JS28F320J3F75A NUMONYX, JS28F320J3F75A Datasheet - Page 33

• Manufacturer Part Number: JS28F320J3F75A
• Description: PARALLEL NOR
• Manufacturer: NUMONYX

Numonyx
8.3
8.3.1
8.4
March 2010
208032-02
®
Embedded Flash Memory (J3 65 nm) Single Bit per Cell (SBC)
Standby
CE0, CE1, and CE2 can disable the device (see
standby mode. This manipulation of CEx substantially reduces device power
consumption. DQ[15:0] outputs are placed in a high-impedance state independent of
OE#. If deselected during block erase, program, or lock-bit configuration, the WSM
continues functioning, and consuming active power until the operation completes.
Reset/Power-Down
RP# at V
In read modes, RP#-low deselects the memory, places output drivers in a high-
impedance state, and turns off numerous internal circuits. RP# must be held low for a
minimum of t
memory access outputs are valid. After this wake-up interval, normal operation is
restored. The CUI is reset to read array mode and Status Register is set to 0080h.
During Block Erase, Program, or Lock-Bit Configuration modes, RP#-low will abort the
operation. In default mode, STS transitions low and remains low for a maximum time
of t
are no longer valid; the data may be partially corrupted after a program or partially
altered after an erase or lock-bit configuration. Time t
logic-high (V
As with any automated device, it is important to assert RP# during system reset. When
the system comes out of reset, it expects to read from the flash memory. Automated
flash memories provide status information when accessed during Block Erase, Program,
or Lock-Bit Configuration modes. If a CPU reset occurs with no flash memory reset,
proper initialization may not occur because the flash memory may be providing status
information instead of array data. Numonyx Flash memories allow proper initialization
following a system reset through the use of the RP# input. In this application, RP# is
controlled by the same RESET# signal that resets the system CPU.
Device Commands
When V
codes, or blocks are enabled. Placing V
program, and lock-bit configuration operations. Device operations are selected by
writing specific commands to the Command User Interface (CUI). The CUI does not
occupy an addressable memory location. It is the mechanism through which the flash
device is controlled.
A command sequence is issued in two consecutive write cycles - a Setup command
followed by a Confirm command. However, some commands are single-cycle
commands consisting of a setup command only. Generally, commands that alter the
contents of the flash device, such as Program or Erase, require at least two write cycles
to guard against inadvertent changes to the flash device. Flash commands fall into two
categories: Basic Commands and Extended Commands. Basic commands are
recognized by all Numonyx Flash devices, and are used to perform common flash
operations such as selecting the read mode, programming the array, or erasing blocks.
Extended commands are product-dependant; they are used to perform additional
features such as software block locking.
page 48
PLPH
PEN
+ t
describes all applicable commands on J3 65 nm SBC device.
IL
initiates the reset/power-down mode.
PHRH
≤ V
IH
PLPH
) before another command can be written.
PENLK
until the reset operation is complete. Memory contents being altered
. Time t
, only read operations from the Status Register, CFI, identifier
PHQV
is required after return from reset mode until initial
PENH
Section 11.0, “Device Command Codes” on
on V
Table 17 on page
PEN
additionally enables block erase,
PHWL
is required after RP# goes to
30) and place it in
Datasheet
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