
LHF64FD1 9
NOTES:
1. Bus operations are defined in Table 3.
2. The address which is written at the first bus cycle should be the same as the address which is 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 LH28F640BF 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 or the first address for the Page Buffer 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 LH28F640BF series for details.
SRD=Data read from status register. See Table 7 and 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).
OD=Data to be programmed at location OA. Data is latched on the rising edge of WE# or CE# (whichever goes
high first).
N-1=N is the number of the words to be loaded into a page buffer.
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 (page buffer) program cannot be executed when the selected block is locked. Unlocked
block can be erased or programmed when RST# is VIH.
6. Either 40H or 10H are recognized by the CUI (Command User Interface) as the program setup.
7. Following the third bus cycle, inputs the program sequential address and write data of "N" times. Finally, input the any
valid address within the target block to be programmed and the confirm command (D0H). Refer to Appendix of
LH28F640BF series for details.
8. Full chip erase and OTP program operations can not be suspended. The OTP Program command can not be accepted
Table 4. Command Definitions(10)
Command
Bus
Cycles
Req’d
Notes
First Bus Cycle Second Bus Cycle
Oper(1) Addr(2) Data(3) Oper(1) Addr(2) Data(3)
Read Array 1 2 Write X FFH
Read Identifier Codes/OTP ≥ 2 2,3,4 Write X 90H Read IA or OA ID or OD
Read Query ≥ 2 2,3,4 Write X 98H Read QA QD
Read Status Register 2
2,3,11
Write BA or WA 70H Read BA or WA SRD
Clear Status Register 1 2 Write X 50H
Block Erase 2 2,3,5 Write BA 20H Write BA D0H
Full Chip Erase 2 2,5,8 Write X 30H Write X D0H
Program 2 2,3,5,6 Write WA 40H or
10H Write WA WD
Page Buffer Program ≥ 4 2,3,5,7 Write WA E8H Write WA N-1
Block Erase and (Page Buffer)
Program Suspend 12,8WriteBA or WAB0H
Block Erase and (Page Buffer)
Program Resume 1 2,8 Write BA or WA D0H
Set Block Lock Bit 2 2 Write BA 60H Write BA 01H
Clear Block Lock Bit 2 2,9 Write BA 60H Write BA D0H
Set Block Lock-down Bit 2 2 Write BA 60H Write BA 2FH
OTP Program 2 2,3,8 Write OA C0H Write OA OD
Rev. 2.41
sharp