SM34020APCM40 SM34020APCM40 |

SM34020APCM40 (NRND) SM34020APCM40



The SM34020APCM40 graphics system processor (GSP) is the second generation of an advanced high-performance CMOS 32-bit microprocessor optimized for graphics display systems. With a built-in instruction cache (I-cache), the ability to simultaneously access memory and registers, and an instruction set designed to expedite raster graphics operations, the SM34020APCM40 provides user-programmable control of the CRT interface, as well as the memory interface [both standard DRAM and multiport video RAM (VRAM)]. The 4-gigabit (512-megabyte) physical address space is addressable on bit boundaries using variable width data fields (1 to 32 bits). Additional graphics addressing modes support 1-, 2-, 4-, 8-, 16-, and 32-bit-wide pixels.


  • Class B High-Reliability Processing
  • 1-µm CMOS Technology
  • Commercial Operating Temperature Range 0°C to 70°C
  • SM34020APCM40 100-ns Instruction Cycle Time
  • Fully Programmable 32-Bit General-Purpose Processor With 512-Megabyte Linear Address Range (Bit Addressable)
  • Second-Generation Graphics System Processor (GSP)
    • Object-Code Compatible With the SM34010
    • Enhanced Instruction Set
    • Optimized Graphics Instructions
    • Coprocessor Interface
  • Pixel Processing, XY Addressing, and Window Checking Built Into the Instruction Set
  • Programmable 1-, 2-, 4-, 8-, 16-, or 32-Bit Pixel Size With 16 Boolean and Six Arithmetic Pixel Processing Options (Raster Ops)
  • 512-Byte LRU On-Chip Instruction Cache (I-Cache)
  • Optimized DRAM/Video RAM (VRAM) Interface
    • Page Mode for Burst-Memory Operations
    • Dynamic Bus Sizing (16-Bit and 32-Bit Transfers)
    • Byte-Oriented CAS Strobes
  • Flexible Host Processor Interface
    • Supports Host Transfers
    • Direct Access to All of the SM34020APCM40 Address Space
    • Implicit Addressing
    • Prefetch for Enhanced Read Access
  • Programmable CRT Control
    • Composite Synchronization Mode
    • Separate Synchronization Mode
    • Synchronization to External Synchronization
  • Direct Support for Special Features of 1M VRAMs
    • Load Write Mask
    • Load Color Mask
    • Block Write
    • Write Using the Write Mask
  • Flexible Multiprocessor Interface
  • 144-Pin PCM Quad Flat Package (QFP)