Zilog ZUSBOPTS Manual de usuario descargar pdf (Pagina 117)

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Zilog Developer Studio II – ZNEO™

User Manual

eral page of the Project Settings dialog box (see the Project Settings—General Page

section on page 47).

7. Select at least one of the following checkboxes in the

Flash Options area before eras-

ing or flashing a target:

–

Internal Flash: The internal Flash memory configuration is defined in the Cpu-

FlashDevice.xml

file. The device is the currently selected microcontroller or

microprocessor. When internal Flash is selected, the address range is displayed in

the

Flash Configuration area with an INT extension.

–

External Flash: If you select the External Flash checkbox, select which Flash

devices you want to program. The Flash devices are defined in the

FlashDe-

vice.xml

file.

The device is the current external Flash device’s memory arrangement. When an

external Flash device is selected, the Flash Loader uses the address specified in

the

Flash Base field to begin searching for the selected Flash device. The Flash

Loader reads each page of memory from the

FlashDevice.xml file, checking if

the page is enabled by the chip select register settings. It then queries the actual

address to verify that the correct Flash device is found. If the correct Flash device

is found, the page’s range with an EXT extension and chip select register are dis-

played in the

Flash Configuration area.

The external Flash device options are predefined Flash memory arrangements for spe-

cific Flash devices such as the Micron MT28F008B3. The Flash Loader uses the

external Flash device option arrangements as a guide for erasing and loading the

Intel hexadecimal file in the appropriate blocks of memory.

The Flash Loader is unable to identify, erase or write to a page of Flash that is protected

through hardware. For example, a target might have a write enable jumper to protect the

boot block. In this case, the write enable jumper must be set before flashing the area of

Flash. The Flash Loader displays this page as disabled.

8. To perform a cyclic redundancy check on the entire range of internal Flash memory,

click

CRC. The checksum is displayed in the Status area of the Flash Loader Pro-

cessor

dialog box.

9. In the

Flash Base field, enter where you want the Flash programming to start. The

Flash base defines the start of external Flash.

10. In the

Units drop-down menu, select the number of Flash devices to program. For

example, if you have two devices stacked on top of each other, select

2 in the Units

list box.

11. Select the pages to erase before flashing in the

Flash Configuration area. Pages that

are grayed out are not available.

Note:

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Zilog ZUSBOPTS Manual de usuario Pagina 117

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