IC89LV52 Datasheet, PDF (12/22 Pages) Integrated Circuit Solution Inc – CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8(4)-Kbytes of FLASH

IC89LV52(51)A
Start
Erase Flow
Start Erase
operation
PLSCNT=0,
Setup Received
Command Mode
(1)
VPP=Vppl,
Setup ’20H’
Command
Erase operation (2)
* 2 pulse
P2.6 set low pulse
for 100 ns
Programming all
data to ’00’ (4)
PLSCNT=0,
Address=00H
Erase operation (2)
Setup ’A0H’
Command
P2.6 set low pulse
for 100 ns
Setup Address
& P2.7 = 0
INC
PLSCNT
No
PLSCNT=50 ?
Read Data
& Set P2.7 = 1
No
Data=’FF’ ?
Yes
Yes
No
Last Address ?
Setup ’D0H’
Command,
VPP=Vpph or
Vppl (5)
PROG set low
pulse for 200 ns
VPP=Vppl
Erase
Completed
Chip Erase Sub-flow
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 erase operation show in "Erase
Operation" Sub-flow
3. To program main memory to '00',
then program lock bits.
The pre-programming address range
are from 0 to 1FFFH either in
IS89LV52A or in IS89LV51A
4. The VPP voltage is decided by
Signature Byte address(032H)
INC
Address
Erase operationx3
Pulse
Yes
Erase
Error
Erase
Completed
Chip Erase Main flow
Figure. 8 IC89LV52(51)A Erase Flow
12
Integrated Circuit Solution Inc.
MC010-0D 11/16/2001