Datasheet
73
Signal Description
6.2
Memory Reference and Compensation
SB_MA[15:0]
Memory Address:
These signals are used to
provide the multiplexed row and column
address to the SDRAM.
O
DDR3
SB_CK[1:0]
SDRAM Differential Clock:
Channel B
SDRAM Differential clock signal pair. The
crossing of the positive edge of SB_CK and
the negative edge of its complement
SB_CK# are used to sample the command
and control signals on the SDRAM.
O
DDR3
SB_CK#[1:0]
SDRAM Inverted Differential Clock:
Channel B SDRAM Differential clock signal-
pair complement.
O
DDR3
SB_CKE[1:0]
Clock Enable:
(1 per rank) Used to:
- Initialize the SDRAMs during power-up.
- Power-down SDRAM ranks.
- Place all SDRAM ranks into and out of self-
refresh during STR.
O
DDR3
SB_CS#[1:0]
Chip Select:
(1 per rank) Used to select
particular SDRAM components during the
active state. There is one Chip Select for
each SDRAM rank.
O
DDR3
SB_ODT[1:0]
On Die Termination:
Active Termination
Control.
O
DDR3
Table 6-23.Memory Reference and Compensation
Signal Name
Description
Direction/Buffer
Type
SM_RCOMP[2:0]
System Memory Impedance
Compensation:
.
I
A
SA_DIMM_VREFDQ
SB_DIMM_VREFDQ
Memory Channel A/B DIMM Voltage
.
O
A
Table 6-22.Memory Channel B (Sheet 2 of 2)
Signal Name
Description
Direction/
Buffer Type
