嵌入式系统原理与设计 教学课件 作者 蒋建春 主编 um_s3c44box.pdfVIP

S3C44B0X RISC MICROPROCESSOR PRODUCT OVERV IEW 1 PRODUCT OVERVIEW INTRODUCTION SAMSUNGs S3C44B0X 16/32-bit RISC microprocessor is designed to provide a cost-effective and high performance micro-controller solution for hand-held devices and general applications. To reduce total system cost, S3C44B0X also provides the following: 8KB cache, optional internal SRAM, LCD controller, 2-channel UART with handshake, 4- channel DMA, System manager (chip select logic, FP/ EDO/SDRAM controller), 5-channel timers with PWM, I/O ports, RTC, 8-channel 10-bit ADC, IIC-BUS interface, IIS-BUS interface, Sync. SIO interface and PLL for clock. The S3C44B0X was developed using a ARM7TDMI core, 0.25 um CMOS standard cells, and a memory compiler. Its low-power, simple, elegant and fully static design is particularly suitable for cost-sensitive and power sensitive applications. Also S3C44B0X adopts a new bus architecture, SAMBA II (SAMSUNG ARM CPU embedded Microcontroller Bus Architecture). An outstanding feature of the S3C44B0X is its CPU core, a 16/32-bit ARM7TDMI RISC processor (66MHz) designed by Advanced RISC Machines, Ltd. The architectural enhancements of ARM7TDMI include the Thumb de- compressor, an on-chip ICE breaker debug support, and a 32-bit hardware multiplier. By providing a complete set of common system peripherals, the S3C44B0X minimizes overall system costs and eliminates the need to configure additional components. The integrated on-chip functions that are described in this document are as follows: 2.5V Static ARM7TDMI CPU core with 8KB cache . (SAMBA II bus architecture up to 66MHz) External memory controller. (FP/EDO/SDRAM Control, Chip Select logic) LCD controller (up to 256 color DSTN) with 1-ch LCD-dedicated DMA. 2-ch general DMAs / 2-ch peripheral DMAs with external request pins 2-ch UART with handshake(IrDA1.0, 16-byte FIFO) / 1-ch SIO 1-ch mult