ADI的ARM开发板电路原理图(ADuC7020-IO开发板)

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 source

45MHz 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

RS232 interface circuit and connector

I2C connector

RESET button

SERIAL DOWNLOAD (bootloader enable) button

LED status

power supply circuit with plug-in power jack and diode protection

32 768 Hz oscillator crystal

4 RELAYs with 10A/250VAC NO and NC contacts with screw terminals

extension header for ADC and DAC ports

PCB: FR-4, 1.5 mm (0,062"), green soldermask, white silkscreen component print

four mounting holes 3.3 mm (0.13")

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