參數(shù)資料
型號(hào)： K4C561638C-TCD4
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： Aluminum Electrolytic Radial Lead High Ripple, Long Life Capacitor; Capacitance: 33uF; Voltage: 200V; Case Size: 12.5x20 mm; Packaging: Bulk
中文描述： 256Mb的網(wǎng)絡(luò)內(nèi)存
文件頁(yè)數(shù)： 39/42頁(yè)
文件大?。?/td> 880K
代理商： K4C561638C-TCD4
K4C5608/1638C 256Mb Network-DRAM
REV. 0.7 Aug. 2003
- 39 -
Power Down Mode( PD="L" )
When all banks are in the idle state and all outputs are in Hi-Z states, the K4C560838/1638C-TC become Power Down Mode by
asserting PD is "Low". When the device enters the Power Down Mode, all input and output buffers except for PD are disabled after
specified time. Therefore, the power dissipation lowers. To exit the Power Down Mode, PD has to be brought to "High" and the DESL
command has to be issued at next CK rising edge after PD goes high. The Power Down exit function is asynchronous operation.
Mode Register Set (1st command + 2nd command = RDA + MRS)
When all banks are in the idle state, issuing the MRS command following to the RDA command can program the Mode Register. In a
point to notice, the read mode started with the RDA command is canceled by the MRS command having gone into the next clock of the
RDA command instead of the LAL command. The data to be set in the Mode Register is transferred using A0 to A14, BA0 and BA1
address inputs. The K4C560838/1638C-TC have two mode registers. These are Regule and Extended Mode Register. The Regular or
Extended Mode Register is chosen by BA0 in the MRS command.The Regular Mode Register designates the operation mode for a
read or write cycle. The Regular Mode Register has four function fields.
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.
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.
相關(guān)PDF資料
PDF描述
K4C561638C-TCD4000 Aluminum Electrolytic Radial Lead High Ripple, Long Life Capacitor; Capacitance: 47uF; Voltage: 200V; Case Size: 12.5x20 mm; Packaging: Bulk
K4C561638C-TCDA 256Mb Network-DRAM
K4C89323AF-GCF5 2,097,152-WORDS x 4 BANKS x 36-BITS DOUBLE DATA RATE Network-DRAM
K4C89323AF-GCF6 2,097,152-WORDS x 4 BANKS x 36-BITS DOUBLE DATA RATE Network-DRAM
K4C89323AF-GCFB 2,097,152-WORDS x 4 BANKS x 36-BITS DOUBLE DATA RATE Network-DRAM
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K4C561638C-TCDA 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:256Mb Network-DRAM
K4C89083AF-ACF5 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:288Mb x18 Network-DRAM2 Specification
K4C89083AF-ACF6 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:288Mb x18 Network-DRAM2 Specification
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