是ADI公司的ADuC7020芯片的IO核心板！蛮不错的！实际效果图：MCU: ADuC7020 - ARM7TDMI Core, 16/32-bit RISC architecture, 5 Channels 12-bit, 1MSPS ADC, Differential and single-ended modes, 0 to Vref Analog Input Range, 4 Outputs 12-bit Voltage Output DACs, On-Chip 20ppm/°C Voltage Reference, On-Chip Temperature Sensor (±3°C), Uncommitted Voltage Comparator, JTAG Port, Clocking options: Trimmed On-Chip Oscillator (± 2%), External Watch crystal, External clock source45MHz PLL with Programmable Divider, 62k Bytes Flash/EE Memory, 8k Bytes SRAM, In-Circuit Download, JTAG based Debug, Software triggered in-circuit re-programmability, UART, dual I2C and SPI Serial I/O, 14-Pin GPIO Port, 2 X General Purpose Timers, Wake-up and Watchdog Timers, Power Supply Monitor, PLA C Programmable Logic (Array), Power Specified for 3V operation, Active Mode: 6mW (@1MHz) 300mW (@45MHz), Fully specified for C40°C to 85°C operation; JTAG connector for in-circuit programming and debugging with ARM-JTAG USB-RS232 convertor and interface to ADuC7020, can be used for serial download I2C connector RESET supervisor IC and button SERIAL DOWNLOAD (bootloader enable) button two buttons LCD 16x2 display with BACKLIGHT 32 768 Hz oscillator crystal power supply filtering capacitor and ferite bead extension header for ADC and DAC ports PCB: FR-4, 1.5 mm (0,062"), green soldermask, white silkscreen component print实验板软件 RS232 initialization for EW-ARM LCD, DAC demo code for EW-ARM LCD write for EW-ARM ADC read DAC write demo code for EW-ARM Blink LED demo code for EW-ARM RS232 , UART, demo code for EW-ARM DAC sinusoidal generation demo code for EW-ARM SPI demo code for EW-ARM Basic initializations for ADUC7020 demo code for EW-ARM ……