DP83907 datasheet(2/70 Pages) NSC

2 / 70 page

General Description (Continued)

The integrated ENDEC module allows Manchester encod-

ing and decoding via a differential transceiver and phase

lock loop 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 through

an IO port

The DP83907 provides a comprehensive solution for

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

straints of CMOS processing isolation is required at the AUI

differential signal interface for 10BASE5 and 10BASE2 ap-

plications

TabIe 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 Jumperless Operation Support

45 Ethernet Cable Configuratlon

46 Interrupt AND LED OperatIon

47 Boot PROM OperatIon

48 DP8390 Core (Network interface Controller)

49 Twisted Pair Interface Module

410 EncoderDecoder (ENDEC) Module

50 REGISTER DESCRIPTIONS

51 Configuration Registers

52 NIC Core Registers

53 DP8390 Core DMA Registers

60 OPERATION OF DP83907

61 TransmitReceive Packet EncapsulationDecapsula-

tion

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 IN-CIRCUIT TEST (ICT) DESCRIPTION

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