參數(shù)資料
型號(hào): TMS320LC542-50
元件分類(lèi): 數(shù)字信號(hào)處理
英文描述: Digital Signal Processor
中文描述: 數(shù)字信號(hào)處理器
文件頁(yè)數(shù): 21/111頁(yè)
文件大?。?/td> 1426K
代理商: TMS320LC542-50
TMS320C54x, TMS320LC54x, TMS320VC54x
FIXED-POINT DIGITAL SIGNAL PROCESSORS
SPRS039C – FEBRUARY 1996 – REVISED DECEMBER 1999
21
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
on-chip ROM (continued)
Customers can arrange to have the ROM of the ’54x programmed with contents unique to any particular
application.
on-chip dual-access RAM (DARAM)
The ’541 devices have a 5K-word
×
16-bit on-chip DARAM (5 blocks of 1K-word each).
The ’542 and ’543 devices have a 10K-word
×
16-bit on-chip DARAM (5 blocks of 2K-word each).
The ’545 and ’546 devices have a 6K-word
×
16-bit on-chip DARAM (3 blocks of 2K-word each).
The ’548 and ’549 devices have a 8K-word
×
16-bit on-chip DARAM (4 blocks of 2K-word each).
Each of these RAM blocks can be accessed twice per machine cycle. This memory is intended primarily to store
data values; however, it can be used to store program as well. At reset, the DARAM is mapped into data memory
space. DARAM can be mapped into program/data memory space by setting the OVLY bit in the PMST register.
on-chip single-access RAM (SARAM)
The ’548 and ’549 devices have a 24K word
×
16 bit on-chip SARAM (three blocks of 8K words each).
Each of these SARAM blocks is a single-access memory. This memory is intended primarily to store data values;
however, it can be used to store program as well. At reset, the SARAM is mapped into data memory space
(2000h–7FFFh). SARAM can be mapped into program/data memory space by setting the OVLY bit in the PMST
register.
on-chip memory security
The ’54x devices have a maskable option to protect the contents of on-chip memories. When the related bit is
set, no externally originating instruction can access the on-chip memory spaces.
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