拥有RX系列中的最高性能与最大存储容量，并以单芯片实现控制及通信功能
全球领先的半导体解决方案供应商瑞萨电子株式会社（TSE：6723）宣布推出RX微控制器（MCU）系列RX72M产品组，产品内置用于工业以太网通信的EtherCAT®从站控制器。瑞萨RX家族中的这一全新旗舰产品组为需要控制和通信功能的工业设备，如紧凑型工业机器人、可编程逻辑控制器、远程I/O及工业网关等带来具备大内存容量的高性能、单芯片解决方案。
EtherCAT在工业以太网中的应用正迅速增长，目前多采用专用MCU、IC，以及面向EtherCAT通信的高端系统级芯片（SoC）等器件。全新RX72M产品组性能优越，在240MHz主频运行时，EEMBC®基准下的CoreMark评分高达1396（注1）；可同时实现应用处理和EtherCAT通信。该产品组将电机控制MCU与片上EtherCAT从站功能相结合，使工业应用开发人员能够降低物料清单成本（BOM）并支持工业设备设计所需的小型化要求。
瑞萨电子工业自动化事业部副总裁傅田明表示，“电路板小型化对电路板板载空间的限制日益严苛，已成为工业机器人设计师面临的一个关键问题，而RX72M产品组为这一挑战带来了革命性解决方案。作为全球领先的MCU供应商和工业网络解决方案提供商，瑞萨很高兴推出RX72M产品，分享我们丰富的嵌入式设计专业知识。与早期产品相比，该新产品将电路板面积减少约50%，同时保持高性能和对EtherCAT通信的支持，为客户铺就简单灵活的工业设备设计之路。”
RX72M产品组是首款包含EtherCAT从站控制器的RX系列MCU，具有RX系列中最高的SRAM容量——1 MB SRAM及4 MB闪存。大容量SRAM允许MCU在不使用外部存储的情况下高速运行多个中间件系统，如TCP / IP、网页服务器和文件系统。它还为支持未来的功能扩展带来了灵活性，如无需额外存储器即可支持OPC统一结构（OPC UA，注2）标准。片上闪存还可作为两块2MB的闪存独立运行，从而使终端设备能够稳定运行；如在一块闪存中执行程序时，可同时在另一块闪存中进行后台重写。
RX72M产品组的关键特性：
• RX系列MCU中首款集成EtherCAT从站控制器的产品
• 可支持工业以太网通信在240MHz运行时高达1396CoreMark评分的高性能，首款集成嵌入式双精度浮点单元（FPU）的RX系列MCU
• 高速闪存系统，支持高达120 MHz速率，创造高性能和低可变性的运行环境
• 专用三角函数（sin、cos、arctan和hypot）加速器和寄存器组保存功能，实现高精度电机控制——即拥有与瑞萨RX72T电机控制MCU相同的功能
• 可靠的加密机制，如用于保护密钥的硬件加密模块和内存保护功能——可以防止应用程序系统在未经授权的情况下被复制，并支持对真实设备的身份验证
• 灵活的封装选择，包括176引脚LQFP封装和176引脚BGA封装，以及RX系列MCU中首款224引脚BGA封装，可为尺寸受限的设计节省额外的空间
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RX72T主要特性:
■ 32-bit RXv3 CPU core
Maximum operating frequency: 200 MHz
Capable of 1160 CoreMark in operation at 200 MHz
JTAG and FINE (one-line) debugging interfaces
A function for collectively saving the values of registers is available.
■ Low-power design and architecture
Operation from a single 2.7- to 5.5-V supply
Four low-power modes
■ On-chip code flash memory
Supports versions with 1 Mbytes/512 Kbytes
No wait cycles at up to 120 MHz or when the ROM cache is hit
User code is programmable by on-board or off-board programming.
■ On-chip data flash memory
32 Kbytes, reprogrammable up to 100,000 times
Programming/erasing as background operations (BGOs)
■ On-chip SRAM, no wait states
128Kbytes of SRAM (no wait states)
16 Kbytes of RAM with ECC (with wait)
■ Data transfer
DMACa: 8 channels
DTCa: 1 channel
■ ELC
Module operation can be initiated by event signals without usinginterrupts
Linked operation between modules is possible when the CPU is insleep mode
■ Reset and supply management
Power-on reset (POR)
Low voltage detection (LVDA) with voltage settings
■ Clock functions
Frequency of resonator for main clock oscillator: 8 to 24 MHz (thiscan be used as the PLL reference clock)
High-speed on-chip oscillator: 16 MHz/18 MHz/20 MHz (this canbe used as the PLL reference clock)
Low-speed on-chip oscillator: 240 kHz
■ Independent watchdog timer
120-kHz IWDT-dedicated on-chip oscillator clock operation
■ Useful functions for IEC60730 compliance
Oscillation-stoppage detection, functions for self-diagnosis anddetection of disconnection for the A/D converter, clock frequencyaccuracy measurement circuit, independent watchdog timer, RAMtest-assisting function by DOC, and CRCA,etc.
Register write protection function can protect values in importantregisters against overwriting.
■ External bus
Bus clock at 40 MHz (max)
Four CS areas
8- or 16-bit bus space is selectable per area
■ Various communications interfaces
Host/function or OTG controller (1 channel) with full-speed USB2.0 (USBb) transfer
CAN (compliant with ISO11898-1), incorporating 32 mailboxes(1 channel)
SCIj and SCIh with multiple functionalities (up to 6 channels)
Choose from among asynchronous mode, clock-synchronous mode,smart-card interface mode, simplified SPI, simplified I2C, andextended serial mode.
SCIi with 16-byte transmission and reception FIFOs (1 channel)
I2C bus interface (RIICa) for transfer at up to 400 kbps (fast mode),capable of SMBus operation (1 channel)
RSPId (1 channel) for transfer at up to 30 Mbps
■ Up to 31 extended-function timers
32-bit GPTW (10 channels): operation at 200 MHz, input capture,output compare, PWM waveforms: 10 output channels in singlephasecomplementary PWM mode/3 output channels in 3-phasecomplementary PWM mode/2 output channels in 5-phasecomplementary PWM mode, phase-counting mode, linkage withcomparator (counting operation, PWM negate control)
16-bit MTU3d (9 channels): operation at 200 MHz, input capture,output compare, PWM waveforms: 2 output channels in 3-phasecomplementary PWM mode, phase-counting mode
8-bit TMR (8 channels)
16-bit CMT (4 channels)
■ High-resolution PWM waveform generation circuit(HRPWM): 4 channels
Controlling the timing of rising or falling of the PWM outputwaveform for 32-bit GPTW is realized with minimum of 195 psresolution (in operation at 160 MHz)
■ 12-bit A/D converter (S12ADH):
total of 30 channels for three units
Up to three 12-bit units of sample-and-hold circuit included
Unit 0 (8 channels for 3 sample-and-hold circuits),
Unit 1 (8 channels for 3 sample-and-hold circuits),
Unit 2 (14 channels)
Programmable gain amplifier with pseudo differential amplification(3 channels × 2)
■ Analog Comparator (CMPC): 6 channels
■ 12-bit D/A converter: 2 channels
Usable as a reference voltage for the analog comparator
■ Temperature sensor for measuring temperaturewithin the chip
■ Encryption functions (Trusted Secure IP Lite)
128- or 256-bit key length of AES for ECB, CBC, GCM, others
True random number generator
Unauthorized access to the encryption engine is disabled andimposture and falsification of information are prevented
Safe management of keys
■ Up to 110 pins for general I/O ports
5-V tolerance, open drain, input pull-up, switchable driving ability
■ Recommended operating temp. range (Topr)
–40 C to +85 C
–40 C to +105 C
