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| 型號： | M38021E1-256SP |
| 廠商： | Mitsubishi Electric Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 1 watt dc-dc converters |
| 中文描述： | 1瓦的DC - DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 39/62頁 |
| 文件大?。?/td> | 2389K |
| 代理商： | M38021E1-256SP |
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Data Sheet U14893EJ2V0DS
42
PD703032A, 703032AY, 70F3032A, 70F3032AY
3.1 Flash Memory Programming Mode (
PD70F3032A, 70F3032AY only)
Write/erase characteristics (TA =
20 to +85 °°°°C, VDD = AVDD = BVDD = EVDD = 4.5 to 5.5 V,
VSS = AVSS = BVSS = EVSS = 0 V)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
VPP power supply voltage
VPP2
During flash memory
programming
7.5
7.8
8.1
V
VDD power supply current
IDD
When VPP = VPP2, fXX = 20 MHz
73
mA
VPP power supply current
IPP
VPP = VPP2
100
mA
Step erase time
tER
Note 1
0.2
s
Overall erase time per area
tERA
When the step erase time =
0.2 s, Note 2
20
s/area
Write-back time
tWB
Note 3
1ms
Number of write-backs per
write-back command
CWB
When the write-back time =
1 ms, Note 4
300
Count/write-
back
command
Number of erase/write-backs
CERWB
16
Count
Step writing time
tWR
Note 5
20
s
Overall writing time per word
tWRW
When the step writing time
= 20
s (1 word = 4 bytes),
Note 6
20
200
s/word
Number of rewrites per area
CERWR
1 erase + 1 write after
erase = 1 rewrite, Note 7
100
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 (write-back time) are not included.
3.
The recommended setting value of the write-back time is 1 ms.
4.
Write-back is executed once by the issuance of the write-back 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
s.
6.
20
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, it is counted as one rewrite for both “erase to write” and
“write only”.
Example (P: Write, E: Erase)
Shipped product
→ P → E → P → E → P: 3 rewrites
Shipped product
→ E → P → E → P → E → P: 3 rewrites
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 2 = 040000H to 05FFFFH
Area 1 = 020000H to 03FFFFH Area 3 = 060000H to 07FFFFH
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