IC89LV52 Datasheet, PDF (11/22 Pages) Integrated Circuit Solution Inc – CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8(4)-Kbytes of FLASH

IC89LV52(51)A
Start
Programming
PLSCNT=0,
Setup Received
Command Mode
(1)
Setup ’60H’(’70H’
,’80H’)Command
P2.6 set low pulse
for 100 ns
Setup ’D0H’
Command
VPP=Vpph
or Vppl(2)
PROG set low
pulse for 100 ns
VPP=Vppl
No
PLSCNT=10?
Yes
Programming
Completed
1. Received Command Mode status:
RST=1, PSEN=0, PROG=1, VPP=1, P2.6=1, P2.7=1, P3.6=1, P3.7=1
2. The VPP voltage is decided by Signature Byte address(032H)
Figure. 7 IC89LV52(51)A Lock Bits Programming Flow
Integrated Circuit Solution Inc.
11
MC010-0D 11/16/2001