AT89C51CC03C-RLTIM 查看數據表（PDF） - Atmel Corporation

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AT89C51CC03C-RLTIM

Enhanced 8-bit MCU with CAN Controller and Flash Memory

Atmel Corporation 

Operation Cross Memory Access

Space addressable in read and write are:

• RAM

• ERAM (Expanded RAM access by movx)

• XRAM (eXternal RAM)

• EEPROM DATA

• FM0 ( user flash )

• Hardware byte

• XROW

• Boot Flash

• Flash Column latch

The table below provide the different kind of memory which can be accessed from differ-

ent code location.

Table 18. Cross Memory Access

Action

RAM

boot FLASH

Read

Write

FM0

Read

Write

External memory

EA = 0

or Code Roll Over

Read

Write

Note: 1. RWW: Read While Write

XRAM

ERAM

Boot FLASH

OK

-

OK

-

-

-

FM0

OK

OK(1)

OK

OK (idle)

-

-

E² Data

OK

OK(1)

OK

OK(1)

OK

OK(1)

Hardware

Byte

OK

OK(1)

OK

-

-

-

XROW

-

OK(1)

-

OK

-

-

56 AT89C51CC03

4182K–CAN–05/06

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