ꢀ
ꢁꢂ
ꢃ
ꢄ
ꢅ
ꢆ
ꢇ
ꢄ
ꢈ
ꢉ
ꢀ
ꢁꢂ
ꢃ
ꢄ
ꢅ
ꢆ
ꢇ
ꢊ
ꢈ
ꢉ
ꢀ
ꢁꢆ
ꢃ
ꢄ
ꢅ
ꢆ
ꢇ
ꢄ
ꢈ
ꢉ
ꢀ
ꢁꢆ
ꢃ
ꢄꢅ
ꢆ
ꢇ
ꢊ
ꢈ
ꢀ
ꢁ
ꢂ
ꢃ
ꢄ
ꢋ
ꢂ
ꢇ
ꢄ
ꢈ
ꢉ
ꢀ
ꢁ
ꢂ
ꢃ
ꢄ
ꢋ
ꢂ
ꢇ
ꢊ
ꢈ
ꢉ
ꢀ
ꢁ
ꢆ
ꢃ
ꢄ
ꢋ
ꢂ
ꢇ
ꢄ
ꢈ
ꢉ
ꢀ
ꢁ
ꢆ
ꢃ
ꢄ
ꢋ
ꢂ
ꢇ
ꢊ
ꢈ
ꢃ
ꢌ
ꢀꢃ
ꢈ
ꢇ
ꢃ
ꢇ
ꢍ
ꢇ
ꢎ
ꢀ
ꢎ
ꢍ
ꢏ
ꢐ
ꢀ
ꢇ
ꢑ
ꢈ
ꢎ
ꢁ
ꢒ
ꢓ
ꢔ
ꢎ
ꢁ
ꢁ
ꢏ
ꢇ
ꢐ
ꢕ
ꢃꢖ
SMMS684A − AUGUST 1997 − REVISED FEBRUARY 1998
serial presence detect (continued)
Table 3. Serial Presence Detect Data for the TM2EP72DxN
’2EP72DxN-50
’2EP72DxN-60
’2EP72DxN-70
BYTE
NO.
FUNCTION DESCRIBED
ITEM
DATA
ITEM
DATA
ITEM
DATA
Defines number of bytes written
into serial memory during module
manufacturing
0
128 bytes
80h
128 bytes
80h
128 bytes
80h
Total number of bytes of SPD
memory device
1
2
3
4
5
256 bytes
EDO
11
08h
02h
0Bh
0Ah
01h
256 bytes
EDO
11
08h
02h
0Bh
0Ah
01h
256 bytes
EDO
11
08h
02h
0Bh
0Ah
01h
Fundamental memory type (FPM,
EDO, SDRAM)
Number of row addresses on this
assembly
Number of column addresses on
this assembly
10
10
10
Number of module banks on this
assembly
1 bank
72 bits
1 bank
72 bits
1 bank
72 bits
6
7
Data width of this assembly
Data width continuation
48h
00h
48h
00h
48h
00h
Voltage interface standard of this
assembly
8
LVTTL
01h
LVTTL
01h
LVTTL
01h
9
RASx access time of module
CASx access time of module
t
t
= 50 ns
= 13 ns
32h
0Dh
t
t
= 60 ns
= 15 ns
3Ch
0Fh
t
t
= 70 ns
= 18 ns
46h
12h
RAC
RAC
RAC
10
CAC
CAC
CAC
DIMM configuration type
(non-parity, parity, ECC)
11
ECC
02h
ECC
02h
ECC
02h
12
13
14
62
63
Refresh rate/type
15.6 µs
x8
00h
08h
08h
01h
3Bh
15.6 µs
x8
00h
08h
08h
01h
47h
15.6 µs
x8
00h
08h
08h
01h
54h
DRAM width, primary DRAM
Error-checking SDRAM data width
SPD revision
x8
x8
x8
Rev. 1
59
Rev. 1
71
Rev. 1
84
Checksum for bytes 0−62
Manufacturer’s JEDEC ID code per
JEP-106E
64−71
97h
9700...00h
97h
9700...00h
97h
9700...00h
†
72
73−90
91
Manufacturing location
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
†
Manufacturer’s part number
†
Die revision code
†
PCB revision code
92
†
93−94
95−98
Manufacturing date
†
Assembly serial number
†
99−125 Manufacturer specific data
†
126−127 Vendor specific data
‡
128−166 System integrator’s specific data
167−255 Open
†
‡
TBD indicates values are determined at manufacturing time and are module dependent.
These TBD values are determined and programmed by the customer (optional).
39
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