Datasheet

SAM9261 [DATASHEET]
Atmel-6062O-ATARM-SAM9261-Datasheet_21-Jun-16
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6. Processor and Architecture
6.1 ARM926EJ-S Processor
 RISC Processor Based on ARM v5TEJ Architecture with Jazelle technology for Java acceleration
 Two Instruction Sets
 ARM High-performance 32-bit Instruction Set
 Thumb High Code Density 16-bit Instruction Set
 DSP Instruction Extensions
 5-Stage Pipeline Architecture:
 Instruction Fetch (F)
 Instruction
Decode (D)
 Execute (E)
 Data Memory (M)
 Register Write (W)
 16 Kbyte Data Cache, 16 Kbyte Instruction Cache
 Virtually-addressed 4-way Associative Cache
 Eight words per line
 Write-through and Write-back Operation
 Pseudo-random or Round-robin Replacement
 Write Buffer
 Main Write Buffer with 16-word Data Buffer and 4-address Buffer
 DCache Write-back Buffer with 8-word Entries and a Single Address Entry
 Software Control Drain
 Standard ARM v4 and v5 Memory Management Unit (MMU)
 Access Permission for Sections
 Access Permission for large pages and small pages can be specified separately for each quarter of
the page
 16 embedded domains
 Bus Interface Unit (BIU)
 Arbitrates and Schedules AHB Requests
 Separate Masters for both instruction and data access providing complete AHB system flexibility
 Separate Address and Data Buses for both the 32-bit instruction interface and the 32-bit data interface
 On Address and Data Buses, data can be 8-bit (Bytes), 16-bit (Half-words) or 32-bit (Words)