W49F002U-12B Winbond Electronics, W49F002U-12B Datasheet - Page 12

• Manufacturer Part Number: W49F002U-12B
• Manufacturer: Winbond Electronics

Specifications of W49F002U-12B

• Density: 2Mb
• Access Time (max): 120ns
• Interface Type: Parallel
• Boot Type: Top
• Address Bus: 18b
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Package Type: PDIP
• Program/erase Volt (typ): 5V
• Sync/async: Asynchronous
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Word Size: 8b
• Number Of Words: 256K
• Supply Current: 50mA
• Mounting: Through Hole
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

Software Product Identification and Boot Block Lockout Detection Acquisition
Flow
Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ15
(2) A1
(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-write cycle (write F0 hex at XXXX address) can be used to exit the product identification/boot block lockout detection.
inactivated and the block can be programmed.
A16 = V
Entry (1)
Product
Identification
IL
address 5555
address 5555
address 2AAA
Pause 10 S
; manufacture code is read for A0 = V
Load data AA
Load data 55
Load data 90
DQ8 (Don't Care), DQ7
to
to
to
Mode (3)
Identification
and Boot Block
Lockout Detection
Product
Read address = 0002
Read address = 0001
DQ0 (Hex); Address Format: A14
Read address = 0000
data in DQ0 =1/0
IL
; device code is read for A0 = V
data = 00AE
data = 00DA
- 12 -
(4)
(2)
(2)
A0 (Hex)
IH
.
Product
Identification Exit(6)
Normal Mode
address 5555
Load data 55
address 2AAA
Load data AA
address 5555
Load data F0
Pause 10 S
to
to
to
W49F002U
(5)