原标题：Renesas RX111超低功耗32位MCU入门开发方案

　　Renesas公司的RX111系列产品是超低功耗32位RX mcu,CPU核的工作频率32MHz,具有50DMIPS性能,集成了USB连接,8kB数据闪存,DAC和通信信道,工作电压1.8V-3.6V,主要用在家用电器,建筑物自动化和储存与存储器.本文介绍了RX111系列产品主要特性,框图, RX111入门套件主要特性,框图和调试连接框图,电路图以及元件布局图.

　　The RX111 group offers ultra low power operation, a fast wake-up time, safety features and more. The RX111 adds USB connectivity, 8KB data Flash, a DAC, and communication channels. Pin counts in the RX111 series are as low as 36 pins and the on-chip Flash memory is from 16KB to up to 128KB.

　　RX111系列产品主要特性:

　　■ 32-bit RX CPU core

　　 32 MHz maximum operating frequency Capable of 50 DMIPS when operating at 32 MHz

　　 Accumulator handles 64-bit results (for a single instruction) from 32-bit × 32-bit operations

　　 Multiplication and division unit handles 32-bit × 32-bit operations (multiplication instructions take one CPU clock cycle)

　　 Fast interrupt

　　 CISC Harvard architecture with five-stage pipeline

　　 Variable-length instruction format, ultra-compact code

　　 On-chip debugging circuit

　　■ Low power consumption functions

　　 Operation from a single 1.8 to 3.6 V supply

　　 Three low power consumption modes

　　■ On-chip flash memory for code, no wait states

　　 Operation at 32 MHz, read cycle of 31.25 ns

　　 No wait states for reading at full CPU speed

　　 16 to 128 Kbyte capacities

　　 Programmable at 1.8 V

　　 For instructions and operands

　　■ On-chip data flash memory

　　 8 Kbytes 1,000,000 Erase/Write cycles (typ.)

　　 BGO (Background Operation)

　　■ On-chip SRAM, no wait states

　　 8 to 16 Kbyte capacities

　　■ Data transfer controller (DTC)

　　 Four transfer modes

　　 Transfer can be set for each interrupt source.

　　■ Event link controller (ELC)

　　 Module operation can be initiated by event signals without going through interrupts.

　　 Link operation between modules is possible while the CPU is sleeping.

　　■ Reset and power supply voltage management

　　 Six types including Power-On Reset (POR)

　　 Low voltage detection (LVD) with voltage settings

　　■ Clock functions

　　 External clock input frequency: Up to 20 MHz

　　 Main clock oscillator frequency: 1 to 20 MHz

　　 Sub-clock oscillator frequency: 32.768 kHz

　　 PLL circuit input: 4 to 8 MHz

　　 Low-speed on-chip oscillator: 4 MHz

　　 High-speed on-chip oscillator: 32 MHz

　　 IWDT-dedicated on-chip oscillator: 15 kHz

　　 Generate a dedicated 32.768-kHz clock for the RTC

　　 On-chip clock frequency accuracy measurement circuit (CAC)

　　■ Realtime clock (RTC)

　　 30-second, leap year, and error adjustment functions

　　 Calendar count mode or binary count mode selectable

　　 Capable of initiating exit from software standby mode

　　■ Independent watchdog timer (IWDT)

　　 15-kHz on-chip oscillator produces a dedicated clock signal to drive IWDT operation.

　　■ On-chip functions for IEC 60730 compliance

　　 Clock frequency accuracy measurement circuit, IWDT, functions to assist in RAM testing, etc.

　　■ Up to six channels for communication

　　 USB: USB 2.0 host (32 Kbyte or more ROM)/function/On-The-Go (OTG) (one channel), full-speed = 12 Mbps,low-speed = 1.5 Mbps, isochronous transfer, and BC (Battery Charger) supported

　　 SCI: Asynchronous mode, clock synchronous mode,smart card interface (up to three channels)

　　 I2C bus interface: Transfer at up to 400 kbps, capable of SMBus operation (one channel)

　　 RSPI (one channel)

　　■ Up to 8 extended-function timers

　　 16-bit MTU: Input capture/output compare, complementary PWM output, phase counting mode (six channels)

　　 16-bit CMT (two channels)

　　■ 12-bit A/D converter

　　 Up to 14 channels

　　 1.0 μs minimum conversion speed

　　 Double trigger (data duplication) function for motor control

　　■ 8-bit D/A converter

　　 Two channels (for 64 pins only)

　　■ Temperature sensor

　　■ General I/O ports

　　 5-V tolerant, open drain, input pull-up

　　■ Multi-function pin controller (MPC)

　　 Multiple I/O pins can be selected for peripheral functions.

　　■ Operating temperature range

　　 40 to 85C

　　 40 to 105°C

　　图1. RX111系列框图

　　RX111入门套件

　　The Renesas Starter Kit for RX111 is intended as a user-friendly introductory and evaluation tool for the RX111 microcontroller. The board also provides a useful platform for evaluating the Renesas suite of development tools for coding and debugging, using CubeSuite+.

　　Renesas Starter Kit for RX111 may be connected to the host PC using the included USB E1 on chip debugging interface.

　　The purpose of the board is to enable the user to evaluate the capabilities of the device and its peripherals by giving the user a simple platform on which code can be run only minutes from opening box. It can also prove an invaluable tool in development by providing a useful test platform for code already debugged using one of our more powerful emulation tools.

　　RX111入门套件主要特性:

　　• Renesas microcontroller programming

　　• User code debugging

　　• User circuitry such as switches, LEDs and a potentiometer

　　• Sample application

　　• Sample peripheral device initialisation code

　　The RSK board contains all the circuitry required for microcontroller operation.

　　图2.RX111入门套件外形图

　　图3.RX111入门套件框图

　　图4.RX111入门套件调试连接框图

　　图5.RX111入门板布局图