參數資料
型號: TMS320DM648ZUT720
廠商: Texas Instruments, Inc.
英文描述: Digital Media Processor
中文描述: 數字媒體處理器
文件頁數: 96/166頁
文件大小: 1341K
代理商: TMS320DM648ZUT720
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6.10 External Memory Interface A (EMIFA)
6.10.1 EMIFA Device-Specific Information
TMS320DM647/TMS320DM648
Digital Media Processor
SPRS372–MAY 2007
The EMIFA can interface to a variety of external devices or ASICs, including:
Pipelined and flow-through synchronous-burst SRAM (SBSRAM)
ZBT (zero bus turnaround) SRAM and late write SRAM
Synchronous FIFOs
Asynchronous memory, including SRAM, ROM, and Flash
Timing analysis must be done to verify all ac timing requirements are met. TI recommends utilizing I/O
buffer information specification (IBIS) to analyze all ac timing.
To properly use IBIS models to attain accurate timing analysis for a given system, see the
Using IBIS
Models for Timing Analysis Application Report
(literature number
SPRA839
).
To maintain signal integrity, serial termination resistors should be inserted into all EMIFA output signal
lines.
A race condition may exist when certain masters write data to the EMIFA. For example, if master A
passes a software message via a buffer in external memory and does not wait for indication that the write
completes, when master B attempts to read the software message, then the master B read may bypass
the master A write and, thus, master B may read stale data and, therefore, receive an incorrect message.
Some master peripherals (e.g., EDMA3 transfer controllers) will always wait for the write to complete
before signaling an interrupt to the system, thus avoiding this race condition. For masters that do not have
hardware specification of write-read ordering, it may be necessary to specify data ordering via software.
If master A does not wait for indication that a write is complete, it must perform the following workaround:
1. Perform the required write.
2. Perform a dummy write to the EMIFA module ID and revision register.
3. Perform a dummy read to the EMIFA module ID and revision register.
4. Indicate to master B that the data is ready to be read after completion of the read in step 3. The
completion of the read in step 3 ensures that the previous write was done.
96
Peripheral Information and Electrical Specifications
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TMS320DM648ZUT9 功能描述:數字信號處理器和控制器 - DSP, DSC Dig Media Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數: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 安裝風格:SMD/SMT
TMS320DM648ZUTA6 功能描述:數字信號處理器和控制器 - DSP, DSC Digital Media Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數: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 安裝風格:SMD/SMT
TMS320DM648ZUTA8 功能描述:數字信號處理器和控制器 - DSP, DSC Digital Media Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數: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 安裝風格:SMD/SMT
TMS320DM648ZUTD1 功能描述:數字信號處理器和控制器 - DSP, DSC Digital Media Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數: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 安裝風格:SMD/SMT
TMS320DM648ZUTD7 功能描述:數字信號處理器和控制器 - DSP, DSC Digital Media Proc RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數: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 安裝風格:SMD/SMT