COM20051 View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

COM20051

Integrated Microcontroller and Network Interface with Watchdog Timer and A/D Converter Interface

SMSC -> Microchip 

In addition, the COM20051+ supports an

Emulation Mode that permits the use of a

standard 80C32 emulator in conjunction with the

COM20051+ to develop software drivers for the

network core. This mode is achieved by

mapping the ARCNET network core into a 256-

byte page of the External Data Memory space of

the 80C32 instead of the SFR area, which would

require a costly adapter for the emulator.

The networking core is based around an

ARCNET Token Bus protocol engine that

provides highly-reliable and fault tolerant

message delivery at data rates ranging

from 5Mbps down to 156 Kbps with message

sizes varying from 1 to 508 bytes. The

ARCNET protocol offers a simple, standardized,

and easily-understood networking solution for

any application. The network interface supports

several media interfaces, including RS-485,

coaxial, and twisted pair in either bus or star

topologies. The network interface incorporates

powerful diagnostic features for network

management and fault isolation. These include

duplicate node ID detection, reconfiguration

detection, receive all (monitor) mode, receiver

activity, and token detection.

ARCNET is a registered trademark of Datapoint Corporation

PIN CONFIGURATION

P1.6

P1.7

RESET

N/C

N/C

VCC

N/C

VSS

N/C

P3.0

N/C

nPULSE1

P3.1

P3.2

P3.3

P3.4

P3.5

9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61

10

60

11

59

12

58

13

57

14

56

15

55

16

17

COM20051+

54

53

18

52

19

51

20

50

21

49

22

48

23

47

24

46

25

45

26

44

27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

P0.5

P0.6

P0.7

nEA/EMUL

ADC0

ADC1

ADC2

ADC3

ADC4

ADC5

ADC6

ADC7

TXEN

ALE

nPSEN

P2.7

P2.6

Package: 68-Pin PLCC

3

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