MMCCMB2107 Freescale, MMCCMB2107 Datasheet - Page 176

• Manufacturer Part Number: MMCCMB2107
• Manufacturer: Freescale

Specifications of MMCCMB2107

• Lead Free Status / RoHS Status: Not Compliant

Static Random-Access Memory (SRAM)
8.4 Low-Power Modes
8.5 Standby Power Supply Pin (V
8.6 Standby Operation
Technical Data
176
In wait, doze, and stop modes, clocks to the SRAM are disabled. No
recovery time is required when exiting any low-power mode.
The standby power supply pin (V
RAM array if V
When the chip is powered down, the contents of the SRAM array are
maintained by the standby power supply, V
falls below the minimum required voltage, the SRAM contents may be
corrupted. The SRAM automatically switches to standby operation with
no loss of data when the voltage on V
In standby mode, the SRAM does not respond to any bus cycles.
Unexpected operation may occur if the central processor unit (CPU)
requests data from the SRAM in standby mode. If standby operation is
not needed, then the V
The current on V
time during the transition time during which V
voltage switch threshold to a threshold above V
supply cannot provide enough current to maintain V
required minimum value, then a capacitor must be provided from V
to V
where:
I is the difference between the transition current requirement and the
maximum power supply current,
t is the duration of the V
threshold, and
V is the difference between the minimum available supply voltage and
the required minimum V
Freescale Semiconductor, Inc.
SS
For More Information On This Product,
. The value of the capacitor, C, can be calculated as:
Static Random-Access Memory (SRAM)
Go to: www.freescale.com
DD
STBY
is lost. V
STBY
may exceed its specified maximum value at some
STBY
)
STBY
DD
STBY
pin should be connected to V
transition near the voltage switch
C
is isolated from all other V
voltage.
STBY
=
I
DD
) provides standby voltage to the
--- -
V
t
is below the voltage on V
STBY
DD
SS
. If the standby voltage
is at or below the
. If the standby power
STBY
MMC2107 – Rev. 2.0
above the
DD
DD
.
MOTOROLA
nodes.
STBY
STBY
.