17–8
Chapter 17: Understanding and Evaluating Power in MAX II Devices
PowerPlay Early Power Estimator Inputs
UFM Section
When the design utilizes the UFM, the PowerPlay Early Power Estimator spreadsheet
considers the time spent during read operations into the power estimation.
shows the UFM section in the PowerPlay Early Power Estimator
spreadsheet.
Figure 17–8.
UFM Section
describes the parameters in the UFM section of the PowerPlay Early Power
Estimator spreadsheet.
Table 17–4.
UFM Section Information
Column Heading
UFM Module
Read %
Description
Enter a name for the UFM module in this column (optional entry).
Enter the percentage of time the UFM spends in Read mode. It takes 16 clock cycles to shift
the serial data out after an internal UFM read so the read operation occurs less than 1/17 (or
about 6%) of the time. The clock in this calculation is the UFM block’s
DRCLK
signal.
Total power dissipation due to reading from the UFM block (mW). Programming and erasing
can only be performed a limited number of times over the life of the device so they do not
contribute to average power.
Enter any comments (optional entry).
Total Power (mW)
User Comments
I/O Section
MAX II devices feature programmable I/O pins that support a wide range of industry
I/O standards for increased design flexibility. The I/O section in the PowerPlay Early
Power Estimator spreadsheet allows you to estimate the I/O pin power consumption
based on the pin’s I/O standards.
The total thermal power is the sum of the thermal power consumed by the device
based on each power rail.
Thermal Power = Thermal P
INT
+ Thermal P
IO
ALTERA [ ALTERA CORPORATION ]
