参数资料
型号: TMS320C542PGE-40
厂商: TEXAS INSTRUMENTS INC
元件分类: 数字信号处理
英文描述: 16-BIT, 100 MHz, OTHER DSP, PQFP144
封装: PLASTIC, QFP-144
文件页数: 26/111页
文件大小: 1467K
代理商: TMS320C542PGE-40
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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