k4x56163pe-lg Samsung Semiconductor, Inc., k4x56163pe-lg Datasheet - Page 10
k4x56163pe-lg
Manufacturer Part Number
k4x56163pe-lg
Description
16m X16 Mobile Ddr Sdram
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.K4X56163PE-LG.pdf
(48 pages)
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K4X56163PE-L(F)G
Precharge
The precharge command is used to precharge or close a bank that has been activated. The precharge command is issued when CS,
RAS and WE are low and CAS is high at the rising edge of the clock. The precharge command can be used to precharge each bank
respectively or all banks simultaneously. The bank select addresses(BA0, BA1) are used to define which bank is precharged when
the command is initiated. For write cycle, tWR(min.) must be satisfied until the precharge command can be issued. After tRP from
the precharge, an active command to the same bank can be initiated.
Bank selection for precharge by Bank address bits
No Operation(NOP) & Device Deselect
The device should be deselected by deactivating the CS signal. In this mode DDR SDRAM should ignore all the control inputs. The
DDR SDRAMs are put in NOP mode when CS is active and by deactivating RAS, CAS and WE. Both Device Deselect and NOP com-
mand can not affect operation already in progress. So even if the device is deselected or NOP command is issued under operation,
operation will be complete.
A10/AP
0
0
0
0
1
BA1
X
0
0
1
1
10
BA0
X
0
1
0
1
Mobile-DDR SDRAM
Bank A Only
Bank B Only
Bank C Only
Bank D Only
Precharge
All Banks
March 2004
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