NM95MS15 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – Plug and Play Front-End Device for ISA-Bus Systems

November 1996
NM95MS15
Plug and Play Front-End Device for ISA-Bus Systems
General Description
The NM95MS15 is one of the family of single chip solutions
designed to provide complete Plug and Play capability for
ISA bus systems The NM95MS15 includes the necessary
state machine logic to manage the Plug and Play protocol in
addition to switches for steering Interrupt and DMA re-
quests It also features a built-in 4k bits of serial EEPROM
for storing the resource data specified in the Plug and Play
Standard In addition 4k bits of the EEPROM is available for
use by other on-board logic This device provides a truly
complete single-chip solution for implementing Plug and
Play on ISA-Bus adapter cards The NM95MS15 supports
two logical devices with a flexible choice of DMA IRQ selec-
tion I O and MEMORY Chip Select generation
NM95MS15 is implemented using National’s advanced
CMOS process and operates from a single power supply
The NM95MS15 is available in a 64-pin TQFP package
Features
Y _{Single chip implementation of complete Plug and Play}
Standard
Direct interface to ISA-bus
Y _{Three modes of operation}
Normal DMA mode
Extended Interrupt mode
Extended DMA mode
Y _{6 8 or 11 ISA-bus interrupt lines and 3 DRQ DACK}
lines supported (IRQ’s and DRQ’s are mode
dependent)
Y _{On-chip EEPROM for resource request table}
Y _{Additional 4k bits of on-chip EEPROM available for ex-}
ternal access
Y _{24 mA drivers for data outputs}
Y _{64-pin TQFP package}
Block Diagram
C1996 National Semiconductor Corporation TL D 12394
TL D 12394 – 1
RRD-B30M126 Printed in U S A
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