TS87C51RD2 ATMEL Corporation, TS87C51RD2 Datasheet - Page 54

• Manufacturer Part Number: TS87C51RD2
• Description: (TS8xC51Rx2) High Performance 8-bit Microcontroller
• Manufacturer: ATMEL Corporation

9.2.3
9.3
9.3.1
9.3.2
54
EPROM Programming
AT/TS8xC51Rx2
Signature bytes
Set-up Modes
Definition of Terms
WARNING: Security level 2 and 3 should only be programmed after EPROM and Core
verification.
The TS87C51RB2/RC2/RD2 contains 4 factory programmed signatures bytes. To read these
bytes, perform the process described in Section “Signature bytes”.
I n o r d e r t o p r o g r a m a n d v e r if y t h e E P R O M o r t o r e a d t h e s ig n a t u r e b y t e s , t h 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.
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.
Program Code data
Verify Code data
Program Encryption
Array Address 0-3Fh
Read Signature Bytes
Program Lock bit 1
Program Lock bit 2
Program Lock bit 3
EPROM Set-Up Modes
Mode
RST
1
1
1
1
1
1
1
PSEN
0
0
0
0
0
0
0
ALE/P
ROG
1
1
12.75V
12.75V
12.75V
12.75V
12.75V
EA/VP
P
1
1
P2.6
0
0
0
0
1
1
1
P2.7
1
1
1
1
0
P3.3
1
0
1
0
1
1
1
4188E–8051–08/06
P3.6
1
1
0
0
1
0
1
P3.7
1
1
1
0
1
0
0