Arria GX Architecture
Figure 2–38. Register Chain within a LAB Note (1)
From Previous ALM
Within The LAB
reg_chain_in
To general or
local routing
To general or
local routing
adder0
D
Q
reg0
Combinational
Logic
To general or
local routing
adder1
D
Q
reg1
To general or
local routing
To general or
local routing
To general or
local routing
adder0
D
Q
reg0
Combinational
Logic
To general or
local routing
adder1
D
Q
reg1
To general or
local routing
reg_chain_out
To Next ALM
within the LAB
Note to Figure 2–38:
(1) The combinational or adder logic can be utilized to implement an unrelated, un-registered function.
Altera Corporation
May 2008
2–53
Arria GX Device Handbook, Volume 1