Renesas公司的RX630系列是32位MCU,工作頻率最大為100MHz,100MHz時(shí)的性能為165 DMIPS,具有單精度32位IEEE-754浮點(diǎn),兩種類型的乘法和累加器,工作電壓2.7V-3.6V,主要用在嵌入式系統(tǒng).本文介紹了RX630系列主要特性,方框圖,RX630系列評估板主要特性與指標(biāo),方框圖,電路圖和元件布局圖.

RX630系列主要特性:

■ 32-bit RX CPU core

Max. operating frequency: 100 MHz

Capable of 165 DMIPS in operation at 100 MHz

Single precision 32-bit IEEE-754 floating point

Two types of multiply-and-accumulation unit (between memories and between registers)

32-bit multiplier (fastest instruction execution takes one CPU clock cycle)

Divider (fastest instruction execution takes two CPU clock cycles)

Fast interrupt

CISC Harvard architecture with 5-stage pipeline

Variable-length instructions: Ultra-compact code

Supports the memory protection unit (MPU)

JTAG and FINE (two-line) debugging interfaces

■ Low-power design and architecture

Operation from a single 2.7- to 3.6-V supply

Low power consumption: A product that supports all peripheral functions draws only 500 μA/MHz.

RTC is capable of operation from a dedicated power supply (min. operating voltage: 2.3 V).

Four low-power modes

■ On-chip main flash memory, no wait states

100-MHz operation, 10-ns read cycle (no wait states)

384-Kbyte to 2-Mbyte capacities

User code programmable via the USB, SCI, or JTAG

■ On-chip data flash memory

Max. 32 Kbytes, reprogrammable up to 100,000 times

Programming/erasing as background operations (BGOs)

■ On-chip SRAM, no wait states

32- to 128-Kbyte capacities

For instructions and operands

Can provide backup on deep software standby

■ DMA

DMAC: Incorporates four channels

DTC

■ Reset and supply management

Power-on reset (POR)

Low voltage detection (LVD) with voltage settings

■ Clock functions

External crystal oscillator or internal PLL for operation at 4 to 16 MHz

Internal 125-kHz LOCO and 50-MHz HOCO

Dedicated 125-kHz LOCO for the IWDT

Frequency of the oscillator for sub-clock generation: 32 kHz

■ Real-time clock

Adjustment functions (30 seconds, leap year, and error)

Time capture function (for capturing times in response to event-signal input on external pins)

■ Independent watchdog timer

125-kHz LOCO clock operation

■ Useful functions for IEC60730 compliance

Oscillation-stop detection, frequency measurement, CRC, IWDT, self-diagnostic function for the A/D converter, etc.

■ Up to 22 communications interfaces

USB 2.0 full-speed function interface (1 channel)

CAN (compliant with ISO11898-1), incorporating 32 mailboxes (up to 3 channels)

SCI with multiple functionalities (up to 13 channels)

Choose from among asynchronous mode, clock-synchronous mode, smart-card interface mode, simple SPI, simple I2C, and extended serial mode.

I2C bus interface for transfer at up to 1 Mbps (up to 4 channels)

RSPI for high-speed transfer (up to 3 channels)

■ External address space

8 CS areas (8 × 16 Mbytes)

Multiplexed address data or separate address lines are selectable per area.

8-, 16-, or 32-bit bus space is selectable per area

■ Up to 20 extended-function timers

16-bit MTU2: input capture, output capture, complementary PWM output, phase-counting mode (6 channels)

16-bit TPU: input capture, output capture, phase-counting mode (12 channels)

8-bit TMR (4 channels)

16-bit compare-match timers (4 channels)

■ A/D converter for 1-MHz Operation

Up to 21 12-bit channels, and incorporating 1 sample-and-hold circuit

Up to 8 10-bit channels, and incorporating 1 sample-and-hold circuit

Addition of results of A/D conversion (in the 12-bit A/D converter)

Self diagnosis (for the 10-bit A/D converter)

■ 10-bit D/A converter: 2 channels

■ Temperature sensor for measuring temperature within the chip

■ Register write protection function can protect values in important registers against overwriting.

■ Up to 148 pins for GPIO

5-V tolerance, open drain, input pull-up, switchable driving ability

■ Operating temp. range

–40 degree C to +85 degree C