Numonyx™ Wireless Flash Memory (W18)
Table 23: Bus Cycle Definitions
First Bus Cycle
Addr1
Second Bus Cycle
Bus
Cycles
Operation
Command
Oper
Data2,3
Oper
Addr1
Data2,3
Protection Program
2
2
2
Write
PA
LPA
CD
C0h
Write
Write
Write
PA
PD
FFFDh
03h
Protection
Lock Protection Program
Set Configuration Register
Write
Write
C0h
60h
LPA
CD
Configuration
Notes:
1.
First-cycle command addresses should be the same as the operation’s target address. Examples: the first-cycle address
for the Read Identifier command should be the same as the Identification code address (IA); the first-cycle address for
the Word Program command should be the same as the word address (WA) to be programmed; the first-cycle address
for the Erase/Program Suspend command should be the same as the address within the block to be suspended; etc.
XX = Any valid address within the device.
IA = Identification code address.
BA = Block Address. Any address within a specific block.
LPA = Lock Protection Address is obtained from the CFI (through the CFI Query command). The Numonyx Wireless
Flash Memory (W18) family’s LPA is at 0080h.
PA = User programmable 4-word protection address.
PnA = Any address within a specific partition.
PBA = Partition Base Address. The very first address of a particular partition.
QA = CFI code address.
WA = Word address of memory location to be written.
SRD = Status register data.
WD = Data to be written at location WA.
2.
IC = Identifier code data.
PD = User programmable 4-word protection data.
QD = Query code data on DQ[7:0].
CD = Configuration register code data presented on device addresses A[15:0]. A[MAX:16] address bits can select any
partition. See Table 31, “Read Configuration Register Descriptions” on page 78 for Configuration
Register bits descriptions.
Commands other than those shown above are reserved by Numonyx for future device implementations and should not
be used.
3.
9.3
Command Sequencing
When issuing a 2-cycle write sequence to the flash device, a read operation is allowed
to occur between the two write cycles. The setup phase of a 2-cycle write sequence
places the addressed partition into read-status mode, so if the same partition is read
before the second “confirm” write cycle is issued, Status Register data will be returned.
Reads from other partitions, however, can return actual array data assuming the
addressed partition is already in read-array mode. Figure 23 and Figure 24 illustrate
these two conditions.
November 2007
Order Number: 290701-18
Datasheet
53
NUMONYX [ NUMONYX B.V ]
