TI青年教师培训.ppt

Copyright ? 2003 Texas Instruments. All rights reserved. TI青年教师培训 教学内容 C55和C54的比较 C55系统结构 C55流水线 C55存储器映射和片上外设 C55寄存器 C55寻址模式 课时安排 鉴于面向的对象和课程性质的不同，课时设置可考虑下列三种情况： 54学时 研究生学位课（或专业选修课） 36学时 研究生非专业选修课（或本科选修课） 12－20学时 专题系列讲座 课时安排 以54学时为例，总共安排6学时 以36学时为例，总共安排3学时 以12－24学时为例，总共安排1－2学时 TMS320C55X DSP Block Diagram TMS320C55x Key Features More C55x Features User-configurable IDLE Domains Variable length instructions and efficient block repeat operations Dual MAC operations in a single cycle Performs high precision arithmetic and logical operations Shift a 40-bit result up to 31 bits to the left,or 32 bits to the right Performs arithmetic in a simpler ALU of 16 bits. Hold results of computations and reduce the required memory traffic (4 Accumulators) Comparison Between C54x and C55x Performances Features Comparison Between C54x and C55x With the C55x it can be done faster! C54x Architecture C55x Architecture C55x Program and Instruction Units C55x Addressing Unit (AU) C55x Data Computation Unit (DU) C55x Writes (E and F buses) Functional Diagram of C5510 1 of 2 Functional Diagram of C5510 2 of 2 Pipelines of the C55x Pipeline execution breaks an operation into smaller pieces that can be executed independently. The fetch pipeline is done inside the Instruction Buffer Unit and fills IBQ The execute pipeline fetches instructions from IBQ and executes them C55x Fetch Packet Pipeline C55x Execute Pipeline Execute Pipeline Phases 1 of 2 C5510 Unified Memory Map Memory Access 16M bytes of memory are addressable as program space or data space When the CPU uses program space to read program code from memory, it uses 24-bit addresses to reference bytes. When program accesses data space, it uses 23-bit addresses to reference 16-bit words. In both cases, the address buses carry 24-bit values, but during a data-space access, the least significant bit on the address bus is forced to 0. Data Memory I/O Memory I/O space is separate from data/program space and is available only for