DP83905AVQB datasheet(2/80 Pages) NSC

2 / 80 page

General Description (Continued)

The integrated ENDEC module allows Manchester encod-

ing and decoding via a differential transceiver and phase

lock Ioop decoder at 10 Mbitsec Also included are a colli-

sion detect translator and diagnostic loopback capability

The ENDEC module interfaces directly to the transceiver

module and also provides a fully IEEE compliant AUI (At-

tachment Unit Interface) for connection to other media

transceivers

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 off-board memory which can be accessed either

through an IO port or mapped into the system memory

ATLANTIC Controller provides a comprehensive solution

for 10BASE-T IEEE 8023 networks Due to the inherent

constraints of CMOS processing isolation is required at the

AUI differential signal interface for 10BASE5 and 10BASE2

applications

Table of Contents

10 SYSTEM DIAGRAM

11 Connection Diagram

20 PIN DESCRIPTION

30 SIMPLIFIED APPLICATION DIAGRAM

40 FUNCTIONAL DESCRIPTION

41 Bus Interface Block

42 Power on RESET operation

43 EEPROM Operation

44 Jumpered and Jumperless Operation Support

45 Low Power Operation

46 Boot PROM Operation

47 DP8390 Core (Network Interface Controller)

48 Twisted Pair Interface Module

49 EncoderDecoder (ENDEC) Module

50 REGISTER DESCRIPTIONS

51 Configuration Registers

52 Shared Memory Mode Control Registers

53 NIC Core Registers

54 DP8390 Core DMA Registers

60 OPERATION OF ATLANTIC CONTROLLER

61 TransmitReceive Packet Encapsulation

Decapsulation

62 Buffer Memory Access Control (DMA)

63 Packet Reception

64 Packet Transmission

65 Loopback Diagnostics

66 Memory Arbitration and Bus Operation

67 Functional Bus Timing

70 PRELIMINARY ELECTRICAL CHARACTERISTICS

80 PRELIMINARY SWITCHING CHARACTERISTICS

90 AC TIMING TEST CONDITIONS

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