參數(shù)資料
型號(hào): AT80C51RD2-3CSUM
廠商: International Rectifier
英文描述: High Performance 8-bit Microcontroller
中文描述: 高性能8位微控制器
文件頁(yè)數(shù): 54/85頁(yè)
文件大小: 762K
代理商: AT80C51RD2-3CSUM
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 order to program and verify the EPROM or to read the signature bytes, the
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
0
1
1
0
1
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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