Specifications

This processor is based on the second generation DynamIQ CPU, Cortex-A76 and comes with Split-Lock capability which includes Dual Core Lock-Step (DCLS), an advanced feature for increased fault tolerance designs.

The Cortex-A76AE is the first of an all new Arm Cortex-A family of high performance processors for the emerging smart automotive market and it is designed for devices undertaking complex and demanding safety critical tasks.

The Cortex-A76AE is part of the Arm Safety Ready program, a collection of products across the Arm portfolio that have been through various and rigorous levels of functional safety systematic flows and development.

Cotex-A76AE Block Diagram
Architecture Armv8-A (Harvard)  
Extensions
  • Armv8.1 extensions
  • Armv8.2 extensions
  • Cryptography extensions
  • RAS extensions
  • Armv8.3 (LDAPR instructions only)

ISA support
  • A64
  • A32 and T32 (at the EL0 only)
 
Microarchitecture Pipeline Out-of-order
  Superscalar Yes
  Neon / Floating Point Unit Included
  Cryptography Unit Optional
  Max number of CPUs in cluster Four (4)
  Physical Addressing (PA) 40-bit
Memory system and external interfaces L1 I-Cache / D-Cache 64KB
  L2 Cache 128KB to 512KB
  L3 Cache Optional, 512KB to 4MB
  ECC Support Yes
  LPAE Yes
  Bus interfaces AMBA ACE or CHI
  ACP Optional
  Peripheral Port Optional
Functional Safety Dual Core Lock-Step (DCLS) Yes (in safety-mode)
  Memory protection Yes
  Interface protection Yes
  Safety capability
  • Contributes towards up to ASIL D hardware diagnostic metrics.
  • Suitable for up to ASIL D systematic development

Safety package Yes (Extended package)
Other Functional Safety Support Supports ASIL D diagnostics
  Security TrustZone
  Interrupts GIC interface, GICv4
  Generic timer Armv8-A
  PMU PMUv3
  Debug Armv8-A (plus Armv8.2-A extensions)
  CoreSight CoreSightv3
  Embedded Trace Macrocell ETMv4.2 (instruction trace)

Key benefits

  • Split-Lock capability which offers the flexibility to operate in two modes; split mode for performance and lock mode for safety.
  • Fault-tolerant operation in lock mode with DCLS.
  • 4x performance for inference machine learning at the edge.

Key features compared to Cortex-A75

  • 40% better power efficiency per core.
  • 35% improved performance per core. 

Cortex-A comparison table for Armv7-A and Armv8-A

Download the following PDF datasheet to compare the specifications of Cortex-A Armv7-A and Armv8-A processors.

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