Altera PowerPlay Early Power Estimator - Manual (Page 29)

Altera Corporation 3–11
January 2007 PowerPlay Early Power Estimator For Stratix II, Stratix II GX & HardCopy II
Using the PowerPlay Early Power Estimator
1
When selecting the RAM block mode, you must know how your
RAM is implemented by the Quartus II Compiler. For example,
if a ROM is implemented with two ports, it is considered a true
dual-port memory and not a ROM. Single-port and ROM
implementations only use port A. Simple dual-port and true
dual-port implementations use port A and port B.
Table 3–3 describes the parameters in the RAM section of the PowerPlay
Early Power Estimator.
Table 3–3. RAM Section Information (Part 1 of 3)
Column Heading Description
Module Enter a name for the RAM module in this column. This is an optional value.
RAM Type Select whether the RAM is implemented as an M512, M4K or M-RAM block.
The RAM type can be found in the Type column of the Quartus II Compilation
Report. In the Compilation Report, select Fitter, and click Resource Section.
Click RAM Summary.
# RAM Blocks Enter the number of RAM blocks in the module that use the same type and mode
and have the same parameters for each port. The parameters for each port are:
clock frequency in MHz, the percentage of time the RAM is enabled, and the
percentage of time the port is writing as opposed to reading. The number of RAM
blocks reported can be found in the M512s, M4Ks and M-RAMs rows of the
Quartus II Compilation Report Resource Usage Summary.
Data Width Enter the width of the data for the RAM block. This value is limited based on the
RAM type. The width of the RAM block can be found in the Port A Width or the Port
B Width column of the Quartus II Compilation Report. In the Compilation Report,
select Fitter, and click Resource Section. Click RAM Summary.
For RAM blocks that have different widths for port A and port B, use the larger of
the two widths.
This number must be an integer. The valid range for each RAM type is:
● 1-18 for M512
● 1-36 (1-18 for True Dual-Port) for M4K
● 1-144 (1-72 for True Dual-Port) for MRAM