User Manual

22 UG027, May 21, 2014
 Global Clock Mux (GCM)
 Quadrant Clock Mux (QCM)
 Region Clock Mux (RCM)
 Byte-Lane Clock Mux (BCM)
The global boundary clock network traverses through each of these mux stages, whereas the
local boundary clock uses a shortened path that ties the output of the GCM directly into the
BCM. The full boundary clock network architecture is shown in detail in Figure 13 below,
with red paths highlighting the GCM to QCM connectivity, the blue paths highlighting the
QCM to RCM connectivity and the dark yellow paths highlighting the RCM to BCM paths.
The local boundary clock network is shown in green.
GCMSW
Fabric Core
GCMNW
GCMNE
16 clock networks
RCMWS
RCMWN
BCMWS BCMWN
16 clock networks
GCMSE
QCMWS
QCMSW
ZGMSW_IQ_CLK[15:0]
ZGMSW_IQ_CLK[15:0]
ZGMSE_IQ_CLK[15:0]
ZGMNW_IQ_CLK[15:0]
ZGMSE_IQ_CLK[15:0]
ZGMNE_IQ_CLK[15:0]
ZQMWS_IR_CLK[15:0]
ZQMSW_IR_CLK[15:0]
QCMWN
QCMNW
ZQMWN_IR_CLK[15:0]
ZQMNW_IR_CLK[15:0]
ZGMSW_IB_CLK[15:0]
ZGMNW_IB_CLK[15:0]
ZRMWN_IB_CLK[15:0]ZRMWS_IB_CLK[15:0]
ZGMNW_IQ_CLK[15:0]
ZGMNE_IQ_CLK[15:0]
QCMES
QCMSE
ZQMES_IR_CLK[15:0]
ZQMSE_IR_CLK[15:0]
QCMEN
QCMNE
ZQMNE_IR_CLK[15:0]
RCMES
RCMEN
ZQMEN_IR_CLK[15:0]
BCMEN
ZGMNE_IB_CLK[15:0]
ZRMEN_IB_CLK[15:0]
BCMES
ZRMES_IB_CLK[15:0]
ZGMSE_IB_CLK[15:0]
RCMNW
BCMNW
ZRMNW_IB_CLK[15:0]
RCMSW
BCMSW
ZRMSW_IB_CLK[15:0]
16 clock networks16 clock networks
BCMSE
RCMSE
ZRMSE_IB_CLK[15:0]
RCMNE
BCMNE
ZRMNE_IB_CLK[15:0]
RCMWC
16 clock networks
ZRMWC_IB_CLK[15:0]
16 clock networks
RCMEC
BCMEC
ZRMEC_IB_CLK[15:0]
BCMWC
Clock Mux
Clock Mux
Figure 13: Full Boundary Clock Network Architecture
Note that usage of the local boundary clock is more restrictive in that the South BCMs can
only be fed by the South GCMs/CGs. The North and Center BCMs can only be fed by the
North GCMs/CGs. The output of the BCMs can additionally be used to enter the core clock
network, though this is generally not recommended.