參數(shù)資料
型號(hào)： TMS320VC5409GGU-80
廠商： Texas Instruments
文件頁數(shù)： 36/93頁
文件大?。?/td> 0K
描述： IC FIXED POINT DSP 144-BGA
標(biāo)準(zhǔn)包裝： 160
系列： TMS320C54x
類型： 定點(diǎn)
接口： 主機(jī)接口，McBSP
時(shí)鐘速率： 80MHz
非易失內(nèi)存： ROM（32 kB）
芯片上RAM： 64kB
電壓 - 輸入/輸出： 3.30V
電壓 - 核心： 1.80V
工作溫度： -40°C ~ 100°C
安裝類型： 表面貼裝
封裝/外殼： 144-LFBGA
供應(yīng)商設(shè)備封裝： 144-BGA MICROSTAR（12x12）
包裝： 托盤
配用： 296-15829-ND - DSP STARTER KIT FOR TMS320C5416
Functional Overview
41
April 1999 Revised October 2008
SPRS082F
3.3.5.6
DMA in Autoinitialization Mode
The DMA can automatically reinitialize itself after completion of a block transfer. Some of the DMA registers
can be preloaded for the next block transfer through the DMA global reload registers (DMGSA, DMGDA, and
DMGCR). Autoinitialization allows:
Continuous operation: Normally, the CPU would have to reinitialize the DMA immediately after the
completion of the current block transfer; but with the global reload registers, it can reinitialize these values
for the next block transfer any time after the current block transfer begins.
Repetitive operation: The CPU does not preload the global reload register with new values for each block
transfer but only loads them on the first block transfer.
3.3.5.7
DMA Transfer Counting
The DMA channel element count register (DMCTRx) and the frame count register (DMFRCx) contain bit fields
that represent the number of frames and the number of elements per frame to be transferred.
Frame count. This 8-bit value defines the total number of frames in the block transfer. The maximum
number of frames per block transfer is 128 (FRAME COUNT= 0ffh). The counter is decremented upon
the last read transfer in a frame transfer. Once the last frame is transferred, the selected 8-bit counter is
reloaded with the DMA global frame reload register (DMGFR) if the AUTOINIT bit is set to 1. A frame count
of 0 (default value) means the block transfer contains a single frame.
Element count. This 16-bit value defines the number of elements per frame. This counter is decremented
after the read transfer of each element. The maximum number of elements per frame is 65536
(DMCTRn = 0FFFFh). In autoinitialization mode, once the last frame is transferred, the counter is
reloaded with the DMA global count reload register (DMGCR).
3.3.5.8
DMA Transfers in Double-word Mode (Internal Only)
Double-word mode allows the DMA to transfer 32-bit words in any index mode. In double-word mode, two
consecutive 16-bit transfers are initiated and the source and destination addresses are automatically updated
following each transfer. In this mode, each 32-bit word is considered to be one element.
3.3.5.9
DMA Channel Index Registers
The particular DMA channel index register is selected by way of the SIND and DIND field in the DMA mode
control register (DMMCRx). Unlike basic address adjustment, in conjunction with the frame index DMFRI0 and
DMFRI1, the DMA allows different adjustment amounts depending on whether or not the element transfer is
the last in the current frame. The normal adjustment value (element index) is contained in the element index
registers DMIDX0 and DMIDX1. The adjustment value (frame index) for the end of the frame is determined
by the selected DMA frame index register (either DMFRI0 or DMFRI1).
The element index and the frame index affect address adjustment as follows:
Element index: For all except the last transfer in the frame, the element index determines the amount to
be added to the DMA channel for the source/destination address register (DMSRCx/DMDSTx) as
selected by the SIND/DIND bits.
Frame index: If the transfer is the last in a frame, the frame index is used for address adjustment as
selected by the SIND/DIND bits. This occurs in both single-frame and multi-frame transfer.
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TMS320VC5409PGE100 制造商:Texas Instruments 功能描述:Digital Signal Processor IC
TMS320VC5409PGE-80 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC Fixed-Pt Dig Signal Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
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