Datasheet, Volume 1
93
Electrical Specifications
7.6
Signal Groups
Signals are grouped by buffer type and similar characteristics as listed in
. The
buffer type indicates which signaling technology and specifications apply to the signals.
All the differential signals, and selected DDR3 and Control Sideband signals, have On-
Die Termination (ODT) resistors. There are some signals that do not have ODT and
need to be terminated on the board.
Table 7-3.
Signal Groups
1
(Sheet 1 of 3)
Signal Group
Type
Signals
System Reference Clock
Differential
CMOS Input
BCLK, BCLK#
DPLL_REF_CLK, DPLL_REF_CLK#
DDR3 Reference Clocks
2
Differential
DDR3 Output
SA_CK[1:0], SA_CK#[1:0]
SB_CK[1:0], SB_CK#[1:0]
DDR3 Command Signals
2
Single Ended
DDR3 Output
SA_BS[2:0], SB_BS[2:0]
SA_WE#, SB_WE#
SA_RAS#, SB_RAS#
SA_CAS#, SB_CAS#
SA_MA[15:0], SB_MA[15:0]
DDR3 Control Signals
2
Single Ended
DDR3 Output
SA_CKE[1:0], SB_CKE[1:0]
SA_CS#[1:0], SB_CS#[1:0]
SA_ODT[1:0], SB_ODT[1:0]
SM_DRAMRST#
DDR3 Data Signals
2
Single ended
DDR3 Bi-directional
SA_DQ[63:0], SB_DQ[63:0]
Differential
DDR3 Bi-directional
SA_DQS[7:0], SA_DQS#[7:0]
SB_DQS[7:0], SB_DQS#[7:0]
DDR3 Compensation
Analog
Bi-directional
SM_RCOMP[2:0]
DDR3 Reference
Analog
Input
SM_VREF
TAP (ITP/XDP)
Output
BCLK_ITP, BCLK_ITP#
Single Ended
CMOS Input
TCK, TDI, TMS, TRST#
Single Ended
Open-Drain Output
TDO
Single Ended
Output
DBR#
Single Ended
Asynchronous CMOS
Bi-Directional
BPM#[7:0]
Single Ended
Asynchronous CMOS
Input
PREQ#
Single Ended
Asynchronous CMOS
Output
PRDY#
Control Sideband
Single Ended
CMOS Input
CFG[17:0]