HYB18L128160BC-7.5 QIMONDA [Qimonda AG], HYB18L128160BC-7.5 Datasheet - Page 38

• Manufacturer Part Number: HYB18L128160BC-7.5
• Description: DRAMs for Mobile Applications 128-Mbit Mobile-RAM
• Manufacturer: QIMONDA [Qimonda AG]

2.4.9
The Mobile-RAM requires a refresh of all rows in a rolling interval. Each refresh is generated in one of two ways:
by an explicit AUTO REFRESH command, or by an internally timed event in SELF REFRESH mode.
2.4.9.1
Figure 41
Auto Refresh is used during normal operation of the Mobile-RAM. The command is non persistent, so it must be
issued each time a refresh is required. A minimum row cycle time (t
commands. The same rule applies to any access command after the auto refresh operation. All banks must be
precharged prior to the AUTO REFRESH command.
The refresh addressing is generated by the internal refresh controller. This makes the address bits “Don’t Care”
during an AUTO REFRESH command. The Mobile-RAM requires AUTO REFRESH cycles at an average periodic
interval of 7.8 µs (max.). Partial array mode has no influence on auto refresh mode.
Figure 42
Data Sheet
AUTO REFRESH and SELF REFRESH
AUTO REFRESH
AUTO REFRESH Command
Auto Refresh
38
RC
) is required between two AUTO REFRESH
Functional DescriptionCommands
HY[B/E]18L128160B[C/F]-7.5
128-Mbit Mobile-RAM
05282004-NZNK-8T0D
Rev. 1.71, 2007-01