m58lw064c STMicroelectronics, m58lw064c Datasheet - Page 12

• Manufacturer Part Number: m58lw064c
• Description: 64 Mbit 4mb X16, Uniform Block, Burst 3v Supply Flash Memory
• Manufacturer: STMicroelectronics

M58LW064C
dicates that the data is not, or will not be valid. Val-
id Data Ready in a high-impedance state indicates
that valid data is or will be available.
Unless Synchronous Burst Read has been select-
ed, Valid Data Ready is high-impedance. It may be
tied to other components with the same Valid Data
Ready signal to create a unique System Ready
signal.
The Valid Data Ready, R, output has an internal
pull-up resistor of approximately 1 M
from V
up resistor of the correct value to meet the external
timing requirements for Valid Data Ready rising.
Refer to Figure 19.
Status/(Ready/Busy) (STS). The STS signal is
an open drain output that can be used to identify
the Program/Erase Controller status. It can be
configured in two modes:
After power-up or reset the STS pin is configured
in Ready/Busy mode. The pin can be configured
for Status mode using the Configure STS com-
mand.
When the Program/Erase Controller is idle, or sus-
pended, STS can float High through a pull-up re-
sistor. The use of an open-drain output allows the
STS pins from several memories to be connected
to a single pull-up resistor (a Low will indicate that
one, or more, of the memories is busy).
12/61
Ready/Busy - the pin is Low, V
program and erase operations and high
impedance when the memory is ready for any
read, program or erase operation.
Status - the pin gives a pulsing signal to
indicate the end of a program or Block Erase
operation.
DDQ
, designers should use an external pull-
OL
, during
powered
STS is not Low during a reset unless the reset was
applied when the Program/Erase controller was
active. Ready/Busy can rise before Reset/Power-
Down rises.
Program/Erase Enable (V
Erase Enable input, V
blocks, preventing program and erase operations
from affecting their data.
Program/Erase Enable must be kept High during
all Program/Erase Controller operations, other-
wise the operations is not guaranteed to succeed
and data may become corrupt.
V
supply to the internal core of the memory device.
It is the main power supply for all operations
(Read, Program and Erase).
V
supply to the I/O pins and enables all Outputs to
be powered independently from V
tied to V
It is recommended to power-up and power-down
V
would result in data corruption.
V
the core power supply. It must be connected to the
system ground.
V
the input/output circuitry driven by V
must be connected to V
Note: Each device in a system should have
V
capacitor close to the pin (high frequency, in-
herently low inductance capacitors should be
as close as possible to the package). See
ure 10., AC Measurement Load
DD
DDQ
DD
SS
SSQ
DD
and V
Ground. Ground, V
Supply Voltage. V
and V
Ground. V
Supply Voltage. V
DD
DDQ
DDQ
or can use a separate supply.
together to avoid any condition that
decoupled with a 0.1µF ceramic
SSQ
ground is the reference for
PEN,
SS
DD
SS,
DDQ
.
PEN
is used to protect all
provides the power
is the reference for
provides the power
). The
DD
Circuit.
. V
DDQ
DDQ
Program/
. V
can be
Fig-
SSQ