Operation Cross Memory Access
Space addressable in read and write are:
RAM
ERAM (Expanded RAM access by movx)
•
•
•
•
•
•
•
•
EEPROM DATA
FM0 ( user flash )
Hardware byte
XROW
Boot Flash
Flash Column latch
The table below provides the different kind of memory which can be accessed from dif-
ferent code location.
Table 25. Cross Memory Access
Hardware
Action
Read
Write
Read
Write
RAM
ERAM
Boot FLASH
FM0
OK
E² Data
OK
Byte
OK
OK(1)
OK
-
XROW
OK
-
OK(1)
-
boot FLASH
FM0
-
OK)
-
OK(1)
OK
OK(1)
OK
OK (idle)
OK(1)
OK
Note:
1. RWW: Read While Write
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AT89C5115
4128F–8051–05/06