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| 型號(hào)： | PSD303L |
| 英文描述： | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個(gè)可編程I/O,通用PLD有16個(gè)輸入) |
| 中文描述： | 現(xiàn)場可編程微控制器外圍設(shè)備（可編程邏輯，16K的位的SRAM，19余個(gè)可編程輸入/輸出，通用PLD的有16個(gè)輸入） |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 138K |
| 代理商： | PSD303L |
1-201
Introduction
The 80C51 microcontroller family is composed of several versions from different
manufacturers that are variations of the basic 80C51 architecture. Different functions
on-chip, a variety of speeds, packages, etc. are all available while the 80C51 instruction set
is maintained on all variations. Because of the wide variety of features found with the 80C51
devices, as well as the usefulness of the general architecture itself, the 80C51 product
group has become one of the most widely used microcontroller families in the world. The
purpose of this application note is to provide some background and
implementation ideas to designers using the 80C51 microcontroller family along with the
WSI PSD3XX family. A simple 80C31 system will be examined, as well as more complex
systems where memory map issues become important.
The 80C51 family can be divided into two basic memory usage types: internal memory
usage only (80C51, 8751, etc.) and external memory accesses needed (80C31, 80C51
with external accesses, etc.). The PSD3XX family helps solve the problem of system size
and cost by integrating the typical devices used with external accesses (logic, SRAM,
EPROM, etc.) onto a single chip. Figure 1 illustrates a typical 80C31 system and how it is
dramatically simplified and improved by using a PSD3XX device.
The PSD3XX device simplifies the system by enabling the designer to integrate I/O ports,
the microcontroller to peripherals or memories interface logic, EPROM code storage, and
scratch pad SRAM data storage into a single chip. Design changes that are sometimes
required due to changing market conditions are often easily and quickly implemented in the
reprogrammable PSD3XX without adding extra chips to the system or making board layout
changes.
Figure 1.
Programmable Peripheral
Application Note 022
Using WSI's PSD3XX Programmable
Microcontroller Peripheral Family
with 80C31/80C51 Microcontrollers
By Dan Kinsella
'373
80C31
μC
80C31
μC
ADDRESS
ADDRESS DECODER
DATA
EPROM
SRAM
RD
I/O
I/O
I/O
I/O
I/O
PORT
I/O
PORT
PSEN
PSEN
PLD
RD
CS
A/D
PSD
3XX
80C31 System Before PSD3XX
80C31 System After PSD3XX
Return to Main Menu
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PSD303 | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個(gè)可編程I/O,通用PLD有16個(gè)輸入) |
| PSD311L | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個(gè)可編程I/O,通用PLD有12個(gè)輸入) |
| PSD311 | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個(gè)可編程I/O,通用PLD有12個(gè)輸入) |
| PSD312-15IB | Field-Programmable Peripheral |
| PSD312-20IB | Field-Programmable Peripheral |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PSD303L-15J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD303L-15JI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD303L-15LI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD303L-15LM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD303L-15U | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
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