AT28C040-20LM/883(Old_V) 데이터 시트보기 (PDF) - Atmel Corporation
부품명
상세내역
제조사
AT28C040-20LM/883 Datasheet PDF : 11 Pages
| |||
Software Data
Protection Enable Algorithm (1)
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA A0
TO
ADDRESS 5555
LOAD DATA XX
TO
ANY ADDRESS (4)
WRITES ENABLED (2)
LOAD LAST BYTE
TO
LAST ADDRESS
ENTER DATA
PROTECT STATE
Notes:
1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A14 - A0 (Hex).
2. Write Protect state will be activated at end of write even if no
other data is loaded.
3. Write Protect state will be deactivated at end of write period
even if no other data is loaded.
4. 1 to 256-bytes of data are loaded.
Software Data
Protection Disable Algorithm (1)
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA 80
TO
ADDRESS 5555
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA 20
TO
ADDRESS 5555
LOAD DATA XX
TO
ANY ADDRESS (4)
EXIT DATA
PROTECT STATE (3)
LOAD LAST BYTE
TO
LAST ADDRESS
Software Protected Program Cycle Waveform (1, 2, 3)
Notes: 1. A0 - A14 must conform to the addressing sequence for
the first 3-bytes as shown above.
2. After the command sequence has been issued and a
page write operation follows, the page
address inputs (A8 - A18) must be the same for each
high to low transition of WE (or CE).
3. OE must be high only when WE and CE are both low.
2-262
AT28C040
Share Link: 