AT29C512-90JI Atmel, AT29C512-90JI Datasheet - Page 11

• Manufacturer Part Number: AT29C512-90JI
• Description: IC FLASH 512KBIT 90NS 32PLCC
• Manufacturer: Atmel

Specifications of AT29C512-90JI

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 512K (64K 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: AT29C51290JI

20. Software Protected Program Cycle Waveform
Notes:
18. Software Data Protection
Notes:
0456i–FLASH–9/08
Enable Algorithm
1. A7 through A15 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
2. Data Protect state will be activated at end of program
3. Data Protect state will be deactivated at end of pro-
4. 128 bytes of data MUST BE loaded.
been entered.
- A0 (Hex).
cycle.
gram period.
SECTOR (128 BYTES)
ADDRESS 2AAA
ADDRESS 5555
ADDRESS 5555
LOAD DATA AA
LOAD DATA A0
LOAD DATA 55
LOAD DATA
OE
CE
WE
A0-A6
A7-A15
DATA
TO
TO
TO
TO
(1)
(3)
(2)
(4)
t
AS
(1)
WRITES ENABLED
ENTER DATA
PROTECT STATE
5555
AA
t
t
AH
DS
(2)
2AAA
t
WP
55
t
DH
5555
A0
t
WPH
BYTE ADDRESS
SECTOR ADDRESS
19. Software Data Protection
BYTE 0
Disable Algorithm
(1)(2)(3)
SECTOR (128 BYTES)
BYTE 126
ADDRESS 2AAA
ADDRESS 2AAA
ADDRESS 5555
ADDRESS 5555
ADDRESS 5555
ADDRESS 5555
LOAD DATA AA
LOAD DATA AA
LOAD DATA 55
LOAD DATA 80
LOAD DATA 55
LOAD DATA 20
LOAD DATA
t
BLC
TO
TO
TO
TO
TO
TO
TO
BYTE 127
(4)
t
EXIT DATA
PROTECT STATE
WC
(1)
AT29C512
(3)
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