DV164101【PDF 14/76 页】KIT DEV PICKIT1 FLASH 8/14PIN

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PICkit ? 1 Flash Starter Kit User’s Guide

2.2.5

Code Protect Device

This function enables the code protection features of the device. To protect the code,

complete the following steps:

1. Import the hex file.

2. Select Tools > Code Protect Device , as shown in Figure 2-7.

3. Click Write Device .

FIGURE 2-7:

CODE PROTECT

Note:

2.2.6

If the device is read after it has been code protected, the Program and

EEDATA Memory windows will display all zeros.

Erase

The Erase function erases code from the device. However, this function is not normally

needed since the Write Device function performs an erase prior to writing code to the

device.

To erase the device using the Erase function, click the Erase button or select

Programmer > Erase from the toolbar menu, as shown in Figure 2-8.

FIGURE 2-8:

DEVICE ERASE

2.2.7

Full Erase

Unlike the Erase function, the Full Erase allows the user to erase not only the device,

but the OSCCAL and bandgap calibration as well. Performing a full erase is not

recommended or needed in the normal course of events. Only use this function if the

OSCCAL or bandgap data has been corrupted.

To perform a full erase, select Programmer > Full Erase (OSCCAL & BG erased) from

the toolbar menu, as shown in Figure 2-8.

Once the full erase is complete, regenerate the OSCCAL and reset the bandgap

calibration value bits.

DS40051D-page 10

Note:

The regenerated OSCCAL function runs a program on the device to

recalculate the oscillator calibration value. See Lesson 7 in

Appendix C. “PIC12F675 Programming Projects” for more details.

? 2004 Microchip Technology Inc.

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