ep2s130 Altera Corporation, ep2s130 Datasheet - Page 43

• Manufacturer Part Number: ep2s130
• Description: Stratix Ii Device Family Data Sheet
• Manufacturer: Altera Corporation

Figure 2–23. M-RAM Block Control Signals
Altera Corporation
May 2007
Dedicated
Row LAB
Clocks
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
6
clock_a
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 possible from the right adjacent
LAB. M-RAM block outputs can also connect to left and right LABs
through direct link interconnect.
for the EP2S130 device and the location of the M-RAM interfaces.
Figures 2–25
the logic array.
clocken_a
aclr_a
and
renwe_a
2–26
show the interface between the M-RAM block and
renwe_b
aclr_b
Figure 2–24
Figure
clocken_b
Stratix II Device Handbook, Volume 1
2–23.
clock_b
shows an example floorplan
Stratix II Architecture
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
2–35