HYB18L256160B QIMONDA [Qimonda AG], HYB18L256160B Datasheet - Page 40

• Manufacturer Part Number: HYB18L256160B
• Description: DRAMs for Mobile Applications 256-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
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 (
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.
Rev. 1.73, 2006-09
01302004-CZ2R-J9SE
t
RC
) is required between two AUTO REFRESH
AUTO REFRESH and SELF REFRESH
AUTO REFRESH
40
WRITE with Auto Precharge Interrupted by WRITE
HY[B/E]18L256160B[C/F]L-7.5
AUTO REFRESH Command
256-Mbit Mobile-RAM
FIGURE 40
FIGURE 41
Data Sheet