DDR SD RAM 램의 구조
DDR(Double DATA Rate) -SDRAM의 외형상의 모습은 기존 SDRAM과 다르게
184핀의 다소 많은 핀수를 가지고 있으며,
노치(Notch : 핀부분의 홈)가 SDRAM의 두 개에 비해 한 개의 노치만을
가지고 있습니다.
상단에 표기한 내용 같이 스티커를 통해 메모리를 구분할수 있으며
규격에 맞는 메인보드를 사용하셔야 합니다
1. Memory Module(M)
2. Module Configuration
3 : 4/8 Byte DIMM(100, 168, 200, 232, 278pin)
4 : 8 Byte SODIMM(144pin)
8 : 4 Byte AIMM(132pin)
3. 4. Data bits
20 : x72/ECC PLL+Register DIMM with PPD
23 : x144/ECC PLL+Register DIMM
32 : x32 AIMM w/o SPD
45 : x144/ECC PLL+Register DIMM for 200pin(SGI)
50 : x72/ECC w/o PLL+Register DIMM with SPD for 168pin(Intel)
63 : x64 micro DIMM with SPD
64 : x64 PC100 SODIMM with SPD
65 : x64 168pin w/o SPD(Old JEDEC)
66 : x64 U-DIMM/SODIMM with SPD
74 : x72/ECC U-DIMM with SPD
75 : x72/ECC PLL+Register DIMM with SPD for 168pin(JEDEC)
77 : x72/ECC PLL+Register DIMM with SPD for 168pin(Intel)
78 : x72/ECC PLL+Register DIMM with SPD for 200pin(JEDEC)
79 : x72/ECC PLL+Register DIMM with PPD for 200pin(SGI)
81 : x72/ECC U-DIMM for 200pin(IBM)
90 : x72/ECC PLL+Register DIMM with SPD for 168pin(RCC)
5. Feature,Voltage
S : SDRAM.3.3V
6. 7. Depth
01 : 1M 02 : 2M
04 : 4M 08 : 8M
09 : 8M(for 128Mb/512Mb) 12 : 96M
16 : 16M 17 : 16M(for 128Mb/512Mb)
28 : 128M 29 : 128M(for 128Mb/512Mb)
32 : 32M 33 : 32M(for 128Mb/512Mb)
56 : 256M 64 : 64M
65 : 64M(for 128Mb/512Mb)
8. Refresh,# of banks,Interface
0 : 4K/64ms Ref., 2Bank, LVTTL
1 : 2K/32ms Ref., 2Bank, LVTTL
2 : 4K/64ms Ref., 4Bank, LVTTL
3 : 4K/64ms Ref., 2Bank, SSTL
5 : 8K/64ms Ref., 4Bank, LVTTL
9. Composition Component
0 : x4
3 : x8
4 : x16
5 : x32
6 : x16+x32
7 : x4 Stack(Uniframe)
8 : x4 Stack(Flexframe)
9 : x8 Stack(Flexframe)
10. Generation
M : 1st Generation
A : 2nd Generation
B : 3rd Generation
C : 4th Generation
D : 5th Generation
E : 6th Generation
F : 7th Generation
11. Package
G : CSP(→UBGA, WBGA) L : LSSOP
N : STSOP2-400 K : TSOP2-400 for DDP
O : TSOP2-400-LF T : TSOP2-400
U : TSOP2-400F-LF
12. Package
0 : None
1 : 1st Rev.
2 : 2nd Rev. 3 : 3rd Rev.
C : CPQ 200pin 133MHz F : PC66 4Layer
H : HP M : IBM
N : NOKIA P : for Apple 1.15inch U-DIMM
R : for SUN 2.5inch NGDIMM Q : COMPAQ
S : PC100 4Layer U : Intel 1U DIMM
Y : SONY L : PC66
13. " - "
14. Power
C : Normal Power, Self Ref.
L : Low Power, Self Ref.
15. 16. Speed(tCC : Default CL3)
10 : 10ns PC66 12 : 12ns
15 : 15ns 1H : 10ns @CL2 PC100
1L : 10ns PC100 50 : 5ns
60 : 6ns 70 : 7ns
75 : 7.5ns PC133 7A : PC133 3-3-3 + PC100 2-2-2
7B : PC133 3-2-2 + PC100 2-2-2 7C : 7.5ns PC133 2-2-2 80 : 8ns
80 : 8ns
17. 18. Customer(Special Handling) "Customer List Reference"
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