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H55S1G22MFP-75 数据表(PDF) 36 Page - Hynix Semiconductor

部件名 H55S1G22MFP-75
功能描述  1Gb (32Mx32bit) Mobile SDRAM
Download  53 Pages
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制造商  HYNIX [Hynix Semiconductor]
网页  http://www.skhynix.com/kor/main.do
标志 HYNIX - Hynix Semiconductor

H55S1G22MFP-75 数据表(HTML) 36 Page - Hynix Semiconductor

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Rev 1.2 / Jun. 2008
36
11
1Gbit (32Mx32bit) Mobile SDR Memory
H55S1G(2/3)2MFP Series
WRITE to READ
The preceding burst write operation can be aborted and a new burst read operation can be started by inputting a new
read command in the write cycle. The data of the read command (READ) is output after the lapse of the /CAS latency.
The preceding write operation (WRIT) writes only the data input before the read command.
The data bus must go into a high-impedance state at least one cycle before output of the latest data.
Notes:
1. Same bank, same ROW address: When the read command is executed at the same ROW address of the same bank
as the preceding write command, the read command can be performed after an interval of no less than 1 clock.
However, in the case of a burst write, data will continue to be written until one clock before the read command is
executed.
2. Same bank, different ROW address: When the ROW address changes, consecutive read commands cannot be
executed; it is necessary to separate the two commands with a precharge command and a bank active command.
3. Different bank: When the bank changes, the read command can be performed after an interval of no less than 1
clock, provided that the other bank is in the bank active state. However, in the case of a burst write, data will
continue to be written until one clock before the read command is executed (as in the case of the same bank
and the same address).
CLK
Don't Care
DQ
WRITE
READ
Command
BA, Col
b
Address
DQ
DI
b0
DI
b1
DO
n0
DO
n2 DOn3
BL = 4
DO
n1
DI
b0
DI
b1
BL = 4
CL = 3
BA, Col
n
CL = 2
DO
n0
DO
n2 DOn3
DO
n1


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