Aspeed | Ast2500 Datasheet New
The ASPEED AST2500 Go to product viewer dialog for this item.
Internal Bus: Utilizes a 128-bit internal DRAM data bus width to ensure high-speed data movement within the controller. aspeed ast2500 datasheet new
Part 6: Where to Find the Official "New" Datasheet?
There are many fake or outdated PDFs on Chinese component sites. To get the official, genuine new AST2500 datasheet: The ASPEED AST2500 Go to product viewer dialog
- Core Processor: ARM926EJ-S CPU running at 800MHz (compared to 400MHz on AST2400). The new datasheet clarifies dynamic voltage scaling to reduce heat under low load.
- Graphics: Integrated 2D graphics controller with hardware cursor. Supports up to 1920x1200 @ 60Hz (DisplayPort) and 1280x1024 (VGA). New note: The latest revision adds timing corrections for 4K H.264 decoding via the dedicated video engine.
- Memory: DDR4 DRAM controller (up to 1GB) or DDR3L (up to 2GB). Critical update in the new datasheet: Supported DDR4 part numbers are strictly limited to x16 organizations; x8 are not supported without a heat sink.
- PCIe: PCIe Gen2 x1 (Root Complex or Endpoint mode). New Errata: Under heavy USB 2.0 traffic, PCIe link retraining may require a specific 10ms delay during system reset.
- I2C Clock Stretching: The AST2500 cannot handle I2C clock stretching from a slow slave beyond 50ms. The new datasheet advises using a level shifter with a built-in timeout (e.g., PCA9306).
- PWM Fan Tachometer Muxing: If you use Fan Tach 5-8, the datasheet now clarifies that you must disable UART4 in the scratch register, or you will get phantom interrupts.
- RTC (Real Time Clock) Drift: A2 silicon has a 5% drift at 55°C. The new datasheet includes a software compensation algorithm (DCR_OFFSET) that must be implemented in the BMC firmware.
The AST2500 is primarily used to implement the Intelligent Platform Management Interface (IPMI). This allows IT professionals to: Core Processor: ARM926EJ-S CPU running at 800MHz (compared
4. Peripheral Connectivity
4.1 Server Management Interfaces
- LPC (Low Pin Count) Bus: Interface to the Host CPU/Southbridge for reading POST codes and legacy I/O.
- eSPI Bus: Enhanced Serial Peripheral Interface (Supports 1, 2, and 4-bit modes). This replaces the LPC bus in newer server architectures, offering higher bandwidth for Host-to-BMC communication.
- PCI-Express (PCIe):
Storage Arrays: Monitoring drive health and thermal status in JBODs or NAS units. Technical Summary Table Specification CPU Core ARM11 @ 800MHz RAM Support DDR3 / DDR4 Video Resolution Interface PCIe 2.0 x1 Networking 2x Gigabit LAN Compliance IPMI 2.0 / Redfish
Memory Support: It supports a wide range of memory interfaces, including DDR3/DDR3L, facilitating flexible system design.