AT89C51ED2-SMSIM ATMEL Corporation, AT89C51ED2-SMSIM Datasheet - Page 14

• Manufacturer Part Number: AT89C51ED2-SMSIM
• Description: 8-bit Flash Microcontroller
• Manufacturer: ATMEL Corporation

4.3.4 FLASH Characteristics
4.3.4.1 Cell endurance
Purpose:
To evaluate the ability of memory cell to withstand high number of program/erase cycles without change of
electrical characteristics.
Test Parameters:
Measurements have been done on lot 0R5414.
Test done on 2 cells in a byte :
Cycling is done for various programming voltages :
- write :
@5ms
14
-
-
6.5
5.5
4.5
3.5
2.5
-0.5
-1.5
-2.5
cell near byte select transistor, called bit0 (1
cell near Vss contact, called bit 7 (8
7
6
5
4
3
2
-1
-2
0
1
1
13.5V on BL / 15.6V on select - clear : 13.5V on sense / 15.6V on select
14.5V on BL / 16.6V on select @5ms 14.5V on sense / 16.6V on select
15.5V on BL / 17.6V on select
16.5V on BL / 17.6V on select
Vsel=Vsen+2.1 Bit 0 (near byte sel)
Vsel=Vbl+2.1 Bit 0 (near byte sel)
10
10
MP044 0R5414 #01
MP044 0R5414 #01
100
100
# cycles
# cycles
1000
1000
10000
10000
100000
100000
13.5V
14.5V
15.5V
16.5V
13.5V
14.5V
15.5V
16.5V
th
column).
15.5V on sense / 17.6V on select
16.5V on sense / 17.6V on select
st
AT89C51RD2 / AT89C51ED2 QualPack
column)
-0.5
-1.5
-2.5
6.5
5.5
4.5
3.5
2.5
-1
-2
7
6
5
4
3
2
0
1
1
Vsel=Vsen+2.1 Bit 7 (near Vss)
10
10
Vsel=Vbl+2.1 Bit 7 (near Vss)
MP044 0R5414 #01
MP044 0R5414 #01
100
100
# cycles
# cycles
1000
1000
10000
10000
Rev. 0 – 2003 July
100000
100000
13.5V
14.5V
15.5V
16.5V
13.5V
14.5V
15.5V
16.5V