ep1agx50d Altera Corporation, ep1agx50d Datasheet - Page 74
ep1agx50d
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ep1agx50d
Description
Arria Gx Device Data Sheet
Manufacturer
Altera Corporation
Datasheet
1.EP1AGX50D.pdf
(296 pages)
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Figure 2–46. M-RAM Block Control Signals
2–66
Arria GX Device Handbook, Volume 1
Dedicated
Row LAB
Clocks
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
6
clock_a
You cannot use an initialization file to initialize the contents of a M-RAM
block. All M-RAM block contents power up to an undefined value. Only
synchronous operation is supported in the M-RAM block, so all inputs
are registered. Output registers can be bypassed.
Similar to all RAM blocks, M-RAM blocks can have different clocks on
their inputs and outputs. Either of the two clocks feeding the block can
clock M-RAM block registers (renwe, address, byte enable, datain,
and output registers). The output register can be bypassed. The six
labclk signals or local interconnect can drive the control signals for the
A and B ports of the M-RAM block. ALMs can also control the clock_a,
clock_b, renwe_a, renwe_b, clr_a, clr_b, clocken_a, and
clocken_b signals, as shown in
The R4, R24, C4, and direct link interconnects from adjacent LABs on
either the right or left side drive the M-RAM block local interconnect. Up
to 16 direct link input connections to the M-RAM block are possible from
the left adjacent LABs and another 16 are possible from the right adjacent
LAB. M-RAM block outputs can also connect to left and right LABs
through direct link interconnect.
for the EP1AGX90 device and the location of the M-RAM interfaces.
Figures 2–48
the logic array.
clocken_a
and
aclr_a
2–49
renwe_a
show the interface between the M-RAM block and
renwe_b
aclr_b
Figure 2–47
Figure
clocken_b
2–46.
shows an example floorplan
clock_b
Altera Corporation
May 2008
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
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