m95320 STMicroelectronics, m95320 Datasheet - Page 12

• Manufacturer Part Number: m95320
• Description: 32 Kbit And 64 Kbit Serial Spi Bus Eeproms With High Speed Clock
• Manufacturer: STMicroelectronics

Operating features
4
4.1
4.1.1
4.1.2
4.1.3
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Operating features
Supply voltage (V
Operating supply voltage V
Prior to selecting the memory and issuing instructions to it, a valid and stable V
within the specified [V
Table
V
V
This voltage must remain stable and valid until the end of the transmission of the instruction
and, for a Write instruction, until the completion of the internal write cycle (t
Power-up conditions
When the power supply is turned on, V
time, the Chip Select (S) line is not allowed to float but should follow the V
therefore recommended to connect the S line to V
In addition, the Chip Select (S) input offers a built-in safety feature, as the S input is edge
sensitive as well as level sensitive: after power-up, the device does not become selected
until a falling edge has first been detected on Chip Select (S). This ensures that Chip Select
(S) must have been high, prior to going low to start the first operation.
The V
Device reset
In order to prevent inadvertent Write operations during power-up (continuous rise of V
power on reset (POR) circuit is included. At power-up, the device will not respond to any
instruction until V
lower than the minimum V
Until V
the POR threshold, the device is in the following state:
●
●
●
●
CC
CC
/V
line with a suitable capacitor (usually of the order of 10 nF to 100 nF) close to the
Standby Power mode
deselected (at next power-up, a falling edge is required on Chip Select (S) before any
instruction can be started)
not in the Hold condition
Status register
–
–
–
10). In order to secure a stable DC supply voltage, it is recommended to decouple the
CC
SS
CC
package pins.
rise time must not vary faster than 1 V/µs.
the Write Enable Latch (WEL) bit is reset to 0
the Write In Progress (WIP) bit is reset to 0
the SRWD, BP1 and BP0 bits of the Status Register are in the same state as when
power was last removed (they are non-volatile bits).
passes over the POR threshold, the device is reset. Once V
CC
has reached the power on reset threshold voltage (this threshold is
CC
(min), V
CC
CC
operating voltage defined in
)
CC
CC
(max)] range must be applied (see
CC
continuously rises from V
CC
M95320, M95640, M95320-x, M95640-x
via a suitable pull-up resistor.
Table
8,
Table 9
SS
CC
Table
to V
has passed over
CC
and
CC
W
8,
).
voltage, it is
. During this
Table
Table 9
CC
voltage
10).
CC
and
), a