28F256L18 View Datasheet(PDF) - Numonyx -> Micron
Part Name
Description
MFG CO.
'28F256L18' PDF : 106 Pages View PDF
Numonyx™ StrataFlash® Wireless Memory (L18)
Table 20: Command Bus Cycles (Sheet 2 of 2)
Mode
Command
Bus
Cycles
First Bus Cycle
Oper Addr1 Data2
Second Bus Cycle
Oper Addr1 Data2
Protection
Program Protection Register
Program Lock Register
2 Write PRA 0xC0 Write PRA
2 Write LRA 0xC0 Write LRA
PD
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 DQ[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.
9.3
Command Definitions
Valid device command codes and descriptions are shown in Table 21.
Table 21: Command Codes and Definitions (Sheet 1 of 3)
Mode
Code Device Mode
Description
Read
0xFF
0x70
0x90
0x98
0x50
Read Array
Places the addressed partition in Read Array mode. Array data is output on
DQ[15:0].
Read Status
Register
Places the addressed partition in Read Status Register mode. The partition enters
this mode after a program or erase command is issued. Status Register data is
output on DQ[7:0].
Read Device ID
or
Configuration
Register
Places the addressed partition in Read Device Identifier mode. Subsequent reads
from addresses within the partition outputs manufacturer/device codes,
Configuration Register data, Block Lock status, or Protection Register data on
DQ[15:0].
Read Query
Places the addressed partition in Read Query mode. Subsequent reads from the
partition addresses output Common Flash Interface information on DQ[7:0].
Clear Status
Register
The WSM can only set Status Register error bits. The Clear Status Register
command is used to clear the SR error bits.
November 2007
251902-12
Datasheet
45
Share Link: 
