參數(shù)資料
型號(hào)： W29S201T-55
廠商： WINBOND ELECTRONICS CORP
元件分類： PROM
英文描述： 128K X 16 FLASH 5V PROM, 17 ns, PDSO48
封裝： 12 X 20 MM, TSOP1-48
文件頁(yè)數(shù)： 5/31頁(yè)
文件大?。?/td> 253K
代理商： W29S201T-55
Preliminary W29S201
Publication Release Date: April 1999
- 13 -
Revision A1
Command Codes for Product Identification and Boot Block Lockout Detection
BYTE
SEQUENCE
ALTERNATE PRODUCT (6)
IDENTIFICATION/BOOT BLOCK LOCKOUT
DETECTION ENTRY
SOFTWARE PRODUCT
IDENTIFICATION/BOOT BLOCK LOCKOUT
DETECTION EXIT (7)
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 = 00DA
Read address = 0001
data = 0FAE
Read address = 0002
data in DQ0 =1/0
(4)
Product
Identification Exit(7)
Load data 55
to
address 2AAA
Load data F0
to
address 5555
Normal Mode
(5)
(2)
Load data AA
to
address 5555
Load data AA
to
address 5555
Pause 10 S
Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ15-DQ8 (Don't Care), DQ7
DQ0 (Hex); Address Format: A14A0 (Hex)
(2) A1
A16 = 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 block can be programmed.
(5) The device returns to standard operation mode.
(6) Optional 1-write cycle (write F0 hex at XXXX address) can be used to exit the product identification/boot block lockout detection.
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