Altera PowerPlay Early Power Estimator Bedienungsanleitung PDF herunterladen (Seite 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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Altera PowerPlay Early Power Estimator Bedienungsanleitung Seite 39