AT29C020-90JI Atmel, AT29C020-90JI Datasheet - Page 11
![IC FLASH 2MBIT 90NS 32PLCC](/photos/7/21/72190/453-32-plcc_sml.jpg)
AT29C020-90JI
Manufacturer Part Number
AT29C020-90JI
Description
IC FLASH 2MBIT 90NS 32PLCC
Manufacturer
Atmel
Datasheet
1.AT29C020-12JU.pdf
(17 pages)
Specifications of AT29C020-90JI
Format - Memory
FLASH
Memory Type
FLASH
Memory Size
2M (256K x 8)
Speed
90ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
32-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
AT29C02090JI
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT29C020-90JI
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
20. Software Protected Program Cycle Waveform
Notes:
18. Software Data Protection
0291S–FLASH–11/08
Notes:
Enable Algorithm
1. A8 through A17 must specify the sector address during each high-to-low transition of WE (or CE) after the software code has
2. OE must be high when WE and CE are both low.
3. All bytes that are not loaded within the sector being programmed will be indeterminate.
1. Data Format: I/O7 - I/O0 (Hex); Address Format: A14 - A0 (Hex).
2. Data Protect state will be activated at end of program cycle.
3. Data Protect state will be deactivated at end of program period.
4. 256 bytes of data MUST BE loaded.
been entered.
SECTOR (256 BYTES)
ADDRESS 2AAA
LOAD DATA AA
ADDRESS 5555
LOAD DATA A0
ADDRESS 5555
LOAD DATA 55
LOAD DATA
TO
TO
TO
TO
(4)
(1)
WRITES ENABLED
ENTER DATA
PROTECT STATE
(2)
19. Software Data Protection
Disable Algorithm
(1)(2)(3)
SECTOR (256 BYTES)
ADDRESS 2AAA
ADDRESS 2AAA
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
LOAD DATA 55
LOAD DATA 80
LOAD DATA 55
LOAD DATA 20
LOAD DATA
TO
TO
TO
TO
TO
TO
TO
(4)
EXIT DATA
PROTECT STATE
(1)
AT29C020
(3)
11