Specifications
The Arm Cortex-A78 CPU delivers premium performance with the industry-leading power efficiency for multiple form factors.
The fourth-generation premium core built on DynamIQ technology. Paired with Cortex-A55 CPUs in a scalable DynamIQ big.LITTLE configuration, Cortex-A78 extends the performance and efficiency of premium smartphones to multiple form factors. Consumers demand premium level performance from devices, Cortex-A78 provides up to a 20% sustained performance increase, along with 50% energy savings when compared to earlier generation devices. Together with a solution-focused approach to chip design, including the GPU and NPU, Cortex-A78 provides greater efficiency for multi-day battery life across mobile, laptop, and foldable devices.
Arm Cortex-A78 CPU based on DynamIQ technology
Architecture | Armv8-A (Harvard) | |
Extensions |
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ISA support |
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Microarchitecture |
Pipeline | Out of order |
Superscalar |
Yes | |
Neon / Floating Point Unit | Included | |
Cryptography Unit |
Optional |
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Max number of CPUs in cluster |
4 |
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Physical Addressing (PA) | 40-bit |
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Memory system and external interfaces |
L1 I-Cache / D-Cache | 32KB to 64KB |
L2 Cache | 256KB to 512KB | |
L3 Cache | Optional, 512KB to 4MB Up to 8MB (with Cortex-X1) |
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ECC Support | Yes | |
LPAE | Yes | |
Bus interfaces | AMBA ACE or CHI | |
ACP | Optional | |
Peripheral Port | Optional | |
Functional Safety Support | ASIL D systematic | |
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) |
Compare the specifications of Cortex-A Armv7-A and Armv8-A processors:
Arm Security Algorithm Accelerators
Download the hardware block:
Cortex-A78_Security_Algorithm_Accelerator.tar.gz | 588 KB |
Key features compared to Cortex-A77
Some of the key areas where Cortex-A78 improves on performance and energy efficiency of Cortex-A77.
- Twenty percent sustained performance improvements (assuming a 1W power budget)
- Fifty percent energy savings at same performance, enabling multi-day battery life using latest process nodes
- Extended scalability with extra support from the DynamIQ Shared Unit for big.LITTLE