JS48F4400PCZ00 datasheet(53/102 Pages) NUMONYX

53 / 102 page

November 2007

Datasheet

Order Number: 290701-18

Numonyx™ Wireless Flash Memory (W18)

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.

Protection

Protection Program

Write

C0h

Write

Lock Protection Program

Write

LPA

C0h

Write

LPA

FFFDh

Configuration

Set Configuration Register

Write

60h

Write

03h

Notes:

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.

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

Commands other than those shown above are reserved by Numonyx for future device implementations and should not

be used.

Table 23: Bus Cycle Definitions

Operation

Command

Bus

Cycles

First Bus Cycle

Second Bus Cycle

Oper

Addr1

Data2,3

Oper

Addr1

Data2,3

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