W28F641B Datasheet, PDF (10/31 Pages) Winbond – 64MBIT (4MBIT × 16) PAGE MODE DUAL WORK FLASH MEMORY

W28F641B/T
Table 6. Command Definitions⁽¹¹⁾
COMMAND
BUS
CYCLES NOTE
REQ’D.
FIRST BUS CYCLE
SECOND BUS CYCLE
Oper⁽¹⁾ Addr⁽²⁾ Data Oper⁽¹⁾ Addr⁽²⁾ Data⁽³⁾
Read Array
1
Write PA FFH
Read Identifier Codes/OTP
≥2
4
Write PA 90H Read IA or OA ID or OD
Read Query
≥2
4
Write PA 98H Read QA
QD
Read Status Register
2
Write PA 70H Read
PA
SRD
Clear Status Register
1
Write PA 50H
Block Erase
Full Chip Erase
2
5
Write BA 20H Write
BA
D0H
2
5, 9
Write
X
30H Write
X
D0H
Program
2
5, 6
Write
WA
40H or
10H
Write
WA
WD
Page Buffer Program
≥4
5, 7
Write WA E8H Write WA
N-1
Block Erase and (Page Buffer)
Program Suspend
1
8, 9
Write PA B0H
Block Erase and (Page Buffer)
Program Resume
1
Set Block Lock Bit
2
8, 9
Write PA D0H
Write
BA 60H Write
BA
01H
Clear Block Lock Bit
2
10
Write BA 60H Write
BA
D0H
Set Block Lock-down Bit
2
Write
BA 60H Write
BA
2FH
OTP Program
2
9
Write OA C0H Write OA
OD
Set Partition configuration
Register
2
Write PCRC 60H Write PCRC 04H
Notes:
1. Bus operations are defined in Table 5.
2. All 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.
PA = Address within the selected partition.
IA = Identifier codes address (See Table 3 and Table 4).
QA = Query codes address. Refer to Appendix 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).
PCRC = Partition configuration register code presented on the address A0 − A15.
3. ID = Data read from identifier codes. (See Table 3 and Table 4).
QD = Data read from query database. Refer to Appendix for details.
SRD = Data read from status register. See Table 10 and Table 11 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.
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, partition configuration register code and the data within OTP block (See Table 3 and Table 4). 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 #RESET is VIH.
6. Either 40H or 10H are recognized by the CUI (Command User Interface) as the program setup.
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