SM4M64DT-10 Enhanced Memory Systems, Inc., SM4M64DT-10 Datasheet - Page 10

• Manufacturer Part Number: SM4M64DT-10
• Description: 168-pin Enhanced SDRAM DIMM 32MB DIMM
• Manufacturer: Enhanced Memory Systems, Inc.

168-pin Enhanced SDRAM DIMM
8MB, 16MB, 32MB DIMM
Serial Presence Detect (SPD) for PC-133 DIMMs
Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921
PHONE: (800) 545-DRAM; FAX: [phone];
Page 10 of 13
Continued from last page.
Byte Description
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
0
1
2
3
4
5
6
7
8
9
Number of bytes written into
EEPROM
Total number of SPD bytes
Memory Type
Number of Row Addresses
Number of Column Addresses
Number of Module Banks
Module Data Width
Module Data Width (cont’d)
Voltage Interface Levels
Cycle Time at max CAS
Latency
ESDRAM Clock Access
Time
DIMM config (non-parity, parity,
ECC)
Refresh Rate and Type
Primary ESDRAM Width
Error Checking Data Width
Min. CAS-to-CAS Delay (tCCD)
Burst Lengths Supported
Number of Banks on ESDRAM
Device
CAS Latencies Supported
CS Latency
Write Latency
ESDRAM Module Attributes
ESDRAM Device Attributes
Min. Clock Cycle Time at
CL=2
Clock Access Time at CL=2
(tAC2)
Min. Clock Cycle Time at
CL=1
Clock Access Time at CL=1
(tAC1)
http://www.edram.com
-7.5
-7.5
-7.5
-7.5
-7.5
-7.5
-10
-10
-10
-10
-10
-10
SDRAM
10.0 ns
10.0 ns
15.0 ns
20.0 ns
12.0 ns
15.0 ns
LVTTL
7.5 ns
4.5 ns
5.0 ns
7.5 ns
4.5 ns
5.0 ns
Early RAS Precharge, +/-10% Vdd,
8MB
1,2,3
1 clk
128
256
x64
x16
N/A
11
8
1
0
2
0
0
--- 1,2,4,8,Full Pg ---
--- 31.25us / Self ---
--- Unbuffered ---
--- Non-parity ---
Precharge All
SPD Entry
SDRAM
10.0 ns
10.0 ns
15.0 ns
20.0 ns
12.0 ns
15.0 ns
16MB
LVTTL
7.5 ns
4.5 ns
5.0 ns
7.5 ns
4.5 ns
5.0 ns
1,2,3
1 clk
128
256
N/A
x64
11
x8
9
1
0
2
0
0
SDRAM
10.0 ns
10.0 ns
15.0 ns
20.0 ns
12.0 ns
15.0 ns
32MB
LVTTL
7.5 ns
4.5 ns
5.0 ns
7.5 ns
4.5 ns
5.0 ns
1,2,3
1 clk
The information contained herein is subject to change without notice.
128
256
x64
N/A
11
x8
9
2
0
2
0
0
1999 Enhanced Memory Systems. All rights reserved.
8MB
0B
A0
A0
3C
3C
80
08
04
08
01
40
00
01
75
45
50
00
83
10
00
01
8F
02
07
01
01
00
07
75
45
50
50
30
Continued on next page.
** Hex Code **
Preliminary Data Sheet
16MB
0B
A0
8F
A0
3C
3C
80
08
04
09
01
40
00
01
75
45
50
00
83
08
00
01
02
07
01
01
00
07
75
45
50
50
30
32MB
Revision 3.1
3C
3C
0B
A0
8F
A0
80
08
04
09
02
40
00
01
75
45
50
00
83
08
00
01
02
07
01
01
00
07
75
45
50
50
30