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 

FFFFh

DECODE REGISTER

(FIXED LOCATION)

256 BYTES

64K

BYTES

ARCNET CORE

PAGE

LOCATION CAN

VARY

FIGURE 2 – 8051 EXTERNAL DATA ADDRESS SPACE

NAME BIT O

ADR DEC A8

ADDRESS DECODE REGISTER

BIT 1 BIT 2 BIT 3 BIT 4 BIT 5

A9

A10

A11

A12

A13

BIT 6

A14

BIT 7

A15

LOCATION: FFFFh of the External Data Memory space. Default: 00h

EXAMPLE:

Address Decode Register = 80h

Register X of the ARCNET core will be located at 8000h + Register offset (e.g.

ARCNET Configuration Register offset = 06h, physical address = 8006h).

10

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