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KM4132G271A-12 Datenblatt(PDF) 11 Page - Samsung semiconductor

Teilenummer KM4132G271A-12
Bauteilbeschribung  128K x 32Bit x 2 Banks Synchronous Graphic RAM
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Hersteller  SAMSUNG [Samsung semiconductor]
Direct Link  http://www.samsung.com/Products/Semiconductor
Logo SAMSUNG - Samsung semiconductor

KM4132G271A-12 Datenblatt(HTML) 11 Page - Samsung semiconductor

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KM4132G271A
CMOS SGRAM
Rev.0 (August 1997)
1. Apply power and start clock, Attempt to maintain CKE= "H", DQM= "H" and the other pins are NOP condition at the inputs.
2. Maintain stable power, stable clock and NOP input condition for a minimum of 200§Á.
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.
cf.) Sequence of 4 & 5 may be changed.
The device is now ready for normal operation.
Note : 1. If A9 is high during MRS cycle, "Burst Read Single Bit Write" function will be enabled.
2. The full column burst(256bit) is available only at Sequential mode of burst type.
3. If LC and LM both high(1), data of mask and color register will be unknown.
Register Programmed with MRS
(Note 1)
Address
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
Function
W.B.L
TM
CAS Latency
BT
Burst Length
(Note 2)
Test Mode
CAS Latency
Burst Type
Burst Length
A8
A7
Type
A6
A5
A4
Latency
A3
Type
A2
A1
A0
BT=0
BT=1
0
0
Mode Register Set
0
0
0
Reserved
0
Sequential
0
0
0
1
Reserved
0
1
Vendor
Use
Only
0
0
1
-
1
Interleave
0
0
1
2
Reserved
1
0
0
1
0
2
0
1
0
4
4
1
1
0
1
1
3
0
1
1
8
8
Write Burst Length
1
0
0
Reserved
1
0
0
Reserved
Reserved
A9
Length
1
0
1
Reserved
1
0
1
Reserved
Reserved
0
Burst
1
1
0
Reserved
1
1
0
Reserved
Reserved
1
Single Bit
1
1
1
Reserved
1
1
1
256(Full)
Reserved
Special Mode Register Programmed with SMRS
Address
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
Function
X
LC
LM
X
(Note 3)
Load Color
Load Mask
A6
Function
A5
Function
0
Disable
0
Disable
1
Enable
1
Enable
POWER UP SEQUENCE
MODE REGISTER FIELD TABLE TO PROGRAM MODES


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