28F640L30, 28F128L30, 28F256L30
Table 5. Command Bus Cycles
First Bus Cycle
Second Bus Cycle
Bus
Mode
Command
Cycles
Oper Addr1 Data2 Oper
Addr1
Data2
Read Array
1
≥ 2
≥ 2
2
Write
Write
Write
Write
Write
PnA
PnA
PnA
PnA
X
0xFF
0x90
0x98
0x70
0x50
Read Device Identifier
CFI Query
Read PBA+IA ID
Read PnA+QA QD
Read
Read Status Register
Clear Status Register
Read PnA
SRD
1
0x40/
0x10
Word Program
2
Write
Write
Write
WA
WA
WA
Write WA
Write WA
Write WA
WD
Program
Buffered Program3
≥ 2
> 2
0xE8
0x80
N - 1
0xD0
Buffered Enhanced Factory Program
(Buffered EFP)4
Erase
Block Erase
2
Write
BA
0x20
Write BA
0xD0
Program/Erase Suspend
Program/Erase Resume
Lock Block
1
1
2
2
2
2
2
Write
Write
Write
Write
Write
Write
Write
X
X
0xB0
0xD0
0x60
0x60
0x60
0xC0
0xC0
Suspend
BA
BA
BA
PRA
LRA
Write BA
Write BA
Write BA
Write PRA
Write LRA
0x01
0xD0
0x2F
PD
Block
Locking/
Unlocking
Unlock Block
Lock-down Block
Program Protection Register
Program Lock Register
Protection
LRD
Configuration Program Read Configuration Register
2
Write
RCD
0x60
Write RCD
0x03
NOTES:
1. First command cycle address should be the same as the operation’s target address.
PnA = Address within the partition.
PBA = Partition base address.
IA = Identification code address offset.
QA = CFI Query address offset.
BA = Address within the block.
WA = Word address of memory location to be written.
PRA = Protection Register address.
LRA = Lock Register address.
X = Any valid address within the device.
2. ID = Identifier data.
QD = Query data on D[15:0].
SRD = Status Register data.
WD = Word data.
N = Word count of data to be loaded into the write buffer.
PD = Protection Register data.
PD = Protection Register data.
LRD = Lock Register data.
RCD = Read Configuration Register data on A[15:0]. A[MAX:16] can select any partition.
3. The second cycle of the Buffered Program Command is the word count of the data to be loaded into the write buffer. This is
followed by up to 32 words of data.Then the confirm command (0xD0) is issued, triggering the array programming operation.
4. The confirm command (0xD0) is followed by the buffer data.
Datasheet
19
INTEL [ INTEL ]
