TMS320C54x片内有1条程序总线，3条数据总线和4条地址总线。这3条数据总线（CB、DB和EB）将内部各单元连接在一起。其中，CB和DB总线传送从数据存储器读出的操作数，EB总线传送写到存储器中的数据。并行运算就是同时利用D总线和E总线。其中，D总线用来执行加载或算术运算，E总线用来存放先前的结果。

并行指令有并行加载和乘法指令，并行加载和存储指令，并行存储和乘法指令，以及并行存储和加/减法指令4种。所有并行指令都是单字单周期指令。并行运算时存储的是前面的运算结果，存储之后再进行加载或算术运算。这些指令都工作在累加器的高位，且大多数并行运算指令都受ASM（累加器移位方式位）影响。

-TMS320C54x chip has a program bus, three data buses and four address buses. These three data buses (CB, DB and EB) connected to each unit within. Wherein, CB and DB bus transfer from the data memory read operand, EB bus transfer the data written to the memory. Parallel computing is the simultaneous use of D bus and E-bus. Wherein, D bus is used to perform arithmetic operation load or, E bus for storing the previous result. Parallel instruction with parallel load and multiply instructions, parallel load and store instructions, parallel storage and multiply instructions, as well as parallel storage and processing/subtract instruction four kinds. All instructions are single-word parallel single-cycle instructions. Parallel operation is stored when the result of the previous operation, and then be loaded or stored arithmetic. These commands are working in the accumulator high, and most parallel arithmetic instructions are protected by ASM (accumulator shift mode bits) affected.