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T89C51RD2-3CWC-L Datasheet(PDF) 65 Page - ATMEL Corporation

Part # T89C51RD2-3CWC-L
Description  0 to 40MHz Flash Programmable 8-bit Microcontroller
PDF  86 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T89C51RD2-3CWC-L Datasheet(HTML) 65 Page - ATMEL Corporation

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65
Rev. F - 15 February, 2001
T89C51RD2
Mode Name
Mode
Rst
Psen
Ale
__
|_|
EA
P2.6
P2.7
P3.6
P3.7
P0[7..0]
PELCK
Program or Erase Lock.
Disable the Erasure or Programming
access
10
__
|_|
1
1
0
1
0
xx
PEULCK
Program or Erase UnLock.
Enable the Erasure or Programming
access
1
0
Note3
1
1
0
1
0
55-AA
PGMC
Write Code Data (byte)
or write Page
Always precedeed by PGML
10
__
|_|
Internally
timed
1
0
111
xx
PGML
Memory Page Load
(up to 128 bytes)
1
0
Note2
1
0
1
0
1
Din
PGMV
Read Code Data (byte)
1
0
1
1
0
__
|_|
1
1
Dout
VSB
Read Security Byte (=HSB)
1
0
1
1
0
__
|_|
0
1
Dout
PGMS
Write Security Byte (Note 4)
(security byte = HSB)
1
0
10ms
1
1
1
0
0
Din
CERR
Chip Erase User + XAF
1
0
10ms
1
1
0
0
0
xx
PGXC
Write Byte or Page in Extra Memory
(XAF)
Always precedeed by PGXL
10
__
|_|
Internally
timed
1
1
101
xx
PGXL
Memory Page Load XAF
(up to 128 bytes)
1
0
Note2
1
1
1
0
1
Din
TMS
Read Signature bytes
30h (Manufacturer code)
31h (Device ID #1)
60h (Device ID #2)
61h (Device ID #3)
10
1
1
0
__
|_|
0
0
Dout =
58h
D7h
FCh
FFh
RXAF
Read Extra Memory
(XAF)
10
1
1
0
__
|_|
0
0
Dout



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