MC68SC302 Passive ISDN Protocol Engine

PublishTime：2021-11-22

●This purpose of this note is to make designers of MC68SC302 based ISA PNP products aware of a problem with the Award Plug and Play BIOS that affects the MC68SC302.
●The Award BIOS Plug and Play Initialization routine does not write to the Interrupt Request Type Select 0 register (address 71) when the Plug and Play resource data is requesting a high edge sensitive interrupt as required by the Plug and Play ISA Specification 1.0a. The MC68SC302 Interrupt Request Type Select 0 has a default of low edge after reset. Since the Award BIOS never programs this register during its Plug and Play initialization sequence the MC68SC302 will issue interrupts low edge sensitive and not be recognized in high edge sensitive systems.

Brand of Product：	NXP
Part#：	MC68SC302 More Part#
Product Category：	Integrated Multi-Protocol Processor More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	March 31, 1997
Version Number：
Data Encoding：	AN2028
Data Size：	88 KB

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