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| 型號： | F49L800UA-90T |
| 廠商： | ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC |
| 元件分類： | DRAM |
| 英文描述： | 8 Mbit (1M x 8/512K x 16) 3V Only CMOS Flash Memory |
| 中文描述： | 512K X 16 FLASH 3V PROM, 90 ns, PDSO48 |
| 封裝： | 12 X 20 MM, TSOP1-48 |
| 文件頁數(shù)： | 34/47頁 |
| 文件大小： | 435K |
| 代理商： | F49L800UA-90T |
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ES MT
F49L800UA/F49L800BA
Elite Semiconductor Memory Technology Inc.
Publication Date : May. 2007
Revision: 1.2 34/47
Figure 16. In-System Sector Protect/Unprotect Algorithm (
RESET
= V
ID
)
Start
Start
PLSCNT = 1
PLSCNT = 1
Set up first
sector address
Sector Unprotect :
Write 60h to sector
address with
A6 = 1, A1 = 1,
A0 = 0
Wait 15 ms
First Write
Cycle = 60h
All sectors
protected
Data = 00h
Last sector
verified
No
RESET = V
ID
No
No
Yes
Yes
No
No
No
Yes
Yes
First Write
Cycle = 60h
Temporary Sector
Unprotect Mode
Set up
next sector
address
Device failed
Device failed
Yes
Wait 1μ
Temporary Sector
Unprotect Mode
Data = 01h
Yes
RESET = V
ID
PLSCNT
= 1000
Wait 1μ
Increment
PLSCNT
Set up sector
address
Sector Protect :
Write 60h to sector
address with
A6 = 0, A1 = 1,
A0 = 0
Verify Sector
Protect : Write 40h
to sector address
with A6 = 0,
A1 = 1, A0 = 0
Wait 150 s
μ
Read from
sector address
with A6 = 0,
A1 = 1, A0 = 0
PLSCNT = 25
Increment
PLSCNT
Protect another
sector
No
No
No
Remove V
ID
from RESET
Remove V
ID
from RESET
Write reset
command
Write reset
command
Sector Protect
complete
Sector Protect
complete
Sector Protect
Algorithm
Sector Unprotect
Algorithm
Yes
Reset
PLSCNT = 1
Protect all sector :
The indicated portion
of the sector protect
algorithm must be
performed for all
unprotected sectors
prior to issuing the
first sector
unprotect address
Yes
Yes
Read from
sector address
with A6 = 1,
A1 = 1, A0 =0
Verify Sector
Unprotect : Write
40h to sector
address with
A6 = 1, A1 = 1,
A0 =0
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| F49L800UA-90TG | 制造商:ESMT 制造商全稱:Elite Semiconductor Memory Technology Inc. 功能描述:8 Mbit (1M x 8/512K x 16) 3V Only CMOS Flash Memory |
| F49L800UA-90TIG | 制造商:ESMT 制造商全稱:Elite Semiconductor Memory Technology Inc. 功能描述:8 Mbit (1M x 8/512K x 16) 3V Only CMOS Flash Memory |
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