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AT80C51RA2-RLSIV 数据表(PDF) 54 Page - International Rectifier

部件名 AT80C51RA2-RLSIV
功能描述  High Performance 8-bit Microcontroller
PDF  85 Pages
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制造商  IRF [International Rectifier]
网页  http://www.irf.com
标志 IRF - International Rectifier

AT80C51RA2-RLSIV 数据表(HTML) 54 Page - International Rectifier

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54
4188E–8051–08/06
AT/TS8xC51Rx2
WARNING: Security level 2 and 3 should only be programmed after EPROM and Core
verification.
9.2.3
Signature bytes
The TS87C51RB2/RC2/RD2 contains 4 factory programmed signatures bytes. To read these
bytes, perform the process described in Section “Signature bytes”.
9.3
EPROM Programming
9.3.1
Set-up Modes
In o r d e r to p r o g r a m a n d ve r i fy th e EPR O M o r to r e a d th e si g n a tu r e b y te s, th e
TS87C51RB2/RC2/RD2 is placed in specific set-up modes (See Figure 9-1.).
Control and program signals must be held at the levels indicated in Table 9-2.
9.3.2
Definition of Terms
Address Lines:P1.0-P1.7, P2.0-P2.5, P3.4, P3.5 respectively for A0-A15 (P2.5 (A13) for RB,
P3.4 (A14) for RC, P3.5 (A15) for RD)
Data Lines:P0.0-P0.7 for D0-D7
Control Signals:RST, PSEN, P2.6, P2.7, P3.3, P3.6, P3.7.
Program Signals:ALE/PROG, EA/VPP.
Table 9-2.
EPROM Set-Up Modes
Mode
RST
PSEN
ALE/P
ROG
EA/VP
P
P2.6
P2.7
P3.3
P3.6
P3.7
Program Code data
1
0
12.75V
0
1
1
1
1
Verify Code data
1
0
1
1
0
0
1
1
Program Encryption
Array Address 0-3Fh
1
0
12.75V
011
01
Read Signature Bytes
1
0
1
1
0
0
0
0
Program Lock bit 1
1
0
12.75V
1
1
1
1
1
Program Lock bit 2
1
0
12.75V
1
1
1
0
0
Program Lock bit 3
1
0
12.75V
1
0
1
1
0



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