The ASPEED AST2500 is a 14nm (or 28nm depending on revision) system-on-chip (SoC) designed specifically for server management. It is the successor to the widely deployed AST2400 and is architecturally similar to the AST2510 and AST2520 variants (which focus on industrial automation).
Includes a USB 2.0 virtual hub controller supporting up to 5 devices. aspeed ast2500 datasheet new
| Parameter | Specification (New Revision) | Notes | | :--- | :--- | :--- | | | ARM926EJ-S, 32-bit RISC | 384KB L2 Cache | | Max Frequency | 400 MHz (Standard) / 800 MHz (Overdrive mode) | Overdrive requires enhanced cooling | | Operating Voltage | 3.3V I/O, 0.9V Core, 1.8V DDR4 | New: Absolute max input on ADC: 1.8V | | Integrated Video | 2D Graphics Engine, 1920x1200@60Hz | 256MB DDR4 frame buffer | | Host Interfaces | PCIe Gen2 (x1, dual root), eSPI, LPC 1.0 | New: eSPI is preferred for Z690/C621 chipsets | | Peripheral IF | 2x GbE MAC, 6x UART, 2x SPI, 1x SD/SDIO, 8x PWM | New: SPI clock speed maxed at 100MHz | | Temperature Range | 0°C to 70°C (Commercial) or -40°C to 105°C (Industrial) | Check suffix: -IR for industrial | | Package | 484-pin LFBGA, 19x19mm | 0.8mm pitch | The ASPEED AST2500 is a 14nm (or 28nm
The JTAG port (Section 12) remains active even when the ARM core is halted . You can debug a crashed BMC without power-cycling—invaluable for firmware developers. | Parameter | Specification (New Revision) | Notes
: Supports DDR3/DDR4 SDRAM (up to 1600Mbps), providing the necessary bandwidth for complex management firmware like OpenBMC or AMI MegaRAC.
"The BMC boots fine, but I lose network connectivity after 48 hours." Solution (New Sheet): On page 342 (RMII/RGMII Interface), the new datasheet adds a footnote: "MAC1 auto-negotiation should be disabled if PHY clock drift exceeds 50ppm." The old sheet omitted this.