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NM95MS16 Datasheet

  • NM95MS16

  • Plug and Play Front-End Devices for ISA-BUS Systems

  • 10頁

  • FAIRCHILD

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NM95MS16 Plug and Play Front-End Devices for ISA-BUS Systems
July 1998
NM95MS16
Plug and Play Front-End Devices for
ISA-BUS Systems
General Description
The NM95MS16 is the smaller of a family of devices designed to
provide complete Plug and Play Capability for ISA bus systems.
The NM95MS16 includes the necessary state machine logic to
manage the Plug and Play protocol in addition to switches for
steering Interrupt and DMA requests. It also features a built-in 2
kbits of serial EEPROM for storing the resource data specified in
the Plug and Play Standard. In addition, 4 kbits of EEPROM is
available for use by other on-board logic. This device provides a
鈥渢ruly complete鈥?single-chip solution for implementing Plug and
Play on ISA-Bus Adapter cards. The NM95MS16 supports one
logical device with a flexible choice of DMA/IRQ selection and I/O
Chipselect generation as well as offering 16-bit addressing in
Mode 1.
NM95MS16 is implemented using Fairchild鈥檚 Advanced CMOS
process and operates single power supply. The NM95MS16 is
available in a 48-pin TQFP package and 52-pin PLCC package.
Features
s
Complete Implementation of Plug and Play Standard
鈥?Direct interface to ISA bus
s
Two modes of operation
鈥?DMA mode
鈥?Extended Interrupt mode (Windows
廬
95 logo
compatible)
s
6 or 8 ISA bus interrupt lines and 2 DRQ/DACK lines
supported
s
On-chip EEPROM for resource request table
s
Additional 4 kbits of on-chip EEPROM available for external
access
s
24 mA Drivers for Data outputs
s
Complete compliance to ISA PnP specification (Ver. 1.0A)
s
48-Pin TQFP, and 52-Pin PLCC Packages
Block Diagram
Osc.
Rstdrv
From
ISA
Bus
Address
Control
State
Machine
EEPROM
MICROWIRE Port
Decoder
& Control
Register
Block
Data
Buffer
SD<0:7>
ISA
Bus
Address
From
ISA
Bus
Control
DACKx*
LIRQx
LDRQx
Function
Module
Support
Logic
IOCS<0:2>*
LDACKx*
IRQx
DRQx
To
ISA
Bus
DS012601-1
Windows
廬
95 is a registered trademark of Microsoft Corporation.
漏 1998 Fairchild Semiconductor Corporation
1
www.fairchildsemi.com

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