PDF: 09005aef80be1ee8/Source: 09005aef80be1f7f Micron Technology, Inc., reserves the right to change products or specifications without notice.
AsyncCellularRAM_2.fm - Rev. G 10/05 EN
16 ©2003 Micron Technology, Inc. All rights reserved.
64Mb: 4 Meg x 16 Async/Page CellularRAM 1.0 Memory
Configuration Register Operation
DPD operation disables all refresh-related activity. This mode will be used when the sys-
tem does not require the storage provided by the CellularRAM device. Any stored data
will become corrupted when DPD is enabled. When refresh activity has been re-enabled,
the CellularRAM device will require 150µs to perform an initialization procedure before
normal operation can resume. DPD should not be enabled using CR software access.
Temperature-Compensated Refresh (CR[6:5]) Default = +85°C Operation
The TCR bits allow for adequate refresh at four different temperature thresholds: +15°C,
+45°C, +70°C, and +85°C. The setting selected must be for a temperature higher than the
case temperature of the CellularRAM device. If the case temperature is +50°C, the system
can minimize self refresh current consumption by selecting the +70°C setting. The +15°C
and +45°C settings would result in inadequate refreshing and cause data corruption.
Page Mode READ Operation (CR[7]) Default = Disabled
The page mode operation bit determines whether page mode READ operations are
enabled. In the power-up default state, page mode is disabled.
