|Category||DSPs (Digital Signal Processors)|
|Description||Detailedoverview of Features, Specifications, Functional Waveforms,signal Descriptions, Functional Descriptions, Instruction Setsummary And Block Diagram|
|Company||LSI Logic Corporation|
|Datasheet||Download LSI402ZX datasheet
The a 16-bit fixed-point digital signal processor (DSP) based on the LSI Logic ZSP400 DSP core. The LSI402ZX contains an entire DSP system on a single chip, and is designed for applications requiring high throughput and flexibility coupled with a high speed I/O, such as communications infrastructure equipment. The LSI402ZX operates at a clock rate of 200 MHz for a maximum effective throughput of 800 RISC-like MIPS. The LSI402ZX RISC architecture is easy to program and uses a four-way superscalar pipeline with five stages to process to 20 instructions at a time. The processor's execution unit contains two multiply-accumulate units (MACs) and two arithmetic logic units (ALUs). The LSI402ZX also supports single cycle add-compare-select, bit manipulation, and 32-bit arithmetic and logic operations. Figure 1 shows a block diagram of the LSI402ZX.A D Instruction Unit 64 Instruction Cache Pipeline Control Unit Register File
ALU rdA Data Memory wrA 64 32 Data Cache 32 Timer1 Data Unit
MXU = External Memory Interface Unit HPI = Host Processor Interface PIO = Programmable I/O
ICU = Interrupt Control Unit DEU = Device Emulation Unit XBus = External Bus
The LSI402ZX provides 62 Kwords of on-chip instruction zero wait-state RAM and 62 Kwords of on-chip data zero wait-state RAM supported by an eight channel DMA controller, which can transfer instructions and data. For optimum I/O performance and flexibility, the LSI402ZX contains two high speed time-division multiplex (TDM) serial ports, a single 16-bit host interface port, an external memory interface unit, and an eight-pin programmable I/O port. An IEEE 1149.1 JTAG port supports program download and debug. LSI Logic provides a software development kit containing an assembler, linker, GUI debugger, simulator, C compiler, and JTAG-based hardware emulator. The LSI402ZX is fabricated in the LSI Logic G12TM-p technology. The LSI402ZX is powered 1.8 V core and 3.3 V I/O supply, and is packaged a 208-ball mini-BGA package.
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