k4m51323pc-sc Samsung Semiconductor, Inc., k4m51323pc-sc Datasheet - Page 11

• Manufacturer Part Number: k4m51323pc-sc
• Description: Mobile-sdram
• Manufacturer: Samsung Semiconductor, Inc.

K4M51323PC-S(D)E/G/C/F
Partial Array Self Refresh
1. In order to save power consumption, Mobile SDRAM has PASR option.
2. Mobile SDRAM supports 3 kinds of PASR in self refresh mode : Full array, 1/2 of full array, 1/4 of full array
Temperature Compensated Self Refresh
Note :
1. In order to save power consumption, Mobile-SDRAM includes the internal temperature sensor and control units to control the
2. If the EMRS for external TCSR is issued by the controller, this EMRS code for TCSR is ignored.
3. It has +/- 5 qC tolerance.
B. POWER UP SEQUENCE
1. Apply power and attempt to maintain CKE at a high state and all other inputs may be undefined.
2. Maintain stable power, stable clock and NOP input condition for a minimum of 200us.
3. Issue precharge commands for all banks of the devices.
4. Issue 2 or more auto-refresh commands.
5. Issue a mode register set command to initialize the mode register.
6. Issue a extended mode register set command to define DS or PASR operating type of the device after normal MRS.
For operating with DS or PASR, set DS or PASR mode in EMRS setting stage.
In order to adjust another mode in the state of DS or PASR mode, additional EMRS set is required but power up sequence is not
needed again at this time. In that case, all banks have to be in idle state prior to adjusting EMRS set.
- Apply VDD before or at the same time as VDDQ.
self refresh cycle automatically according to the two temperature range ; 45 qC and 85 qC(for Extended) / 70 qC(for Commercial).
Temperature Range
85/70 qC
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45 qC
BA1=0
BA0=0
BA1=1
BA0=0
- Full Array
*3
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BA1=0
BA0=1
BA1=1
BA0=1
Full Array
300
600
1/2 Array
- E / C
270
500
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BA1=0
BA0=0
BA1=1
BA0=0
- 1/2 Array
Self Refresh Current (IDD6)
1/4 Array
255
450
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BA1=1
BA0=1
BA1=0
BA0=1
Full Array
250
500
1/2 Array
- G / F
220
400
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- 1/4 Array
Mobile-SDRAM
1/4 Array
Partial Self Refresh Area
205
350
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February 2006
Unit
uA