MC92500 datasheet(10/42 Pages) MOTOROLA

Part #	MC92500

Description	ATM Cell Processor

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Manufacturer	MOTOROLA [Motorola, Inc]

Direct Link	http://www.freescale.com

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MOTOROLA

MC92500

10

Figure 5. MC92500 Processor Memory Map

Control Registers

Configuration Registers

Status Reporting

Pseudo Registers

Alt. Cell Insertion

General Registers

External Memory

(“Destructive”)

External Address

Compression Device

External Memory

(Non-“Destructive”)

0020000

0030FFF

0030000

1000000

2000000

3000000

3FFFFFF

ADD (25:0)

Cell Insertion

Cell Extraction

0000000

0010000

External Address Compression Device - this memory

space may be used by the processor to access the ex-

ternal address compression device. The External

Address Compression Device may be accessed when

the MC92500 is in Setup Mode or during maintenance

slots.

External Memory - this memory space may be used by

the processor to access the External Memory. If the “De-

structive” memory space is used, the MC92500 will au-

tomatically provide a write-back of zeros to each

External Memory location that is read. The External

Memory may be accessed when the MC92500 is in Set-

up Mode or during maintenance slots.

Figure 5 presents the MC92500 memory space addres-

sable by the microprocessor using the MADD bus.

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