PF38F5070M0P0B NUMONYX [Numonyx B.V], PF38F5070M0P0B Datasheet - Page 65

• Manufacturer Part Number: PF38F5070M0P0B
• Description: Numonyx Wireless Flash Memory (W18)
• Manufacturer: NUMONYX [Numonyx B.V]

Numonyx™ Wireless Flash Memory (W18)
12.0
12.1
November 2007
Order Number: 290701-18
Program and Erase Operations
Program/Erase Suspend and Resume
The Program Suspend and Erase Suspend commands halt an in-progress program or
erase operation. The command can be issued at any device address. The partition
corresponding to the command’s address remains in its previous state. A suspend
command allows data to be accessed from memory locations other than the one being
programmed or the block being erased.
A program operation can be suspended only to perform a read operation. An erase
operation can be suspended to perform either a program or a read operation within any
block, except the block that is erase suspended. A program command nested within a
suspended erase can subsequently be suspended to read yet another location. Once a
program or erase process starts, the Suspend command requests that the WSM
suspend the program or erase sequence at predetermined points in the algorithm. The
partition that is actually suspended continues to output Status Register data after the
Suspend command is written. An operation is suspended when status bits SR[7] and
SR[6] and/or SR[2] are set.
To read data from blocks within the partition (other than an erase-suspended block),
you can write a Read Array command. Block erase cannot resume until the program
operations initiated during erase suspend are complete. Read Array, Read Status
Register, Read Identifier (ID), Read Query, and Program Resume are valid commands
during Program or Erase Suspend. Additionally, Clear Status Register, Program,
Program Suspend, Erase Resume, Lock Block, Unlock Block, and Lock-Down Block are
valid commands during erase suspend.
To read data from a block in a partition that is not programming or erasing, the
operation does not need to be suspended. If the other partition is already in Read
Array, ID, or Query mode, issuing a valid address returns corresponding data. If the
other partition is not in a read mode, one of the read commands must be issued to the
partition before data can be read.
During a suspend, CE# = V
current. V
in suspend mode.
A resume command instructs the WSM to continue programming or erasing and clears
Status Register bits SR[2] (or SR[6]) and SR[7]. The Resume command can be written
to any partition. When read at the partition that is programming or erasing, the device
outputs data corresponding to the partition’s last mode. If Status Register error bits are
set, the Status Register can be cleared before issuing the next instruction. RST# must
remain at V
Figure 29, “Erase Suspend / Resume Flowchart” on page
If a suspended partition was placed in Read Array, Read Status Register, ID, or Query
mode during the suspend, the device remains in that mode and outputs data
corresponding to that mode after the program or erase operation is resumed. After
resuming a suspended operation, issue the read command appropriate to the read
operation. To read status after resuming a suspended operation, issue a Read Status
Register command (70h) to return the suspended partition to status mode.
PP
IH
must remain at its program level and WP# must remain unchanged while
. See
Figure 28, “Program Suspend / Resume Flowchart” on page
IH
places the device in standby state, which reduces active
67.
66, and
Datasheet
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