MC68302 datasheet(46/480 Pages) MOTOROLA

Part #	MC68302

Description	Integrated Multiprotocol Processor User?셲 Manual

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Manufacturer	MOTOROLA [Motorola, Inc]

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MC68000/MC68008 Core

2-16

MC68302 USER’S MANUAL

MOTOROLA

# Modiﬁed by the CP after a CP or system reset.

## Tx BD 4, 5, 6, and 7 are not initially available to SCC3. (See 4.5.5 Buffer Descriptors Table for

information on how they may be regained.)

In addition to the internal dual-port RAM, a number of internal registers support the functions

of the various M68000 core peripherals. The internal registers (see Table 2-9) are memory-

mapped registers offset from the BAR point1616er and are located on the internal M68000

bus.

Base + 580

•

Base + 5BF

SCC2

Specific Protocol Parameters

Base + 5C0

•

Base + 5FF

Reserved

(Not Implemented)

Base + 600

Base + 608

Base + 610

Base + 618

Base + 620

Base + 628

Base + 630

Base + 638

Base + 640

Base + 648

Base + 650

Base + 658

Base + 660

Base + 666

Base + 668

Base + 66A

Base + 66C

Base + 66E #

Base +67A

Base +67C

Base +67E #

4 Word

3 Word

Word

6 Word

Word

SCC3

SMC

SCC1

SCC2

SMC1–SMC2

SCP

SCC1–SCC3

CP

RxBD0

RxBD1

RxBD2

RxBD3

RxBD4

RxBD5

RxBD6

RxBD7

TxBD0

TxBD1

TxBD2

TxBD3 ##

Reserved

RxBD

TxBD

RxBD

TxBD

Internal Use

Rx/TxBD

BERR Channel Number

MC68302 Revision Number

Base + 680

•

Base + 6BF

SCC3

Specific Protocol Parameters

Base + 6C0

•

Base + 7FF

Reserved

(Not Implemented)

Table 2-8. Parameter RAM

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