DSM2180F3 datasheet(15/63 Pages) STMICROELECTRONICS

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DSM2180F3

SPECIFYING MEM MAP WITH PSDSOFT EXPRESSTM

The memory map shown in Figure 7 can be easily

specified with PSDsoft ExpressTM in a point-and-

click environment. PSDsoft ExpressTM will gener-

ate Hardware Definition Language (HDL) state-

ments of the ABEL language. Figure 8 shows the

resulting equations generated by PSDsoft Ex-

pressTM.

Figure 8. HDL Statements Generated from PSDsoft Express to Implement Memory Map

Specifying these equations using PSDsoft Ex-

pressTM is very simple. Figure 9 shows how to

specify the equation for the 16K Byte Flash mem-

ory segment,

fs2. Notice how fs2 can reside in two

different address spaces depending on the state of

the control signals from the DSP (IOMS, DMS, or

BMS

) and the memory page number coming from

the DSM Page Register outputs. This specification

process is repeated for all other Flash memory

segments, the

csiop register block, and any exter-

nal chip select signals (UART, etc.).

csiop = ((address >= ^h0000) & (address <= ^h00FF) & (!_ioms & _dms & _bms));

fs0 = ((address >= ^h0000) & (address <= ^h3FFF) & (_ioms & _dms & !_bms))

# ((page == 0) & (address >= ^h0000) & (address <= ^h3FFF) & (_ioms & !_dms &

_bms));

fs1 = ((address >= ^h4000) & (address <= ^h7FFF) & (_ioms & _dms & !_bms))

# ((page == 1) & (address >= ^h0000) & (address <= ^h3FFF) & (_ioms & !_dms &

_bms));

fs2 = ((address >= ^h8000) & (address <= ^hBFFF) & (_ioms & _dms & !_bms))

# ((page == 2) & (address >= ^h0000) & (address <= ^h3FFF) & (_ioms & !_dms &

_bms));

fs3 = ((address >= ^hC000) & (address <= ^hFFFF) & (_ioms & _dms & !_bms))

# ((page == 3) & (address >= ^h0000) & (address <= ^h3FFF) & (_ioms & !_dms &

_bms));

fs4 = ((address >= ^h10000) & (address <= ^h13FFF) & (_ioms & _dms & !_bms))

# ((page == 4) & (address >= ^h0000) & (address <= ^h3FFF) & (_ioms & !_dms &

_bms));

fs5 = ((address >= ^h14000) & (address <= ^h17FFF) & (_ioms & _dms & !_bms))

# ((page == 5) & (address >= ^h0000) & (address <= ^h3FFF) & (_ioms & !_dms &

_bms));

fs6 = ((address >= ^h18000) & (address <= ^h1BFFF) & (_ioms & _dms & !_bms))

# ((page == 6) & (address >= ^h0000) & (address <= ^h3FFF) & (_ioms & !_dms &

_bms));

fs7 = ((address >= ^h1C000) & (address <= ^h1FFFF) & (_ioms & _dms & !_bms))

# ((page == 7) & (address >= ^h0000) & (address <= ^h3FFF) & (_ioms & !_dms &

_bms));

! _cs_uart = ((address >= ^h0200) & (address <= ^h0207) & (!_ioms & _dms & _bms));

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