The Loongson 1A Processor User Manual provides detailed information on architecture, registers, pin definitions, and configuration of the processor.
This manual describes the Loongson 1A system architecture, including the LS232 CPU core, DDR2 memory controller, PCI, GPU, LCD, SATA, USB, AC97, GMAC, LPC, SPI, UART, I2C, PWM, NAND, CAN, RTC, and power management features. It also contains complete chip pin definitions, startup and clock configuration procedures, and address space allocation for all on‑chip modules.
The document is organized into sections such as Overview, Chip Pin Definition, Startup and Clock Configuration, Address Space Allocation, and detailed chapters for each peripheral. Register tables, address maps, and configuration guidelines are provided for developers and system integrators. This manual is written in Chinese.
| CPU core | LS232 |
|---|---|
| Watchdog enable register address | 0x1fe7_c060 |
The Loongson 1A uses the LS232 processor core.
The Watchdog timer enable register is WDT_EN at address 0x1fe7_c060.