Rainbow Electronics AT89LV55 - Manual (Page 15)

AT89LV55
15
Flash Programming Modes
Note: 1. Chip Erase requires a 10 ms PROG pulse.
Mode RST PSEN ALE/PROG EA/V
PP
P2.6 P2.7 P3.6 P3.7
Write Code Data H L 12V L H H H
Read Code Data H L H H L L H H
Write Lock Bit-1 H L 12V H H H H
Bit-2 H L 12V H H L L
Bit-3 H L 12V H L H L
Chip Erase H L 12V H L L L
Read Signature Byte H L H H L L L L
(1)