W29C040P-90 Winbond Electronics, W29C040P-90 Datasheet - Page 10

• Manufacturer Part Number: W29C040P-90
• Manufacturer: Winbond Electronics

Specifications of W29C040P-90

• Density: 4Mb
• Access Time (max): 90ns
• Interface Type: Parallel
• Boot Type: Bottom/Top
• Address Bus: 19b
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Package Type: PLCC
• 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: 512K
• Supply Current: 50mA
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Not Compliant

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 − A18 = V
(3) The device does not remain in identification and boot block (address 0002 Hex/7FFF2 Hex respond to first 16K/last 16K) lockout detection
mode if power down.
(4), (5) If the output data is "FF Hex," the boot block programming lockout feature is activated; if the output data "FE Hex," the lockout feature is
(6) The device returns to standard operation mode.
(7) This product supports both the JEDEC standard 3 bytes command code sequence and original 6 byte command code sequence. For new
BYTE SEQUENCE
inactivated and the block can be programmed.
designs, Winbond recommends that the 3 bytes command code sequence be used.
0 Write
1 Write
2 Write
3 Write
4 Write
5 Write
IL
; manufacture code is read for A0 = V
address 2AAA
IDENTIFICATION/BOOT BLOCK LOCKOUT
Product
Identification
Entry (1)
address 5555
Load data AA
address 5555
Load data 55
Load data 90
ADDRESS
to
to
to
2AAA
5555
5555
ALTERNATE PRODUCT (7)
-
-
-
DETECTION ENTRY
Pause 10 μS
Product
Identification
and Boot Block
Lockout Detection
Mode (3)
IL
Read address = 7FFF2
; device code is read for A0 = V
Read address = 00000
Read address = 00002
Read address = 00001
data = FF/FE
data = FF/FE
data = DA
data = 46
DATA
- 10 -
AA
55
90
-
-
-
(4)
(5)
(2)
(2)
Product
Identification
Exit (1)
IH
.
IDENTIFICATION/BOOT BLOCK LOCKOUT
address 2AAA
Load data AA
address 5555
address 5555
Load data 55
Load data F0
Pause 10 uS
Normal Mode
ADDRESS
2AAAH
5555H
5555H
to
to
to
-
-
-
SOFTWARE PRODUCT
DETECTION EXIT
Pause 10 μS
(6)
W29C040
DATA
AAH
55H
F0H
-
-
-