MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 200

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Static Random Access Memory (SRAM)
9.3 Modes of Operation
9.4 Low-Power Modes
9.5 Standby Power Supply Pin (V
9.6 Standby Operation
Advance Information
200
NOTE:
Access to the SRAM is not restricted in any way. The array can be
accessed in supervisor and user modes.
The MMC2113 may contain more than 8K of internal SRAM, but only the
8K range from 0x0080_0000 to 0x0080_1fff is tested and guaranteed to
be operational. It is recommended that internal SRAM outside this range
not be used. Accesses to SRAM outside this range terminate without a
transfer error exception.
In wait, doze, and stop modes, clocks to the SRAM are disabled. No
recovery time is required when exiting these modes.
The standby power supply pin (V
SRAM 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
Freescale Semiconductor, Inc.
For More Information On This Product,
Static Random Access Memory (SRAM)
Go to: www.freescale.com
DD
STBY
STBY
is lost. V
may exceed its specified maximum value at some
STBY
)
STBY
pin should be connected to V
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
STBY
is isolated from all other V
DD
) provides standby voltage to the
is below the voltage on V
STBY
DD
SS
. If the standby voltage
is at or below the
. If the standby power
STBY
above the
DD
DD
.
MOTOROLA
nodes.
STBY
.