w49f020 ETC-unknow, w49f020 Datasheet - Page 8

no-image

w49f020

Manufacturer Part Number
w49f020
Description
Manufacturer
ETC-unknow
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
w49f020T-90B
Manufacturer:
SANKEN
Quantity:
1 098
Command Codes for Product Identification and Boot Block Lockout Detection
Software Product Identification and Boot Block Lockout Detection Acquisition Flow
Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ7 DQ0 (Hex); Address Format: A14 A0 (Hex)
(2) A1 A17 = V
(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
(5) The device returns to standard operation mode.
(6) Optional 1-word cycle (write F0 hex at XXXX address) can be used to exit the product identification/boot block lockout detection.
SEQUENCE
inactivated and the block can be programmed.
1 Write
2 Write
3 Write
BYTE
IL
; manufacture code is read for A0 = V
Product
Identification
Entry (1)
address 5555
address 5555
address 2AAA
Pause 10 S
Load data AA
Load data 55
Load data 90
to
to
to
IDENTIFICATION/BOOT BLOCK
ADDRESS
LOCKOUT DETECTION ENTRY
ALTERNATE PRODUCT (6)
2AAA
5555
5555
Pause 10 S
Mode (3)
Identification
and Boot Block
Lockout Detection
Product
Read address = 00002
Read address = 00001
Read address = 00000
data in DQ0 = "1"/"0"
IL
; device code is read for A0 = V
data = DA
data =8C
DATA
AA
55
90
- 8 -
(4)
(2)
(2)
IDENTIFICATION/BOOT BLOCK LOCKOUT
IH
.
Preliminary W49F020
ADDRESS
Identification Exit(7)
Product
2AAAH
5555H
5555H
SOFTWARE PRODUCT
DETECTION EXIT (7)
Normal Mode
address 5555
Load data 55
Load data AA
address 2AAA
address 5555
Load data F0
Pause 10 S
Pause 10 S
to
to
to
DATA
AAH
(5)
F0H
55H

Related parts for w49f020