8.3. EPROM Programming
TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
8.3.1. 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 18.).
Control and program signals must be held at the levels indicated in Table 30.
8.3.2. 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 30. EPROM Set-Up Modes
Mode
RST
PSEN
ALE/
PROG
EA/VPP
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
Rev. C - 06 March, 2001
53