4
MOSEL VITELIC
V436516S04VATG-75
V436516S04VATG-75 Rev. 2.0 July 2001
Serial Presence Detect Information
A serial presence detect storage device -
E
2
PROM - is assembled onto the module. Informa-
tion about the module configuration, speed, etc. is
written into the E
2
PROM device during module pro-
duction using a serial presence detect protocol (I
2
C
synchronous 2-wire bus)
SPD-Table for PC133 modules:
Byte Number Function Described SPD Entry Value
Hex Value
16Mx64
0 Number of SPD bytes 128 80
1 Total bytes in Serial PD 256 08
2 Memory Type SDRAM 04
3 Number of Row Addresses (without BS bits) 12 0C
4 Number of Column Addresses (for x8 SDRAM) 10 0A
5 Number of DIMM Banks 1 01
6 Module Data Width 64 40
7 Module Data Width (continued) 0 00
8 Module Interface Levels LVTTL 01
9 SDRAM Cycle Time at CL=3 7.5 ns 75
10 SDRAM Access Time from Clock at CL=3 5.4 ns 54
11 Dimm Config (Error Det/Corr.) none 00
12 Refresh Rate/Type Self-Refresh, 15.6 µ s80
13 SDRAM width, Primary x8 08
14 Error Checking SDRAM Data Width n/a / x8 00
15 Minimum Clock Delay from Back to Back Random
Column Address
t
ccd
= 1 CLK 01
16 Burst Length Supported 1, 2, 4, 8 0F
17 Number of SDRAM Banks 4 04
18 Supported CAS
Latencies CL = 3 04
19 CS Latencies CS Latency = 0 01
20 WE Latencies WL = 0 01
21 SDRAM DIMM Module Attributes Non Buffered/Non Reg. 00
22 SDRAM Device Attributes: General Vcc tol ± 10% 0E
23 Minimum Clock Cycle Time at CAS
Latency = 2 Not Supported 00
24 Maximum Data Access Time from Clock for CL = 2 Not Supported 00
25 Minimum Clock Cycle Time at CL = 1 Not Supported 00
26 Maximum Data Access Time from Clock at CL = 1 Not Supported 00
27 Minimum Row Precharge Time 20 ns 14
28 Minimum Row Active to Row Active Delay t
RRD
15 ns 0F
29 Minimum RAS to CAS Delay t
RCD
20 ns 14
30 Minimum RAS Pulse Width t
RAS
45 ns 2D