PC100 SDRAM Unbuffered DIMM
HYM7V65801B F-Series
Rev. 1.1/Apr.01
SERIAL PRESENCE DETECT
BYTE FUNCTION FUNCTION VALUE
NUMBER DESCRIBED -8 -10P -10S -8 -10P -10S NOTE
BYTE0 # of Bytes Written into Serial Memory
at Module Manufacturer 128 Bytes 80h
BYTE1 Total # of Bytes of SPD Memory Device 256 Bytes 08h
BYTE2 Fundamental Memory Type SDRAM 04h
BYTE3 # of Row Addresses on This Assembly 12 0Ch 1
BYTE4 # of Column Addresses on This Assembly 9 09h
BYTE5 # of Module Banks on This Assembly 1 Banks01h
BYTE6 Data Width of This Assembly 64 Bits 40h
BYTE7 Data Width of This Assembly (Continued) -00h
BYTE8 Voltage Interface Standard of This Assembly LVTTL 01h
BYTE9 SDRAM Cycle Time @ /CAS Latency=3 8ns 10ns 10ns 80h A0h A0h
BYTE10 Access Time from Clock @ /CAS Latency=3 6ns 6ns 6ns 60h 60h 60h
BYTE11 DIMM Configuration Type None 00h
BYTE12 Refresh Rate/Type 15.625µs
/ Self Refresh Supported 80h
BYTE13 Primary SDRAM Width x8 08h
BYTE14 Error Checking SDRAM Width None 00h
BYTE15 Minimum Clock Delay Back to Back Random
Column Address tCCD = 1 CLK 01h
BYTE16 Burst Lengths Supported 1,2,4,8,Full Page 8Fh 2
BYTE17 # of Banks on Each SDRAM Device 4 Banks 04h
BYTE18 SDRAM Device Attributes, CAS # Latency /CAS Latency=2,3 06h
BYTE19 SDRAM Device Attributes, CS # Latency /CS Latency=0 01h
BYTE20 SDRAM Device Attributes, Write Latency /WE Latency=0 01h
BYTE21 SDRAM Module Attributes Neither Buffered nor Registered 00h
BYTE22 SDRAM Device Attributes, General
+/-10% voltage tolerance, Burst
Read Single bit Write, Precharge
All, Auto Precharge, Early RAS
Precharge
0Eh
BYTE23 SDRAM Cycle Time @ /CAS Latency=2 10ns 10ns 12ns A0h A0h C0h
BYTE24Access Time from Clock @ /CAS Latency=26ns 6ns 6ns 60h 60h 60h
BYTE25SDRAM Cycle Time @ /CAS Latency=1- - - 00h 00h 00h
BYTE26Access Time from Clock @ /CAS Latency=1- - - 00h 00h 00h
BYTE27Minimum Row Precharge Time (tRP) 20ns 20ns 20ns 14h 14h 14h
BYTE28Minimum Row Active to Row Active Delay (tRRD) 16ns 20ns 20ns 10h 14h 14h
BYTE29Minimum /RAS to /CAS Delay (tRCD) 20ns 20ns 20ns 14h 14h 14h
BYTE30 Minimum /RAS Pulse width (tRAS) 48ns 50ns 50ns 30h 32h 32h
BYTE31 Module Bank Density 64MB 10h
BYTE32 Command and Address Signal Input Setup Time 2ns 2ns 2ns 20h 20h 20h
BYTE33 Command and Address Signal Input Hold Time 1ns 1ns 1ns 10h 10h 10h
BYTE34 Data Signal Input Setup Time 2ns 2ns 2ns 20h 20h 20h
BYTE35 Data Signal Input Hold Time 1ns 1ns 1ns 10h 10h 10h
BYTE36
–61 Superset Information (may be used in future) -00h
BYTE62 SPD Revision Intel SPD 1.2A 12h 3, 8
BYTE63 Checksum for Bytes 0~62 -DFh 05h 25h
BYTE64 Manufacturer JEDEC ID Code Hynix JEDEC ID ADh
BYTE65
~71 ....Manufacturer JEDEC ID Code Unused FFh
BYTE72 Manufacturing Location
Hynix (Korea Area)
HSA (United States Area)
HSE (Europe Area)
HSJ (Japan Area)
Asia Area
0*h
1*h
2*h
3*h
4*h
9