Intel D2500 DF8064101055400 Datenbogen
Produktcode
DF8064101055400
20
Datasheet - Volume 1 of 2
2.2
System Memory Interface
Table 2-7. Memory Channel A
Signal Name
Description
Direction
Type
DDR3_CK[3:0]
DDR3_CK#[3:0]
DDR3_CK#[3:0]
SDRAM and inverted Differential Clock: (3pairs per DIMM)
The differential clock pair is used to latch the command
The differential clock pair is used to latch the command
into DRAM. Each pair corresponds to rank on DRAM side.
O
DDR3
DDR3_CS#[3:0]
Chip Select: (1 per Rank). Used to qualify the command on
the command bus for a particular rank.
O
DDR3
DDR3_CKE[3:0]
Clock Enable: (power management - 1 per Rank)
It is used during DRAM power up/power down and Self
It is used during DRAM power up/power down and Self
refresh.
O
DDR3
DDR3_MA[15:0]
Multiplexed Address. Memory address bus for writing data
to memory and reading data from memory. These signals
follow common clock protocol w.r.t. CK/CK# pairs
O
DDR3
DDR3_BS[2:0]
Bank Select: These signals define which banks are selected
within each SDRAM rank
O
DDR3
DDR3_RAS#
Write Enable Control Signal: Used with SA_WE# and
SA_CAS# (along with, control signal, SA_CS#) to define
the SDRAM Commands.
O
DDR3
DDR3_CAS#
Write Enable Control Signal: Used with SA_WE# and
SA_CAS# (along with control signal, SA_CS#) to define the
SDRAM Commands.
O
DDR3
DDR3_WE#
Write Enable Control Signal: Used with SA_WE# and
SA_CAS# (along with control signal, SA_CS#) to define the
SDRAM Commands.
O
DDR3
DDR3_DQ[63:0]
Data Lines. Write Enable Control Signal: Used with
SA_WE# and SA_CAS# (along with control signal,
SA_CS#) to define the SDRAM Commands.
I/O
DDR3
DDR3_DM[7:0]
Write Enable Control Signal: Used with SA_WE# and
SA_CAS# (along with control signal, SA_CS#) to define the
SDRAM Commands.
O
DDR3
DDR3_DQS[7:0]
DDR3_DQS#[7:0]
DDR3_DQS#[7:0]
Data Strobes: SA_DQS[7:0] and its complement signal
group make up a differential strobe pair. The data is
captured at the crossing point of SA_DQS[8:0] and its
SA_DQS#[8:0] during read and write transactions. For
Read, the Strobe crossover and data are edge aligned,
whereas in the Write command, the strobe crossing is in
the centre of the data window.
I/O
DDR3
DDR3_ODT[3:0]
ODT signal going to DRAM in order to turn ON the DRAM
ODT during Write.
O
DDR3