k4x56163pe-lg Samsung Semiconductor, Inc., k4x56163pe-lg Datasheet - Page 12
k4x56163pe-lg
Manufacturer Part Number
k4x56163pe-lg
Description
16m X16 Mobile Ddr Sdram
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.K4X56163PE-LG.pdf
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Essential Functionality for DDR SDRAM
The essential functionality that is required for the DDR SDRAM device is described in this chapter
K4X56163PE-L(F)G
Burst Read Operation
Burst Read operation in DDR SDRAM is in the same manner as the SDRAM such that the Burst read command is issued by assert-
ing CS and CAS low while holding RAS and WE high at the rising edge of the clock(CK) after tRCD from the bank activation. The
address inputs (A0~A9) determine the starting address for the Burst. The Mode Register sets type of burst(Sequential or interleave)
and burst length(2, 4, 8). The first output data is available after the CAS Latency from the READ command, and the consecutive data
are presented on the falling and rising edge of Data Strobe(DQS) adopted by DDR SDRAM until the burst length is completed.
CAS Latency=3
Command
< Burst Length=4, CAS Latency= 3 >
DQS
DQs
CK
CK
READ A
0
NOP
1
Figure.5 Burst read operation timing
Preamble
NOP
t
RPRE
2
t
SAC
Dout 0 Dout 1 Dout 2 Dout 3
NOP
3
12
NOP
4
t
RPST
Postamble
NOP
5
Mobile-DDR SDRAM
NOP
6
NOP
7
NOP
March 2004
8
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