Datasheet > AN6092

AN6092

更新时间： 2023-12-20 18:45:52

品牌	Logo	应用领域
莱迪思 - LATTICE		/
页数	文件大小	规格书
17页	2930K
描述
Implementing VID Function with Platform Manager 2

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AN6092 数据手册

Implementing VID Function with Platform Manager 2

Figure 7. Settings for Configuring TrimCell

As highlighted in Figure 7 the Trim/Margin Tab provides the following features:

• Trim Configuration Mode – Provides the following two options for configuring the TrimCell operation:

- Manual – Configures TrimCell for open loop operation. You are required to enter the DAC codes.

- Trim Calculator – Configures TrimCell for closed loop trim. You are required to enter the Target Volt-

ages. The DAC codes are calculated automatically by the software. For VID operation, this option

should be selected.

• DC-DC Converter – This drop-down box provides a list of previously built DC-DC converter models. From the

list, you can select the model used in VID implementation.

• Voltage Profile0 – The Trim/Margin tab displays the VID Setpoint value (entered in Step 1) as the Target Voltage

(V) for the Voltage Profile0 (Nominal Voltage). The corresponding DAC Code and DAC Current values are also

shown.

• Voltage Profile1, 2 – Enter the minimum and maximum values for Voltage Profile 1 and 2 to cover the expected

range of VID operation. The software tool issues a warning message if the Voltage Profile 1 or 2 values exceed

the DAC range. For the purposes of calculating the resistor interface, it does not matter which Voltage Profile

contains the minimum or maximum value.

• DAC Output Range (BPZ Voltage) – This displays the Bi - Polar Zero (BPZ) Voltage which can be manually

selected in the Options window or automatically from the Calculate button. Four values are supported, they are

0.6 V, 0.8 V, 1.0 V, and 1.25 V.

• Calculate – When you click the Calculate button, the Trim Resistor values are calculated and the interconnec-

tion of ASC with the DC-DC converter is displayed at the bottom of the Trim/Margin tab. Often the Trim Resistor

Network can be simplified by specifying the BPZ Voltage that matches the DC-DC reference Voltage in the

Options window.

• Options – Using the Options button, the Max Supply Adjustment Range can be expanded. The trim DAC has

bounded range from -128 to +127 codes. By default, the Trim Calculator restricts the voltage setting ranges to +/-

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