50-ns DRAM, 70-ns
SRAM, or 70-ns Flash memory. For 60-ns DRAM one
wait state is required at 40 MHz and zero wait states at
33 MHz and below. For 70-ns DRAM two wait states
are required at 40 MHz, one wait state at 33 MHz, and
zero wait states at 25 MHz and below. This reduces
overall system cost by enabling the use of commonly
available memory speeds and taking advantage of
DRAM’s lower cost per bit over SRAM.
Figure 1 also shows an implementation of an RS-232
console or modem communications port. The RS-232
to CMOS voltage-level converter is required for the
electrical interface with the external device.
Clock Generation
The integrated clock generation circuitry of the
Am186ED/EDLV microcontrollers enables the use of a
1x crystal frequency. The Am186ED design in Figure 1
achieves 40-MHz CPU operation, while using a 40-
MHz crystal.
Figure 1.
Am186ED Microcontroller Example
System Design
Direct Memory Interface Example
Figure 1 illustrates the direct memory interface of the
Am186ED microcontroller. The processor’s A19–A0
bus connects to the memory address inputs, the AD
bus connects to the data inputs and outputs, and the
chip selects connect to the memory chip-select inputs.
The odd A1–A17 address pins connect to the DRAM
multiplexed address bus.
The RD output connects to the DRAM Output Enable
(OE) pin for read operations. Write operations use the
WR output connected to the DRAM Write Enable (WE)
pin. The UCAS and LCAS pins provide byte selection.
0-6




Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54  55  56  57  58  59  60  61  62  63  64  65  66  67  68  69  70  71  72  73  74  75  76  77  78  79  80  81  82  83  84  85  86  87  88 


Datasheet Download



Numéro de composants électroniques

Numéro de pièceDescription des composantsHtml ViewFabricant
AM188ES-40KCWHigh Performance 80C186-/80C188-Compatible and 80L186-/80L188-Compatible 16-Bit Embedded Microcontrollers 1 2 3 4 5 MoreAdvanced Micro Devices
AM186EMHigh Performance 80C186-/80C188-Compatible and 80L186-/80L188-Compatible 16-Bit Embedded Microcontrollers 1 2 3 4 5 MoreAdvanced Micro Devices
AM186High-Performance 80C186- and 80C188-Compatible 16-Bit Embedded Microcontrollers with RAM 1 2 3 4 5 MoreAdvanced Micro Devices
PIC18F233128/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology High Performance PWM and A/D 1 2 3 4 5 MoreMicrochip Technology
MSM66207OKI ORIGINAL HIGH PERFORMANCE CMOS SINGLE CHIP 8/16-BIT MICROCONTROLLER 1 2 3 4 5 MoreOKI electronic componets
COP8ACC8-Bit CMOS ROM Based and OTP Microcontrollers with 4k or 16k Memory and High Resolution A/D 1 2 3 4 5 MoreNational Semiconductor (TI)
AM29PL320D32 Megabit 2 M x 16-Bit/1 M x 32-Bit CMOS 3.0 Volt-only High Performance Page Mode Flash Memory 1 2 3 4 5 MoreSPANSION
QL301260 000 Usable PLD Gate pASIC3 FPGA Combining High Performance and High Density 1 2 3 4 5 MoreList of Unclassifed Manufacturers
TS80C51RA2High Performance 8-bit Microcontrollers 1 2 3 4 5 MoreATMEL Corporation
QL40099 000 Usable PLD Gate QuickRAM ESP Combining Performance Density and Embedded RAM 1 2 3 4 5 MoreList of Unclassifed Manufacturers

Lien URL

AllDATASHEET vous a-t-il été utile ?   [ DONATE ]  

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Favoris   |   Echange de liens   |   Fabricants
All Rights Reserved © Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl