NUVOTON W90N745CDG

W90N745CDG Allgemeine Beschreibung

General DescriptionThe W90210F Embedded Controller is part of Winbond¢s W90K Embedded processor family. The processor is a high-performance, highly integrated 32-bit processor intended for a wide range of embedded applications, such as set-top box, web browser, X-terminal, and visual/data communication devicesFeaturesMain features of the W90210F• PA-RISC architecture PA-RISC 1.1 third edition instruction set PA-RISC level zero implementation Support PA-RISC Multimedia Extension 1.0 instruction set W90K binary compatible for user software• High-performance implementation Five-stage pipeline Precise, efficient handling of pipeline stalls and exceptions Delayed branch with static branch prediction Forward: not taken Backward: taken One-cycle stall when prediction is wrong HIT under miss Both load and store can be queued when miss Load/store single cycle execution after previous miss• On-chip cache memory Internal I-cache: Direct mapped, 4 KB cache (256 entries, four words/entry) Wrap around fetching when cache miss Cache freeze capability Internal D-cache: 2-way set associative, 2 KB cache (2 ´64 entries, four words/entry) Write-back cache with write buffer Write-through option New line send to CPU before dirty line write back• Enhanced debug capability Debug SFU supports both instruction breakpoints and data breakpoints• High on-chip integration and simple I/O interface 486-like bus interface for CPU core Memory controller to support four banks of DRAM and ROM/FLASH ROM 2-channel 8-bit DMA controller PCI bridge Two Serial ports with FIFO Extended Capabilities Port (ECP) Two 24-bit timer/counters• Power Down mode Provide power down mode for power saving operation

Funktionen

• Main features of the W90210F
• PA-RISC architecture
• PA-RISC 1.1 third edition instruction set
• PA-RISC level zero implementation
• Support PA-RISC Multimedia Extension 1.0 instruction set
• W90K binary compatible for user software
• High-performance implementation
• Five-stage pipeline
• Precise, efficient handling of pipeline stalls and exceptions
• Delayed branch with static branch prediction
• Forward: not taken
• Backward: taken
• One-cycle stall when prediction is wrong
• HIT under miss
• Both load and store can be queued when miss
• Load/store single cycle execution after previous miss
• On-chip cache memory
• Internal I-cache: Direct mapped, 4 KB cache (256 entries, four words/entry)
• Wrap around fetching when cache miss
• Cache freeze capability
• Internal D-cache: 2-way set associative, 2 KB cache (2 ´64 entries, four words/entry)
• Write-back cache with write buffer
• Write-through option
• New line send to CPU before dirty line write back
• Enhanced debug capability
• Debug SFU supports both instruction breakpoints and data breakpoints
• High on-chip integration and simple I/O interface
• 486-like bus interface for CPU core
• Memory controller to support four banks of DRAM and ROM/FLASH ROM
• 2-channel 8-bit DMA controller
• PCI bridge
• Two Serial ports with FIFO
• Extended Capabilities Port (ECP)
• Two 24-bit timer/counters
• Power Down mode
• Provide power down mode for power saving operation

Spezifikationen