UM0225 datasheet(19/57 Pages) STMICROELECTRONICS

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UM0225

3 Designing with CAPS

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3.1.4

Program device form

Click the Program Device design flow button to program your design into the target device.

Options are also available to calculate the file checksum, generate an SVF or JAM file, and

validate the target device. See Validating and programming the target device for a detailed

description on using this feature.

3.2

Specifying the LVD voltage

Click the LVD Voltage tab to select the LVD threshold voltage.

The STR91x requires separate operating voltage supplies. The CPU and memory operate from

at 1.65 to 2.0 volts on the VDD pins, and the I/O ring operates at 2.7 to 3.6 volts on the VDDQ

pins

Note: 1 Choose 2.4 volts LVD threshold voltage to go with a VDDQ of 2.7 to 3.3 volts.

2 Choose 2.7 volts LVD threshold voltage to go with a VDDQ of 3.0 to 3.6 volts.

3 If you to use USB, VDDQ of 3.3 volts is required to meet USB specifications. Select the 2.7 volt

LVD threshold voltage.

The dialog shown in Figure 11.: LVD Voltage tab, is used to select the desired LVD threshold

voltage.

Configuration

Use this form for additional design settings,

including setting security, selecting the power-up

boot flash, specifying a user code, setting the

internal memory sector protection, specifying OTP

memory programming, and your firmware

placement information.

UM0225 Datasheet(PDF) 19 Page - STMicroelectronics