參數(shù)資料
型號(hào)： K4C89183AF-GCFB
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： 288Mb x18 Network-DRAM2 Specification
中文描述： 288Mb x18網(wǎng)絡(luò)DRAM2規(guī)范
文件頁(yè)數(shù)： 51/55頁(yè)
文件大?。?/td> 1470K
代理商： K4C89183AF-GCFB
K4C89183AF
- 51 -
REV. 0.7 Jan. 2005
The four fields are as follows :
(R-1) Burst Length field to set the length of burst data
(R-2) Burst Type field to designate the lower address access sequence in a burst cycle
(R-3) CAS Latency field to set the access time in clock cycle
(R-4) Test Mode field to use for supplier only.
The Extended Mode Register has two function fields.
The two fields are as follows:
(E-1) DLL Switch field to choose either DLL enable or DLL disable
(E-2) Output Driver Impedance Control field.
(E-3) Data Strobe Select
Once these fields in the Mode Register are set up, the register contents are maintained until the Mode Register is set up again by
another MRS command or power supply is lost. The initial value of the Regular or Extended Mode Register after power-up is unde-
fined, therefore the Mode Register Set command must be issued before proper operation.
Regular Mode Register/Extended Mode Register change bits (BA0, BA1)
These bits are used to choose either Regular MRS or Extended MRS
Regular Mode Register Fields
(R-1) Burst Length field (A2 to A0)
This field specifies the data length for column access using the A2 to A0 pins and sets the Burst Length to be 4 words.
(R-2) Burst Type field (A3)
This Burst Type can be chosen Interleave mode or Sequential mode. When the A3 bit is " 0", Sequential mode is
selected. When the A3 bit is "1", Interleave mode is selected. Both burst types support burst length of 2 and 4 words.
Addressing sequence of Sequential mode (A3)
A column access is started from the inputted lower address and is performed by incrementing the lower address input to
the device.
BA1
0
0
1
BA0
0
1
X
A14~A0
Regular MRS cycle
Extended MRS cycle
Reserved
A2
0
0
0
0
1
A1
0
0
1
1
X
A0
0
1
0
1
X
Burst Length
Reserved
Reserved
4 words
Reserved
Reserved
A3
0
1
Burst Type
Sequential
Interleave
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