Digital Voice Systems VC-20-ATC-10B Especificaciones descargar pdf (Pagina 42)

FAA20 Embedded NEXCOM Vocoder

Board Manual

This manual has been prepared for the Federal Aviation Administration.

FA100-00107 (March 2004) – Rev 1.0.0 Page 36

6.1.2 Memory Maps

The DSP has three primary address spaces (program memory, data

memory, and IO memory) and four internal memory arrays (DARAM03,

DARAM47, SARAM03, and SARAM47). The DARAM03 array is used in

both the program and data memory spaces. The DARAM47 is presently

unused. The SARAM03 and SARAM47 arrays are used exclusively in the

program memory space.

The flash memory stores the boot application the main application and

configuration parameters. The flash memory is accessed by the DSP in the

data space. The PLD devices support flash memory paging to allow

access to blocks in excess of 32 kbytes.

Memory maps for the three address spaces and the flash device are

provided in Figure 16 through Figure 19.

Figure 16: Program Memory Map

PROGRAM

0x00080

MAIN APP

SARAM0 .. SARAM3

0x2FFFF

0x28000

0x08000

MAIN APP

> 64K x 16

(main app)

0x00600

0x07F80

IRQ VECTORS

MAIN APP

0x3FFFF

0x38000

(Reserved)

SARAM4 .. SARAM7

DARAM0 .. DARAM3

0x1FFFF

0x18000

DARAM4 .. DARAM7

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 108 109

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Digital Voice Systems VC-20-ATC-10B Especificaciones Pagina 42