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| 型號： | PSD311 |
| 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12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12個(gè)輸入） |
| 文件頁數(shù)： | 1/7頁 |
| 文件大小： | 37K |
| 代理商： | PSD311 |
Order this document by: AN1237/D
' MOTOROLA INC, 1996
SEMICONDUCTOR
APPLICATION NOTE
MOTOROLA
Using M68HC11 Microcontrollers with
WSI Programmable Peripheral Devices
by Steve Torp - Motorola Semiconductor
Karen Spesard - WSI
INTRODUCTION
Following system development using M68HC711 microcontroller (MCU) devices with EPROM or one time
programmable ROM (OTPROM), a final design is often implemented using an equivalent mask-pro-
grammed M68HC11 device. However, there is a quick, cost-effective alternative to this method of going to
production.
WSI manufactures a complete line of PSD programmable MCU peripherals that make it possible to use a
ROM-less M68HC11 derivative instead of a mask-programmed device. PSD devices combine EPROM,
SRAM, programmable logic for memory map decoding, programmable I/O ports, an address latch, power
management, and other capabilities on a single chip. A “twin chip” solution can increase flexibility, provide
expanded memory and enhanced I/O, lower power consumption, and lower cost — all with a minimum of
software and hardware modifications.
This application note describes the process of converting from a prototype design that uses an M68HC711
device to a production design that uses a low-cost M68HC11 derivative and a WSI PSD.
CONVERSION PROCEDURES
There are eight steps in the conversion process. Each is discussed in detail in the following text.
1. Choose the M68HC11 and PSD
2. Add the PSD to the design
3. Configure the M68HC11 for expanded mode operation
4. Configure the PSD
5. Make memory map and I/O port selections
6. Modify M68HC11 code to address memory and I/O
7. Integrate M68HC11 code with PSD configuration data
8. Program the PSD
CHOOSE THE M68HC11 AND PSD
The M68HC11 family offers a wide range of operating voltage and frequency selections.
M68HC11 Family devices, including M68L11 low-power devices, that can be used in two-chip systems.
EPROM/OTPROM devices are shown in bold. WSI PSDs are available in a variety of configurations. PSDs
provide a larger memory size, I/O port expansion, and programmable logic to an M68HC11 system. Low-
power PSDs are a perfect complement to M68L11 MCUs.
Table 1
shows
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PSD312-15IB | Field-Programmable Peripheral |
| PSD312-20IB | Field-Programmable Peripheral |
| PSD313-90A | Hi-Rel Fixed Voltage Low Dropout 3-Terminal Negative Regulator; Qualified Part Number similar to OM2990-5STM |
| PSD313-90KA | Hi-Rel Fixed Voltage Low Dropout 3-Terminal Negative Regulator; A OM2990-5STM with Standard Packaging |
| PSD312 | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,4位頁寄存器,19個(gè)可編程I/O,通用PLD有16個(gè)輸入) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PSD311-12J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD311-12JI | 制造商:WSI 功能描述: |
| PSD311-12LI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD311-12LM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD311-12Q | 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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