Aspeed Ast2500 - Datasheet

The ASPEED AST2500 is a 6th-generation Baseboard Management Controller (BMC) featuring an ARM11 CPU, DDR4 support, and integrated PCIe 2D graphics. It acts as a specialized server management processor offering dual Gigabit Ethernet, USB-over-IP, and high-speed DMA capabilities for remote management. For detailed technical specifications, visit Aspeed Tech ASPEED Technology Inc. AST2500 - ASPEED Technology

• Block diagram and functional description — for system capabilities
• Pinout and package drawings — for PCB design
• Electrical characteristics & power sequencing — to ensure reliable boot
• Video/KVM and network sections — to validate remote-management features
• Thermal and mechanical — for enclosure and cooling planning

• PCIe Gen2 x1: Connects the BMC to the host CPU for sideband communication (e.g., shared NIC).
• LPC (Low Pin Count): Standard for legacy Super I/O and TPM communication.
• eSPI (Enhanced Serial Peripheral Interface): A modern replacement for LPC, reducing pin count and improving speed.
• SD/eMMC Controller: Allows the BMC to boot from local Flash storage (up to 2GB eMMC).
• Serial I/O: 4 I2C busses, 2 SPI flash controllers, 16 UARTs (a staggering number for legacy serial console redirection).
• PWM and Tachometer: Up to 16 PWM outputs and 16 fan tachometer inputs – essential for thermal management.

Key Features