
Configuration Space Register Access Timing
Figure 6-37: tl_cfg_ctl Timing
The following figure shows typical traffic on the tl_cfg_ctl bus. The tl_cfg_add index increments on
the rising edge of the pld_clk. The address specifies which Configuration Space register data value is
being driven onto tl_cfg_ctl.
coreclkout_hip
tl_cfg_add[3:0]
tl_cfg_ctl[31:0]
D E F 0 1 2 3
00000084 00000000 28100000 08000000 00000002
Configuration Space Register Access
The tl_cfg_ctl signal is a multiplexed bus that contains the contents of Configuration Space registers as
shown in the figure below. Information stored in the Configuration Space is accessed in round robin
order where tl_cfg_add indicates which register is being accessed. The following table shows the layout
of configuration information that is multiplexed on tl_cfg_ctl.
UG-01145_avst
2015.05.04
Configuration Space Register Access Timing
6-47
Interfaces and Signal Descriptions
Altera Corporation
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