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ADI ADuC7060模拟微控制器开发方案

来源： eccn

2019-05-21

类别：工业控制

115

拍明

原标题：ADI ADuC7060模拟微控制器开发方案

　　ADI公司的ADuC7060/ADuC7061是低功耗全集成的8 kSPS,24位数据采集系统，在单芯片上集成高性能多通道Σ-Δ型模数转换器(ADC)，16位/32位ARM7TDMI® MCU和Flash/EE存储器,包括有4个定时器,高级矢量中断控制器, 工作电压2.375 V至2.625 V，工作温度范围为−40℃至+125℃,主要用在工业自动化和过程控制,智能精密检测系统和4 mA至20 mA环路智能传感器。本文介绍了ADuC706x系列主要特性,功能框图,模拟框图以及ADuC7060评估板主要特性,电路图,材料清单和PCB元件布局图.

　　The ADuC706x series are fully integrated, 8 kSPS, 24-bit data acqui-sition systems incorporating high performance multichannel sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), 16-bit/ 32-bit ARM7TDMI®MCU, and Flash/EE memory on a single chip.

　　The ADCs consist of a primary ADC with two differential pairs or four single-ended channels and an auxiliary ADC with up to seven channels. The ADCs operate in single-ended or differential input mode. A single-channel buffered voltage output DAC is available on chip. The DAC output range is programmable to one of four voltage ranges.

　　The devices operate from an on-chip oscillator and a PLL gene-rating an internal high frequency clock up to 10.24 MHz. The microcontroller core is an ARM7TDMI, 16-bit/32-bit RISC machine offering up to 10 MIPS peak performance; 4 kB of SRAM and 32 kB of nonvolatile Flash/EE memory are provided on chip. The ARM7TDMI core views all memory and registers as a single linear array.

　　The ADuC706x contains four timers. Timer1 is a wake-up timer with the ability to bring the part out of power saving mode. Timer2 is configurable as a watchdog timer. A 16-bit PWM with six output channels is also provided. The ADuC706x contains an advanced interrupt controller. The vectored interrupt controller (VIC) allows every interrupt to be assigned a priority level. It also supports nested interrupts to a maximum level of eight per IRQ and FIQ. When IRQ and FIQ interrupt sources are combined, a total of 16 nested interrupt levels is supported. On-chip factory firmware supports in-circuit serial download via the UART serial interface ports and nonintrusive emulation via the JTAG interface. The parts operate from 2.375 V to 2.625 V over an industrial temperature range of −0℃ to +125℃.

　　ADuC706x系列主要特性:

　　Analog input/output

　　Dual (24-bit) ADCs

　　Single-ended and differential inputs

　　Programmable ADC output rate (4 Hz to 8 kHz)

　　Programmable digital filters

　　Built-in system calibration

　　Low power operation mode

　　Primary (24-bit) ADC channel

　　2 differential pairs or 4 single-ended channels

　　PGA (1 to 512) input stage

　　Selectable input range: ±2.34 mV to ±1.2 V

　　30 nV rms noise

　　Auxiliary (24-bit) ADC: 4 differential pairs or 7 single-ended channels

　　On-chip precision reference (±10 ppm/°C)

　　Programmable sensor excitation current sources

　　200 μA to 2 mA current source range

　　Single 14-bit voltage output DAC

　　Microcontroller

　　ARM7TDMI core, 16-/32-bit RISC architecture

　　JTAG port supports code download and debug

　　Multiple clocking options

　　Memory

　　32 kB (16 kB × 16) Flash/EE memory, including 2 kB kernel

　　4 kB (1 kB × 32) SRAM

　　Tools

　　In-circuit download, JTAG based debug

　　Low cost, QuickStart™development system

　　Communications interfaces

　　SPI interface (5 Mbps)

　　4-byte receive and transmit FIFOs

　　UART serial I/O and I2C (master/slave)

　　On-chip peripherals

　　4× general-purpose (capture) timers including

　　Wake-up timer

　　Watchdog timer

　　Vectored interrupt controller for FIQ and IRQ

　　8 priority levels for each interrupt type

　　Interrupt on edge or level external pin inputs

　　16-bit, 6-channel PWM

　　General-purpose inputs/outputs

　　Up to 14 GPIO pins that are fully 3.3 V compliant

　　Power

　　AVDD/DVDD specified for 2.5 V (±5%)

　　Active mode: 2.74 mA (@ 640 kHz, ADC0 active)

　　10 mA (@ 10.24 MHz, both ADCs active)

　　Packages and temperature range

　　Fully specified for −40℃to +125℃ operation

　　32-lead LFCSP (5 mm × 5 mm)

　　48-lead LFCSP and LQFP

　　Derivatives

　　32-lead LFCSP (ADuC7061)

　　48-lead LQFP and 48-lead LFCSP (ADuC7060)

　　ADuC706x系列应用:

　　Industrial automation and process control

　　Intelligent, precision sensing systems, 4 mA to 20 mA loop-based smart sensors

　　图1.ADuC706x系列功能框图

　　图2.ADuC706x系列模拟框图

　　ADuC7060评估板

　　This user guide refers to the ADuC7060 evaluation board. This evaluation board allows evaluation of the ADuC7060 and ADuC7061 parts. The ADuC7060 is the superset of the ADuC706x series, and all features of the ADuC7061 can be evaluated using the ADuC7060. The ADuC7060 contains an ARM7TDMI core, 32 kB of flash, 4 kB of SRAM, dual 24-bit sigma-delta (Σ-Δ) ADCs, and a 12-bit DAC as well as many other features.

　　This evaluation board allows a user to program the ADuC7060 via the JTAG or the UART interfaces. The user may also debug their source code through the JTAG interface.

　　In this user guide, all references to the physical orientation of components on the board are made with respect to a component-side view of the board with the prototype area appearing in the bottom of the board.

　　The board is laid out to minimize coupling between the analog and digital sections of the board. To this end, the ground plane is split with the analog section on the left side and a digital plane on the right side of the board. The regulated 2.5 V power supply is routed directly to the digital section and is filtered before being routed into the analog section of the board.

　　ADuC7060评估板主要特性:

　　2-layer PCB (4 in. × 5 in. form factor)

　　9 V power supply regulated to 3.3 V and 2.5 V on board

　　4-pin UART header to connect to RS-232 interface cable

　　20-pin standard JTAG connector

　　Demonstration circuit

　　32.768 kHz watch crystal to drive the PLL clock

　　ADR280 1.2 V external reference chip

　　Reset/download/IRQ0 push buttons

　　Power indicator/general-purpose LEDs

　　Access to all ADC inputs and DAC output from external header; all device ports are brought out to external header pins

　　Surface-mount and through-hole general-purpose prototype area