Nexus 21 1066MT/s Interposer, DDR3 800, NEX DDR3INTR THIN Symbol, Definition, 7.0HINTS & TIPS, 7.1Symbolic Triggering on a Command using B_DDR3D_XX Supports

7.0HINTS & TIPS7.1Symbolic Triggering on a Command using B_DDR3D_XX Supports

A Symbol Table has been included for the Control data groups defined in each of the support packages. The Symbol Table for the B_DDR3D_2D / 3A supports is shown in Table 8; the Symbol Table for the B_DDR3D_2G support is shown in Table 9. The use of Symbol Tables when triggering makes it easier for the user to define a given cycle to be triggered on. Rather than trying to remember what signals make up the Control group, the Symbol Table has the appropriate bits already set for the given cycle.

It is important to note that changing the channel definition of the Control group can result in incorrect symbol information being displayed.

Symbol Definition

cc ssss = x1 1110 for S0# cc ssss = 1x 1101 for S1# cc ssss = x1 1011 for S2# cc ssss = 1x 0111 for S3#

x in Definition = Don’t Care

MRS – Sx# MODE REGISTER SET	cc ssss xxx xxx xx000
REF – Sx# REFRESH	cc ssss xxx xxx xx001
PRE – Sx# SINGLE BANK PRECHARGE	cc ssss xxx xxx x0010
PREA – Sx# PRECHARGE ALL BANKS	cc ssss xxx xxx x1010
ACT – Sx# ACTIVATE BANK	cc ssss xxx xxx xx011
WR – Sx# WRITE	cc ssss xxx xxx x0100
WRA – Sx# WRITE WITH AUTO	cc ssss xxx xxx x1100
PRECHARGE
RD – Sx# READ	cc ssss xxx xxx x0101
RDA – Sx# READ WITH AUTO	cc ssss xxx xxx x1101
PRECHARGE
NOP –Sx# NO OPERATION	cc ssss xxx xxx xx111
DES - DEVICE DESELECT	cc ssss xxx xxx xxxxx
ZQCL – Sx# ZQ CALIBRATION LONG	cc ssss xxx xxx x1110
ZQCS – Sx# ZQ CALIBRATION SHORT	cc ssss xxx xxx x0110

Table 8 - B_DDR3D_2D / 3A Control Symbol Table

Signals, left-to-right: CKE1, CKE0, S3#, S2#, S1#, S0#, BA2, BA1, BA0, A15, A14, A13,

A12/BC#, A10/AP, RAS#, CAS#, WE#

DDR3THIN-MN-XXX 69 Doc. Rev. 1.11