AT29C020-70PI Atmel, AT29C020-70PI Datasheet - Page 10

• Manufacturer Part Number: AT29C020-70PI
• Description: IC FLASH 2MBIT 70NS 32DIP
• Manufacturer: Atmel

Specifications of AT29C020-70PI

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 2M (256K x 8)
• Speed: 70ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Notes:
Software Protected Program Cycle Waveform
Notes:
Software Data Protection Enable Algorithm
10
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.
1. A8 through A17 must specify the sector address during each high-to-low transition of WE (or CE) after the software code
4. OE must be high when WE and CE are both low.
5. All bytes that are not loaded within the sector being programmed will be indeterminate.
AT29C020
has been entered.
PAGE (128 BYTES)
ADDRESS 2AAA
LOAD DATA AA
ADDRESS 5555
ADDRESS 5555
LOAD DATA A0
LOAD DATA 55
LOAD DATA
TO
TO
TO
TO
(4)
WRITES ENABLED
ENTER DATA
PROTECT STATE
(2)
()
Software Data Protection Disable Algorithm
(1)(4)(5)
PAGE (128 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
(3)
0291N–FLASH–07/02
()