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AT28C64B-15PI

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
10
AT28C64B
0270I–PEEPR–08/03
Software Data Protection Disable Algorithm
(1)
Note: 1. Notes for software program code:
2. Data Format: I/O7 - I/O0 (Hex);
Address Format: A12 - A0 (Hex).
3. Write Protect state will be activated at end of write even if no other data is loaded.
4. Write Protect state will be deactivated at end of write period even if no other data is
loaded.
5. 1 to 64 bytes of data are loaded.
LOAD DATA AA
TO
ADDRESS 1555
LOAD DATA 55
TO
ADDRESS 0AAA
LOAD DATA 80
TO
ADDRESS 1555
LOAD DATA AA
TO
ADDRESS 1555
LOAD DATA 20
TO
ADDRESS 1555
LOAD DATA XX
TO
ANY ADDRESS
(4)
LOAD LAST BYTE
TO
LAST ADDRESS
LOAD DATA 55
TO
ADDRESS 0AAA
EXIT DATA
PROTECT STATE
(3)
11
AT28C64B
0270I–PEEPR–08/03
Software Protected Write Cycle Waveforms
(1)(2)
Notes: 1. A6 through A12 must specify the same page address during each high to low transition of WE (or CE) after the software
code has been entered.
2. OE
must be high only when WE and CE are both low.
OE
WE
CE
A6 - A12
DATA
A0 -A5
t
AS
t
AH
t
DS
t
DH
t
WP
t
WPH
t
BLC
t
WC
12
AT28C64B
0270I–PEEPR–08/03
Notes: 1. These parameters are characterized and not 100% tested. See “AC Read Characteristics” on page 5.
Data Polling Waveforms
Data
Polling Characteristics
(1)
Symbol Parameter Min Typ Max Units
t
DH
Data Hold Time 0 ns
t
OEH
OE Hold Time 0 ns
t
OE
OE to Output Delay
(1)
ns
t
WR
Write Recovery Time 0 ns
t
DH
t
OE
t
OEH
t
WR
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

AT28C64B-15PI

Mfr. #:
Buy AT28C64B-15PI
Manufacturer:
Microchip Technology / Atmel
Description:
EEPROM DIE WAFER FORM - 150NS IND TEMP
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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