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24.5
Flash Memory Characteristics
Table 24.11 lists the flash memory characteristics.
Table 24.11 Flash Memory Characteristics
Condition:
V
CC
V
SS
programming/erasing)
Item
1
2
Programming time*
*
*
1
2
4
Erase time*
*
*
Programming time
1
2
4
(total)*
*
*
1
2
4
Erase time (total)*
*
*
Programming and erase
1
2
4
time (total)*
*
*
Reprogramming count
4
Data retention time*
Notes: 1. Programming and erase time depends on the data.
2. Programming and erase time does not include data transfer time.
3. This value indicates the minimum number of which the flash memory is reprogrammed
with all characteristics guaranteed. (The guaranteed value ranges from 1 to the
minimum number.)
4. This value indicates the characteristics while the flash memory is reprogrammed within
the specified range (including the minimum number).
Rev. 1.00, 09/03, page 692 of 704
= 3.0 V to 3.6 V, AV
= AV
= 0 V, Ta = 0°C to +75°C (operating temperature range for
SS
Symbol Min.
4
t
P
t
E
Σ
tP
Σ
tE
Σ
tPE
3
N
100*
WEC
t
10
DRP
= 3.0 V to 3.6 V, AVref = 3.0 V to AV
CC
Typ.
Max.
Unit
3
30
ms/128 bytes
80
800
ms/4 kbytes
500
5000
ms/32 kbytes
1000
10000
ms/64 kbytes
5
15
s/256 kbytes
5
15
s/256 kbytes
10
30
s/256 kbytes
Times
Years
,
CC
Test Conditions
Ta = 25°C
Ta = 25°C
Ta = 25°C
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