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DP8390 Datasheet

  • DP8390

  • NIC Network Interface Controller

  • 687.66KB

  • 56頁(yè)

  • NSC

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DP8390D NS32490D NIC Network Interface Controller
July 1995
DP8390D NS32490D NIC Network Interface Controller
General Description
The DP8390D NS32490D Network Interface Controller
(NIC) is a microCMOS VLSI device designed to ease inter-
facing with CSMA CD type local area networks including
Ethernet Thin Ethernet (Cheapernet) and StarLAN The
NIC implements all Media Access Control (MAC) layer func-
tions for transmission and reception of packets in accord-
ance with the IEEE 802 3 Standard Unique dual DMA chan-
nels and an internal FIFO provide a simple yet efficient
packet management design To minimize system parts
count and cost all bus arbitration and memory support logic
are integrated into the NIC
The NIC is the heart of a three chip set that implements the
complete IEEE 802 3 protocol and node electronics as
shown below The others include the DP8391 Serial Net-
work Interface (SNI) and the DP8392 Coaxial Transceiver
Interface (CTI)
Table of Contents
1 0 SYSTEM DIAGRAM
2 0 BLOCK DIAGRAM
3 0 FUNCTIONAL DESCRIPTION
4 0 TRANSMIT RECEIVE PACKET ENCAPSULATION
DECAPSULATION
5 0 PIN DESCRIPTIONS
6 0 DIRECT MEMORY ACCESS CONTROL (DMA)
7 0 PACKET RECEPTION
8 0 PACKET TRANSMISSION
9 0 REMOTE DMA
10 0 INTERNAL REGISTERS
11 0 INITIALIZATION PROCEDURES
12 0 LOOPBACK DIAGNOSTICS
13 0 BUS ARBITRATION AND TIMING
14 0 PRELIMINARY ELECTRICAL CHARACTERISTICS
15 0 SWITCHING CHARACTERISTICS
16 0 PHYSICAL DIMENSIONS
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Compatible with IEEE 802 3 Ethernet II Thin Ethernet
StarLAN
Interfaces with 8- 16- and 32-bit microprocessor
systems
Implements simple versatile buffer management
Requires single 5V supply
Utilizes low power microCMOS process
Includes
Two 16-bit DMA channels
16-byte internal FIFO with programmable threshold
Network statistics storage
Supports physical multicast and broadcast address
filtering
Provides 3 levels of loopback
Utilizes independent system and network clocks
1 0 System Diagram
IEEE 802 3 Compatible Ethernet Thin Ethernet Local Area Network Chip Set
TL F 8582 鈥?1
TRI-STATE is a registered trademark of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL F 8582
RRD-B30M105 Printed in U S A

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