t89c51rd2-slscl ATMEL Corporation, t89c51rd2-slscl Datasheet - Page 79

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t89c51rd2-slscl

Manufacturer Part Number
t89c51rd2-slscl
Description
0 To 40 Mhz Flash Programmable 8-bit Microcontroller
Manufacturer
ATMEL Corporation
Datasheet
Figure 32. Programming and Verification Signal’s Waveform
Extra Memory Mapping
4243G–8051–05/03
D0-D7
ALE/PROG
P2.7
Control signals
A0-A15
EA
5V
0V
The memory mapping the T89C51RD2 software registers in the Extra Flash memory is
described in the table below.
Table 42. Extra Row Memory Mapping (XAF)
All other addresses are reserved
Software Security Byte (level 1 by
Copy of HSB (level 4 by default
Copy of Manufacturer Code:
Programming Cycle
Software Boot Vector
Copy of device ID #3
Copy of device ID #2
Copy of device ID #1
Boot Status Byte
and BLJB = 0)
Data In
ATMEL
default)
48 clk (load latch ) or 10 ms (write) or 100 ms (erase)
Address
Read/Verify Cycle
0061h
0060h
0031h
0030h
0005h
0004h
0001h
0000h
Data Out
T89C51RD2
Default content
18h or 1Bh
FCh
D7h
FCh
FFh
FFh
FFh
58h
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