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LHF00L28
Table 4. Command Definitions (10)
9
Bus
First Bus Cycle
Second Bus Cycle
Oper
Command
Cycles
Req’d
Notes
Oper
(1)
Addr (2)
Data
(1)
Addr (2)
Data (3)
Read Array
1
Write
X
FFH
Read Identifier Codes/OTP
Read Query
Read Status Register
≥ 2
≥ 2
2
4
4
Write
Write
Write
X
X
X
90H
98H
70H
Read
Read
Read
IA or OA
QA
X
ID or OD
QD
SRD
Clear Status Register
1
Write
X
50H
Block Erase
Full Chip Erase
Program
2
2
2
5
5, 8
5,6
Write
Write
Write
BA
X
WA
20H
30H
40H or
10H
Write
Write
Write
BA
X
WA
D0H
D0H
WD
Block Erase and
Program Suspend
Block Erase and
Program Resume
1
1
7, 8
7, 8
Write
Write
X
X
B0H
D0H
Set Block Lock Bit
2
Write
BA
60H
Write
BA
01H
Clear Block Lock Bit
Set Block Lock-down Bit
OTP Program
2
2
2
9
8
Write
Write
Write
BA
BA
OA
60H
60H
C0H
Write
Write
Write
BA
BA
OA
D0H
2FH
OD
NOTES:
1. Bus operations are defined in Table 3.
2. All addresses which are written at the first bus cycle should be the same as the addresses which are written at the second
bus cycle.
X=Any valid address within the device.
IA=Identifier codes address (See Table 2).
QA=Query codes address. Refer to Appendix of LHF00LXX series for details.
BA=Address within the block being erased, set/cleared block lock bit or set block lock-down bit.
WA=Address of memory location for the Program command.
OA=Address of OTP block to be read or programmed (See Figure 3).
3. ID=Data read from identifier codes. (See Table 2).
QD=Data read from query database. Refer to Appendix of LHF00LXX series for details.
SRD=Data read from status register. See Table 8 for a description of the status register bits.
WD=Data to be programmed at location WA. Data is latched on the rising edge of WE# or CE# (whichever
goes high first) during command write cycles.
OD=Data within OTP block. Data is latched on the rising edge of WE# or CE# (whichever goes high first)
during command write cycles.
4. Following the Read Identifier Codes/OTP command, read operations access manufacturer code, device code, block lock
configuration code and the data within OTP block (See Table 2).
The Read Query command is available for reading CFI (Common Flash Interface) information.
5. Block erase, full chip erase or program cannot be executed when the selected block is locked. Unlocked block can be
erased or programmed when RST# is V IH .
6. Either 40H or 10H are recognized by the CUI (Command User Interface) as the program setup.
7. If the program operation and the erase operation are both suspended, the suspended program operation will be resumed
first.
8. Full chip erase and OTP program operations can not be suspended. The OTP Program command can not be accepted
while the block erase operation is being suspended.
Rev. 2.45
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