Altera PowerPlay Early Power Estimator - Manual (Page 39)

Column Heading Description
Local Enable %
Enter the average percentage of time that clock enable is high for
destination flipflops.
Local clock enables for flipflops in ALMs are promoted to LAB-wide
signals. When a given flipflop is disabled, the LAB-wide is clock
disabled, cutting clock power and the power for down-stream logic.
This worksheet models only the impact on clock tree power.
Total Power (W) This is the total power dissipation due to clock distribution (in watts).
This value is automatically calculated.
User Comments Enter any comments. This is an optional entry.
For more information about the clock networks of the supported device families, refer to the “Clock
Networks and PLLs” chapter of the respective device handbook.
HSDI Worksheet
The supported device families feature dedicated circuitry that interface with high-speed differential I/O
standards. These are dedicated transmitters and receivers that contain SERDES blocks, respectively. The
HSDI worksheet of the PowerPlay EPE spreadsheet is divided into receiver and transmitter sections.
The power calculated in the HSDI worksheet of the PowerPlay EPE spreadsheet only applies to the
transmitter serializer block or the receiver deserializer block. The transmitter and receiver are
implemented using the ALTLVDS megafunction. The I/O buffer power is calculated in the I/O worksheet
and the PLL power is calculated in the PLL worksheet.
Each row in the HSDI worksheet of the PowerPlay EPE spreadsheet represents a separate receiver or
transmitter domain. Specify the following parameters for transmitter and receiver domains:
• Data rate (in Mbps)
• Number of channels
• Serialization factor in the transmitter domain
• Deserialization factor in the receiver domain
• Toggle percentage
The receiver power is the same whether or not you use the DPA circuitry.
UG-01070
2015.01.20
HSDI Worksheet 3-29
PowerPlay Early Power Estimator Worksheets Altera Corporation
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