dp83902a National Semiconductor Corporation, dp83902a Datasheet - Page 2

• Manufacturer Part Number: dp83902a
• Description: St-nictm Serial Network Interface Controller For Twisted Pair
• Manufacturer: National Semiconductor Corporation

General Description
The Media Access Control function which is provided by the
Network Interface Control module (NIC) provides simple
and efficient packet transmission and reception control by
means of unique dual DMA channels and an internal FIFO
Bus arbitration and memory control logic are integrated to
reduce board cost and area overheads
DP83902A provides a comprehensive single chip solution
for 10BASE-T IEEE 802 3 networks and is designed for
easy interface to other transceivers via the AUI interface
Due to the inherent constraints of CMOS processing isola-
tion is required at the AUI differential signal interface for
10BASE5 and 10BASE2 applications Capacitive or induc-
tive isolation may be used
Connection Diagrams
(Continued)
See NS Package Number V84A
Order Number DP83902AV
2
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 AC TIMING TEST CONDITIONS
17 0 PHYSICAL DIMENSIONS
1 0 SYSTEM DIAGRAM
2 0 PIN DESCRIPTION
3 0 BLOCK DIAGRAM
4 0 FUNCTIONAL DESCRIPTION
5 0 TRANSMIT RECEIVE PACKET
6 0 DIRECT MEMORY ACCESS CONTROL (DMA)
7 0 PACKET RECEPTION
8 0 PACKET TRANSMISSION
9 0 REMOTE DMA
ENCAPSULATION DECAPSULATION
Table Of Contents
TL F 11157 – 2