W39V040FAP Winbond Electronics, W39V040FAP Datasheet - Page 16

• Manufacturer Part Number: W39V040FAP
• Manufacturer: Winbond Electronics

Specifications of W39V040FAP

• Density: 4Mb
• Access Time (max): 150ns
• Interface Type: Parallel/Serial
• Boot Type: Top
• Address Bus: 4/11Bit
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: 0C to 70C
• Package Type: PLCC
• Program/erase Volt (typ): 3.3V
• Sync/async: Async/Sync
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8b
• Number Of Words: 512K
• Supply Current: 20mA
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

6.24 Software Product Identification and Boot Block Lockout Detection Acquisition
Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ7 − DQ0 (Hex); Address Format: A14 − A0 (Hex)
(2) A1 − A18 = V
(3) The device does not remain in identification and boot block lockout detection mode if power down.
(4) The DQ[3:0] to indicate the sectors protect status as below:
(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.
0
1
Flow
64K Boot Block
Unlocked by Software
64K Boot Block
Locked by Software
Identification
Product
Entry (1)
address 5555
IL
address 5555
address 2AAA
Pause 10 S
Load data AA
Load data 55
Load data 90
; manufacture code is read for A0 = V
DQ0
to
to
to
μ
16Kbytes Boot Block
Unlocked by Software
16Kbytes Boot Block
Locked by Software
Mode (3)
Identification
and Boot Block
Lockout Detection
Product
Read address = 7FFF2
Check DQ[3:0] of data
outputs
Read address = 00001
Read address = 00000
DQ1
data = DA
data = 34
IL
; device code is read for A0 = V
- 16 -
64Kbytes Boot Block
Unlocked by #TBL
hardware trapping
64Kbytes Boot Block
Locked by #TBL hardware
trapping
(4)
(2)
(2)
DQ2
Identification Exit(6)
Product
Normal Mode
IH
address 5555
Load data 55
Load data AA
address 2AAA
address 5555
Load data F0
Pause 10 S
.
Whole Chip Unlocked by #WP
hardware trapping Except Boot
Block
Whole Chip Locked by #WP
hardware trapping Except Boot
Block
to
to
to
W39V040FA
μ
DQ3
(5)