K4X51163PE-L Datasheet, PDF (9/20 Pages) Samsung semiconductor – 32Mx16 Mobile DDR SDRAM

K4X51163PE - L(F)E/G
Mobile DDR SDRAM
9.3. Internal Temperature Compensated Self Refresh (TCSR)
1. In order to save power consumption, Mobile DDR SDRAM includes the internal temperature sensor and control units to control the self
refresh cycle automatically according to the two temperature ranges ; 45 °C and 85 °C.
2. If the EMRS for external TCSR is issued by the controller, this EMRS code for TCSR is ignored.
Self Refresh Current (IDD6)
-E
-G
Temperature Range
Unit
Full Array 1/2 Array 1/4 Array Full Array 1/2 Array 1/4 Array
45 °C¹⁾
85 °C
300
270
255
250
220
205
uA
600
500
450
500
400
350
NOTE :
1) It has +/- 5 °C tolerance.
9.4. Partial Array Self Refresh (PASR)
1. In order to save power consumption, Mobile DDR SDRAM includes PASR option.
2. Mobile DDR SDRAM supports three kinds of PASR in self refresh mode; Full array, 1/2 Array, 1/4 Array.
Figure 4. EMRS code and TCSR , PASR
BA1=0 BA1=0
BA0=0 BA0=1
BA1=0 BA1=0
BA0=0 BA0=1
BA1=0 BA1=0
BA0=0 BA0=1
BA1=1 BA1=1
BA0=0 BA0=1
- Full Array
BA1=1 BA1=1
BA0=0 BA0=1
- 1/2 Array
BA1=1 BA1=1
BA0=0 BA0=1
- 1/4 Array
Partial Self Refresh Area
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June 2007