參數(shù)資料
型號(hào): HYB18T512800AF-5
廠(chǎng)商: INFINEON TECHNOLOGIES AG
英文描述: 512-Mbit Double-Data-Rate-Two SDRAM
中文描述: 512兆雙數(shù)據(jù)速率2內(nèi)存
文件頁(yè)數(shù): 38/96頁(yè)
文件大?。?/td> 1571K
代理商: HYB18T512800AF-5
HYB18T512[400/800/160]A[C/F]–[3.7/5]
512-Mbit Double-Data-Rate-Two SDRAM
Functional Description
Data Sheet
38
Rev. 1.13, 2004-05
09112003-SDM9-IQ3P
Figure 20
Read to Write Timing Example : Read followed by a write to the same bank, Activate to Read
delay <
t
RCDmin
: AL = 2 and CL = 3, RL = (AL + CL) = 5, WL = (RL -1) = 4, BL = 8
Figure 21
Read to Write Timing Example : Read followed by a write to the same bank, Activate to Read
delay =
t
RCDmin
: AL = 0, CL = 3, RL = (AL + CL) = 3, WL = (RL -1) = 2, BL = 4
Figure 22
Read to Write Timing Example : Read followed by a write to the same bank, Activate to Read
delay >
t
RCDmin
: AL = 1, CL = 3, RL = 4, WL = 3, BL = 4
2.6.2
Burst mode operation is used to provide a constant flow
of data to memory locations (write cycle), or from
memory locations (read cycle). The parameters that
define how the burst mode will operate are burst
sequence and burst length. The DDR2 SDRAM
supports 4 bit and 8 bit burst modes only. For 8 bit burst
Burst Mode Operation
mode, full interleave address ordering is supported,
however, sequential address ordering is nibble based
for ease of implementation. The burst length is
programmable and defined by the addresses A[2:0] of
the MRS. The burst type, either sequential or
interleaved, is programmable and defined by the
Bank A
tRCD
CL = 3
AL = 2
RL = AL + CL = 5
WL = RL -1 = 4
PostCAS3
CMD
DQ
DQS,
DQS
CK, CK
0
2
3
4
5
1
6
7
8
9
10
11
Read
Write
Din0
Din1
Din2
Din3
Dout0
Dout1
Dout2
Dout3
Dout4
Dout5
Dout6
Dout7
12
Activate
Read
Write
tRCD
CL = 3
AL = 0
RL = AL + CL = 3
WL = RL -1 = 2
PostCAS2
CMD
DQ
DQS,
DQS
CK, CK
0
2
3
4
5
1
6
7
8
9
10
11
Dout0
Dout1
Dout2
Dout3
Din0
Din1
Din2
Din3
Bank A
tRCD > tRCDmin.
RL = 4
WL = 3
PostCAS5
CMD
DQ
DQS,
DQS
CK, CK
0
2
3
4
5
1
6
7
8
9
10
11
Read
Dout0
Dout1
Dout2
Dout3
Din0
Din1
Din2
Din3
Write
Bank A
12
13
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