128Mb DDR SDRAM - Samsung
Description
128Mb DDR SDRAM
DDR SDRAM Specification Version 1.
0
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REV.
1.
0 November.
2.
2000
128Mb DDR SDRAM
Revision History
Version 0 (May, 1998) - First version for internal review Version 0.
1(June, 1998) - Added x4 organization Version 0.
2(Sep,1998) 1.
Added "Issue prcharge command for all banks of the device" as the fourth step of power-up squence.
2.
In power down mode timing diagram, NOP condition is added to precharge power down exit.
Version 0.
3(Dec,1998) - Added QFC Function.
- Added DC current value - Reduce I/O capacitance values Version 0.
4(Feb,1999) -Added DDR SDRAM history for reference(refer to the following page) -Added low power version DC spec Version 0.
5(Apr,1999) -Revised following first showing for JEDEC standard -Added DC target current based on new DC test condition Version 0.
6(July 1,1999) 1.
Modified binning policy From To -Z (133Mhz) -Z (133Mhz/266Mbps@CL=2) -8 (125Mhz) -Y (133Mhz/266Mbps@CL=2.
5) -0 (100Mhz) -0 (100Mhz/200Mbps@CL=2) 2.
Modified the following AC spec values From.
-Z tAC tDQSCK tDQSQ tDS/tDH tCDLR*1 tPRE
*1
To.
-0 +/- 1ns +/- 1ns +/- 0.
75ns 0.
75 ns 2.
5tCK-tDQSS 1tCK +/- 1ns tCK/2 +/- 1ns tCK/2 +/- 1ns -Z +/- 0.
75ns +/- 0.
75ns +/- 0.
5ns 0.
5 ns 1tCK 0.
9/1.
1 tCK 0.
4/0.
6 tCK +/- 0.
75ns -Y +/- 0.
75ns +/- 0.
75ns +/- 0.
5ns 0.
5 ns 1tCK 0.
9/1.
1 tCK 0.
4/0.
6 tCK +/- 0.
75ns -0 +/- 0.
8ns +/- 0.
8ns +/- 0.
6ns 0.
6 ns 1tCK 0.
9/1.
1 tCK 0.
4/0.
6 tCK +/-0.
8ns
+/- 0.
75ns +/- 0.
75ns +/- 0.
5ns 0.
5 ns 2.
5tCK-tDQSS 1tCK +/- 0.
75ns tCK/2 +/- 0.
75ns tCK/2 +/- 0.
75ns
tRPST*1 tHZQ
*1 *1
: Changed description method for the same functionality.
This means no difference from the previous version.
3.
Changed the following AC parameter symbol From.
To.
Output data access time from CK/CK tDQCK tAC Version 0.
61(August 9,1999) - Changed the some values of "write with auto precharge" table for different bank in page 31.
Asserted command Old Read Read + AP*1 Legal Legal For Different Bank 3 New Illegal Illegal Old Legal Legal 4 New Illegal Illegal
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0 N...
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