MC92500ZQ データシートの表示（PDF） - Motorola => Freescale

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MC92500ZQ

ATM Cell Processor

Motorola => Freescale 

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.

ADD (25:0)

0000000

0010000

0020000

0030000

0030FFF

1000000

2000000

3000000

3FFFFFF

Cell Insertion

Alt. Cell Insertion

Cell Extraction

General Registers

External Address

Compression Device

External Memory

(Non-“Destructive”)

External Memory

(“Destructive”)

Status Reporting

Control Registers

Configuration Registers

Pseudo Registers

Figure 5. MC92500 Processor Memory Map

MOTOROLA

10

MC92500

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