Altera Stratix V Avalon-ST Instrukcja Użytkownika Strona 108

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Configuration Space Register Access Timing
Figure 5-38: 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.
pld_clk
tl_cfg_add[3:0]
tl_cfg_ctl[31:0]
2 3 4 5 6 7 8 9 A B 8 9 A B C D E
00... 00... 00... 7F...
00000000 00000000
00... 00...
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.
5-56
Configuration Space Register Access Timing
UG-01097_avst
2014.12.15
Altera Corporation
Interfaces and Signal Descriptions
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