T89C51RD2-3CBC-L ATMEL [ATMEL Corporation], T89C51RD2-3CBC-L Datasheet - Page 65

• Manufacturer Part Number: T89C51RD2-3CBC-L
• Description: 0 to 40MHz Flash Programmable 8-bit Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

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