m95320 STMicroelectronics, m95320 Datasheet - Page 13

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

M95320, M95640, M95320-x, M95640-x
4.1.4
4.2
4.2.1
Power-down
At power-down (continuous decrease in V
operating voltage to below the power on reset threshold voltage, the device is reset and
stops responding to any instruction sent to it. During power-down, the device must be
deselected (Chip Select (S) should be allowed to follow the voltage applied on V
Standby Power mode (that is there must be no internal Write cycle in progress).
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 a 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
CC1
Hold condition activation
.
CC
, as specified in
Condition
Hold
Table 13
CC
), as soon as V
to
Figure
Table
16.
5).
CC
drops from the normal
Condition
Hold
Operating features
CC
) and in
AI02029D
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