M82380 Datasheet, PDF (1/134 Pages) Intel Corporation – HIGH PERFORMANCE 32-BIT DMA CONTROLLER WITH INTEGRATED SYSTEM SUPPORT PERIPHERALS

M82380
HIGH PERFORMANCE 32-BIT DMA CONTROLLER WITH
INTEGRATED SYSTEM SUPPORT PERIPHERALS
Y High Performance 32-Bit DMA
Controller
40 Mbytes sec Maximum Data
Transfer Rate at 20 MHz
8 Independently Programmable
Channels
Y 20-Source Interrupt Controller
Individually Programmable Interrupt
Vectors
15 External 5 Internal Interrupts
M8259A Superset
Y Four 16-Bit Programmable Interval
Timers
M82C54 Compatible
Y Programmable Wait State Generator
0 to 15 Wait States Pipelined
1 to 16 Wait States Non-Pipelined
Y DRAM Refresh Controller
Y i386TM Processor Shutdown Detect and
Reset Control
Software Hardware Reset
Y High Speed CHMOS III Technology
Y 132-Pin PGA Package and 164-Pin Quad
Flat Pack
(See Packaging Specification Order 231369)
Y Optimized for use with the i386TM
Microprocessor
Resides on Local Bus for Maximum
Bus Bandwidth
Y Available in Three Product Grades
MIL-STD-883 ^b55 C to ^a125 C (T_C)
Military Temperature Only
b_{55 C to} a_{125 C (TC)}
Extended Temperature
b_{40 C to} a_{110 C (TC)}
The M82380 is a multi-function support peripheral that integrates system functions necessary in an i386
processor environment It has eight channels of high performance 32-bit DMA with the most efficient transfer
rates possible on the i386 microprocessor bus System support peripherals integrated into the M82380 provide
Interrupt Control Timers Wait State generation DRAM Refresh Control and System Reset logic
The M82380’s DMA Controller can transfer data between devices of different data path widths using a single
channel Each DMA channel operates independently in any of several modes Each channel has a temporary
data storage register for handling non-aligned data without the need for external alignment logic
November 1992
M82380 Internal Block Diagram
271070 – 1
Order Number 271070-006