IC89C54/58/64

Integrated Circuit Solution Inc.

21

MC009-0B

Figure 16. Programming Timing

P3[7:6]

P2[7:6]

P3.5

VPP

P3[3:2]

P2[5:0]

P1[7:0]

PROG

P0[7-0]

P3.4(BUSY)

Valid Data

1. 0EH is for code memory programming. In lock bits programming, 0FH, 03H, 05H, respect to lock bits

1, 2, 3.

2. 0CH is for code memory verification and 0DH is for concurrent memory verification. 09H is for Lock

bits verification.

3. Address don’t care while lock bits’ programming or verification.

4. Data don’t care while lock bits’ programming.