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參數(shù)資料
| 型號： | W49F002U-90 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | PROM |
| 英文描述： | 256K X 8 FLASH 5V PROM, 90 ns, PDIP32 |
| 封裝： | PLASTIC, DIP-32 |
| 文件頁數(shù)： | 2/23頁 |
| 文件大?。?/td> | 303K |
| 代理商： | W49F002U-90 |
W49F002U
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Command Codes for Product Identification and Boot Block Lockout Detection
BYTE
SEQUENCE
SOFTWARE PRODUCT
IDENTIFICATION/BOOT BLOCK
LOCKOUT DETECTION ENTRY
SOFTWARE PRODUCT
IDENTIFICATION/BOOT BLOCK
LOCKOUT DETECTION EXIT(6)
ADDRESS
DATA
ADDRESS
DATA
1 Write
5555
AA
5555H
AAH
2 Write
2AAA
55
2AAAH
55H
3 Write
5555
90
5555H
F0H
Pause 10
S
Pause 10
S
Software Product Identification and Boot Block Lockout Detection Acquisition Flow
Product
Identification
Entry (1)
Load data 55
to
address 2AAA
Load data 90
to
address 5555
Pause 10 S
Product
Identification
and Boot Block
Lockout Detection
Mode (3)
Read address = 0000
data = DA
Read address = 0001
Read address = 0002
data =in DQ0= "1" / "0"
(4)
Product
Identification Exit(6)
Load data 55
to
address 2AAA
Load data F0
to
address 5555
Normal Mode
(5)
(2)
Load data AA
to
address 5555
Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ7
DQ0 (Hex); Address Format: A14A0 (Hex)
(2) A1
A17 = VIL; manufacture code is read for A0 = VIL; device code is read for A0 = VIH.
(3) The device does not remain in identification and boot block lockout detection mode if power down.
(4) If the output data in DQ0= " 1 " the boot block programming lockout feature is activated; if the output data in DQ0 = " 0 ,"
the lockout feature is inactivated and the boot block can be programmed.
(5) The device returns to standard operation mode.
(6) Optional 1-byte cycle (write F0 hex at XXXX address) can be used to exit the product identification/boot block lockout
detection.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W49F002U-90B | 制造商:WINBOND 制造商全稱:Winbond 功能描述:256K X 8 CMOS FLASH MEMORY |
| W49F002UP12B | 制造商:WINBOND 制造商全稱:Winbond 功能描述:256K X 8 CMOS FLASH MEMORY |
| W49F002UP70B | 制造商:WINBOND 制造商全稱:Winbond 功能描述:256K X 8 CMOS FLASH MEMORY |
| W49F002UP90B | 制造商:WINBOND 制造商全稱:Winbond 功能描述:256K X 8 CMOS FLASH MEMORY |
| W49F002UT12B | 制造商:WINBOND 制造商全稱:Winbond 功能描述:256K X 8 CMOS FLASH MEMORY |
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