CHAPTER 20 ELECTRICAL SPECIFICATIONS
User’s Manual U13850EJ6V0UD
631
(2)
µµµµ
PD70F3033A, 70F3033AY
Write/erase characteristics (T
A
= 10 to 85
°°°°
C
… K rank product,
T
A
=
−−−−
20 to +85
°°°°
C
… E rank product,
V
DD
= AV
DD
= BV
DD
= EV
DD
= 4.5 to 5.5 V, V
SS
= AV
SS
= BV
SS
= EV
SS
= 0 V)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
V
PP
power supply voltage
V
PP2
During flash memory
programming
7.5
7.8
8.1
V
V
DD
power supply current
I
DD
When V
PP
= V
PP2
,
f
XX
= 20 MHz
63
mA
V
PP
power supply current
I
PP
V
PP
= V
PP2
100
mA
Step erase time
t
ER
Note 1
0.2
s
Overall erase time per
area
t
ERA
When the step erase time =
0.2 s,
Note 2
20
s/area
Writeback time
t
WB
Note 3
1
ms
Number of writebacks
per writeback command
C
WB
When the writeback time = 1 ms,
Note 4
300
Count/
writeback
command
Number of
erase/writebacks
C
ERWB
16
Count
Step writing time
t
WR
Note 5
20
µ
s
Overall writing time per
word
t
WRW
When the step writing time =
20
µ
s (1 word = 4 bytes),
Note 6
20
200
µ
s/word
Number of rewrites per
area
C
ERWR
1 erase + 1 write after erase = 1
rewrite,
Note 7
Note 8
Count/area
Notes 1.
The recommended setting value of the step erase time is 0.2 s.
2.
The prewrite time prior to erasure and the erase verify time (writeback time) are not included.
3.
The recommended setting value of the writeback time is 1 ms.
4.
Writeback is executed once by the issuance of the writeback command. Therefore, the retry count must be
the maximum value minus the number of commands issued.
5.
The recommended setting value of the step writing time is 20
µ
s.
6.
20
µ
s is added to the actual writing time per word. The internal verify time during and after the writing is not
included.
7.
When writing initially to shipped products, both “erase to write” and “write only” are counted as one rewrite
for.
Example
(P: Write, E: Erase)
Shipped product
→
P
→
E
→
P
→
E
→
P:
3 rewrites
Shipped product
→
E
→
P
→
E
→
P
→
E
→
P:
3 rewrites
8.
K rank product: 20 writes/area
E rank product: 100 writes/area
Remarks 1.
When the PG-FP3 is used, a time parameter required for writing/erasing by downloading parameter
files is automatically set. Do not change the settings unless otherwise specified.
2.
Area 0 = 000000H to 01FFFFH
Area 1 = 020000H to 03FFFFH
Содержание V850/SB1
Страница 2: ...User s Manual U13850EJ6V0UD 2 MEMO ...