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用PLDs(5C032,5C060)设计一个邮箱实现两个80
消耗积分:3 |
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大小:260 |
2009-06-24
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Very often, complex systems involve two or more microcontrollers to fulfill the requirements defined by a given objective. Since the nature of microcontrollers
does not allow for easy dual-port memory design (no``READY'' input; no ``HOLD/HLDA'' interface; portoriented I/O etc.), design engineers are faced with the problem of interchanging information (data and status) between those microcontrollers. This application brief describes the design of a mailbox for exchanging information
between two 80C31s, using a 5C060 PLD as a ``back-to-back'' register, and a 5C032 PLD as an arbitration vehicle to control the actions of the CPUs.
CONTENTS PAGE
INTRODUCTION 1
5C060 MAILBOX 1
5C032 MAILBOX CONTROLLER 2
Block Diagram 3
5C060 ``Back to Back Register'' 4
5C032 ``Mailbox Controller'' 5
5C060 Register ADF 6
5C032 Arbiter ADF 7
does not allow for easy dual-port memory design (no``READY'' input; no ``HOLD/HLDA'' interface; portoriented I/O etc.), design engineers are faced with the problem of interchanging information (data and status) between those microcontrollers. This application brief describes the design of a mailbox for exchanging information
between two 80C31s, using a 5C060 PLD as a ``back-to-back'' register, and a 5C032 PLD as an arbitration vehicle to control the actions of the CPUs.
CONTENTS PAGE
INTRODUCTION 1
5C060 MAILBOX 1
5C032 MAILBOX CONTROLLER 2
Block Diagram 3
5C060 ``Back to Back Register'' 4
5C032 ``Mailbox Controller'' 5
5C060 Register ADF 6
5C032 Arbiter ADF 7
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