ARM Cortex-A520

ARM Cortex-A520

General information
Launched	2023
Designed by	ARM Ltd.
Performance
Max. CPU clock rate	1.8 GHz  to 2.27 GHz
Cache
L1 cache	64/128 KiB (32/64 KiB I-cache with parity, 32/64 KiB D-cache) per core
L2 cache	0–512 KiBper complex
L3 cache	256 KiB – 32 MiB(optional)
Architecture and classification
Microarchitecture	ARM Cortex-A520
Instruction set	ARMv9.2-A
Products, models, variants
Product code name	Hayes
History
Predecessor	ARM Cortex-A510

The ARM Cortex-A520 is a "little" CPU core model from Arm ^[1] unveiled in TCS23 (total compute solution) it serves as a successor to the CPU core ARM Cortex-A510 ^[2] . The Cortex-A5xx CPU cores series generally focus on high efficiency, the CPU core can be paired with the other CPU cores in its family like ARM Cortex-A720 or/and Cortex-X4 in a CPU cluster. ^[3]

Improvements

• 8% peak performance improvement over the Cortex-A510 ^[4]
• Support only 64-bit applications
• Up to 512 KiB of private L2 cache (From 256 KiB)
• Add QARMA3 Pointer Authentication (PAC) algorithm support
• Update to ARMv9.2 ^[5]

Architecture comparison

"LITTLE" core

uArch	Cortex-A53	Cortex-A55	Cortex-A510	Cortex-A520
Codename	Apollo	Ananke	Klein	Hayes
Peak clock speed	2.3 GHz	2.1 GHz	2.0 GHz	2.0 GHz
Architecture	ARMv8.0-A	ARMv8.2-A	ARMv9.0-A	ARMv9.2-A
AArch	32-bit and 64-bit			64-bit
Branch predictor history (entries)	3072 [6]	-
Max In-flight	None (In-order)
L0 (Mops entries)	None
L1-I + L1-D	8/64+8/64 KiB	16/64+16/64 KiB	32/64+32/64 KiB
L2	0–256 KiB		0–512 KiB
L3	None	0–4 MiB	0–16 MiB	0–32 MiB
Decode Width	2		3	3 (2 ALU)
Dispatch	8 [7]

See also

• ARM Cortex-X4, related high performance microarchitecture
• ARM Cortex-A720, related efficient sustained performance microarchitecture
• Comparison of ARMv8-A cores, ARMv8 family

References

1. "Arm Launches Next-Gen Efficiency Core; Cortex-A520". WikiChip Fuse. 2023-05-28. Retrieved 2023-09-16.
2. "Arm Cortex-X4, A720, and A520: 2024 smartphone CPUs deep dive". Android Authority. 2023-05-29. Retrieved 2023-06-05.
3. "Cortex-A520". developer.arm.com. Retrieved 2023-09-16.
4. Bonshor, Gavin. "Arm Unveils 2023 Mobile CPU Core Designs: Cortex-X4, A720, and A520 - the ARMv9.2 Family". www.anandtech.com. Retrieved 2023-05-30.
5. Ltd, Arm. "Cortex-A520". Arm | The Architecture for the Digital World. Retrieved 2023-06-05.
6. "ARM's Cortex A53: Tiny But Important". Chips and Cheese. 2023-05-28. Retrieved 2023-06-14.
7. "A closer look at ARM's new Cortex-A75 and Cortex-A55 CPUs". Android Authority. 2017-05-31. Retrieved 2023-06-05.