V436632Z24V
written into the E
2
PROM device during module pro-
duction using a serial presence detect protocol (I
2
C
synchronous 2-wire bus)
A serial presence detect storage device -
2
PROM - is assembled onto the module. Informa-
E
tion about the module configuration, speed, etc. is
CILETIV LESO M
Serial Presence Detect Information
SPD-Table
Byte
Number
0
1
2
3
4
Hex Value
Function Described
Number of SPD bytes
Total bytes in Serial PD
Memory Type
Number of Row Addresses (without BS bits)
Number of Column Addresses (for x8
SDRAM)
Number of DIMM Banks
Module Data Width
Module Data Width (continued)
Module Interface Levels
SDRAM Cycle Time at CL=3
SDRAM Access Time from Clock at CL=3
Dimm Config (Error Det/Corr.)
Refresh Rate/Type
SDRAM width, Primary
Error Checking SDRAM Data Width
Minimum Clock Delay from Back to Back
Random Column Address
Burst Length Supported
Number of SDRAM Banks
Supported CAS Latencies
CS Latencies
WE Latencies
SDRAM DIMM Module Attributes
SDRAM Device Attributes: General
Minimum Clock Cycle Time at CAS Latency
=2
Maximum Data Access Time from Clock for
CL = 2
Minimum Clock Cycle Time at CL = 1
Maximum Data Access Time from Clock at
CL = 1
Minimum Row Precharge Time
SPD Entry Value
128
256
SDRAM
13
10
-75PC
80
08
04
0D
0A
-75
80
08
04
0D
0A
-10PC
80
08
04
0D
0A
5
6
7
8
9
10
11
12
13
14
15
1
64
0
LVTTL
7.5 ns/10.0 ns
5.4 ns/6.0 ns
none
Self-Refresh,7.8µs
x8
n/a / x8
t
ccd
= 1 CLK
1, 2, 4 & 8
4
CL =2, 3
CS Latency = 0
WL = 0
Non Buffered/Non Reg.
Vcc tol ± 10%
7.5 ns/10.0 ns
01
40
00
01
75
54
00
82
08
00
01
01
40
00
01
75
54
00
82
08
00
01
01
40
00
01
A0
60
00
82
08
00
01
16
17
18
19
20
21
22
23
0F
04
06
01
01
00
0E
75
0F
04
06
01
01
00
0E
A0
0F
04
06
01
01
00
0E
A0
24
5.4 ns/6.0 ns
54
60
60
25
26
Not Supported
Not Supported
00
00
00
00
00
00
27
15 ns/20 ns
0F
14
14
V436632Z24V Rev. 1.1 February 2002
4
MOSEL [ MOSEL VITELIC, CORP ]
