at89c51re2-slsem ATMEL Corporation, at89c51re2-slsem Datasheet - Page 51

• Manufacturer Part Number: at89c51re2-slsem
• Description: At89c51re2 8-bit Flash Microcontroller
• Manufacturer: ATMEL Corporation

Sharing Instructions
7663B–8051–03/07
Table 27. Instructions shared
Note:
Table 28. Write MOVX @DPTR,A
Table 29. MOVC A, @A+DPTR executed from External code EA=0
Table 30. MOVC A, @A+DPTR executed from External code EA=1, PC>=0x8000,
FBS=Bank3
Action
Read
Write
FMOD2:0
X
by cl : using Column Latch
RAM
MOV
MOV
(Target)
FMOD2:0
MBO
A,@DPTR
@DPTR,A
X
X
XRAM
X
MOVX
MOVX
>= 0x8000
< 0x8000
FCCON
@A+DPTR
FPS of
DPTR
MOVC A,
RM0
0
1
-
(Fetch)
FBS
X
@DPTR,A
CL FM0
Can Returns Random value, for secured part.
MOVX
-
EA
X
1
0
@A+DPTR
MOVC A,
(Target)
MOVC A,@A+DPTR
Depends on FLB2:0
External code read
FM0
by CL
MBO
FM0
X
XRAM
ERAM
winner
winner
@A+DPTR
MOVC A,
MOVC A,@A+DPTR
Read External Code
HSB
by CL
FM0
XAF FM0
CL FM0
@A+DPTR
MOVC A,
winner
by CL
FM0
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