Akura AV26720-HD2 Especificaciones descargar pdf (Pagina 35)

Spectrum Digital, Inc

2-25

The UART can be jumpered via JP11 to generate different interrupt levels. The type of

interrupt is shown in the table below:

2.9 Boot Loading

The EVM320C54xx is equipped with 32K words of flash ROM for parallel boot loading. This

feature does not disallow the ability to boot from the HPI or serial port, but is intended to allow

a convenient method of implementing embedded code on the C54XX evaluation module.

The flash ROM on the evaluation module is mapped in data space and I/O space from

0x8000 to 0xFFFF when the module is reset. If the module is in microcomputer mode

(MP/MC

pin = 0) the boot loader will be executed.

To boot load from flash memory the data must be built in the proper format for the boot loader.

Upon execution of the boot loader in parallel mode the on chip boot loader reads the I/O

space and/or the data space at 0xFFFF to find the boot loader source address. The

appropriate value for the source address boot loading is 0x8000, the flash ROM base

address in data space. Since the flash on the evaluation module is word wide we will use the

16 bit parallel load mode in our example.

After the boot loader extracts the source address from the location specified (0xFFFF). The

boot loader recognition word (0x10AA) must be located at this address (0x8000 in our

example) as shown in table 12.

In our example one section of 0x4000 words will be loaded via the boot loader. Since the part

will be in overlay mode on booting our target program space map will be one shown in figure

2-7 in internal C54XX memory.

Table 14: Onboard UART Interrupt Selection

JP11 Position Interrupt Level

1-2 NMI

2-3 INT1

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 44 45

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Akura AV26720-HD2 Especificaciones Pagina 35