參數資料
型號: EDD1232ABBH-5C-E
廠商: ELPIDA MEMORY INC
元件分類: DRAM
英文描述: 128M bits DDR SDRAM
中文描述: 4M X 32 DDR DRAM, 0.7 ns, PBGA144
封裝: ROHS COMPLIANT, FBGA-144
文件頁數: 25/51頁
文件大?。?/td> 518K
代理商: EDD1232ABBH-5C-E
EDD1232ABBH
Data Sheet E0874E40 (Ver. 4.0)
25
CK
/CK
VTT
VTT
DQS
DQ
CL = 3
Command
t0
t0.5
t1
t1.5
t2
t2.5
t3
t3.5
t4
t4.5
t5
t5.5
out0
out1
out2
out3
tRPST
tAC,tDQSCK
READ
NOP
tRPRE
Read Operation (/CAS Latency)
Write operation
The burst length (BL) and the burst type (BT) of the mode register are referred when a write command is issued.
The burst length (BL) determines the length of a sequential data input by the write command that can be set to 2, 4,
or 8. The latency from write command to data input is fixed to 1. The starting address of the burst read is defined by
the column address, the bank select address which are loaded via the A0 to A11, BA0 to BA1 pins in the cycle when
the write command is issued. DQS should be input as the strobe for the input-data and DM as well during burst
operation. tWPREH prior to the first rising edge of the DQS should be set to Low and tWPST after the last falling
edge of the data strobe can be set to High-Z. The leading low period of DQS is referred as write preamble. The last
low period of DQS is referred as write postamble.
in1
in0
in1
in2
in3
in0
in1
in2
in3
in4
in5
in6
in7
CK
/CK
Address
DQS
DQ
BL = 2
BL = 4
BL = 8
Command
BL: Burst length
t1
t0
t4
t4.5
t5
t6
t7
t8
t9
in0
ACT
NOP
NOP
NOP
WRITE
tWPREH
tWPRES
Row
Column
tRCDWR
tWPST
Write Operation
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