M95320-W STMICROELECTRONICS [STMicroelectronics], M95320-W Datasheet - Page 12

• Manufacturer Part Number: M95320-W
• Description: 32 Kbit and 64 Kbit Serial SPI bus EEPROMs with high speed clock
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Operating features
4.1.4
4.2
4.2.1
12/44
Power-down
At Power-down (continuous decrease of V
operating voltage to below the Power On Reset threshold voltage, the device stops
responding to any instruction sent to it.
During Power-down, the device must be deselected and in Standby Power mode (that is
there should be no internal Write cycle in progress). Chip Select (S) should be allowed to
follow the voltage applied on V
Active Power and Standby Power modes
When Chip Select (S) is Low, the device is selected, and in the Active Power mode. The
device consumes I
When Chip Select (S) is High, the device is deselected. If an Erase/Write cycle is not
currently in progress, the device then goes in to the Standby Power mode, and the device
consumption drops to I
Hold condition
The Hold (HOLD) signal is used to pause any serial communications with the device without
resetting the clocking sequence.
During the Hold condition, the Serial Data Output (Q) is high impedance, and Serial Data
Input (D) and Serial Clock (C) are Don’t Care.
To enter the Hold condition, the device must be selected, with Chip Select (S) Low.
Normally, the device is kept selected, for the whole duration of the Hold condition.
Deselecting the device while it is in the Hold condition, has the effect of resetting the state of
the device, and this mechanism can be used if it is required to reset any processes that had
been in progress.
The Hold condition starts when the Hold (HOLD) signal is driven Low at the same time as
Serial Clock (C) already being Low (as shown in
The Hold condition ends when the Hold (HOLD) signal is driven High at the same time as
Serial Clock (C) already being Low.
Figure 5
with Serial Clock (C) being Low.
Figure 5.
HOLD
C
also shows what happens if the rising and falling edges are not timed to coincide
Hold condition activation
CC
, as specified in
CC1
.
CC
Condition
.
Hold
Table 13
CC
), as soon as V
to
Figure
Table
M95320, M95640, M95320-x, M95640-x
17.
5).
CC
drops from the normal
Condition
Hold
AI02029D