RX71M中文资料瑞萨数据手册PDF规格书

Features

■ 32-bit RXv2 CPU core

 Max. operating frequency: 240 MHz

Capable of 480 DMIPS in operation at 240 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 (one-line) debugging interfaces

■ Low-power design and architecture

 Single voltage supply: 2.7 to 3.6 V

 Low power consumption: A product that supports all peripheral

functions draws only 0.2mA/MHz (Typ.).

 RTC is capable of operation from a dedicated power supply.

 Four low-power modes

■ On-chip code flash memory

 Up to 4 Mbyte

 No wait states at up to 120 MHz or when the AFU is hit, one wait

state at above 120 MHz and when the AFU is missed

 User code is programmable by on-board or off-board programming.

 Background programming/erasing (BGO:Background operation)

■ On-chip data flash memory

 64 Kbytes, reprogrammable up to 100,000 times

 Background programming/erasing (BGO:Background operation)

■ On-chip SRAM

 512 Kbytes of SRAM (no wait states except in the 256 Kbytes from

0004 0000h to 0007 FFFFh when ICLK is set to 120 MHz or faster)

 32 Kbytes of RAM with ECC (single-error correction and double

error detection)

 8 Kbytes of standby RAM (backup on deep software standby)

■ Data transfer

 DMAC: 8 channels

 DTC

 EXDMAC: 2 channels

 DMAC for the Ethernet controller: 3 channels for 176- and 177-pin

products; 2 channels for 100-, 144-, and 145-pin products

■ Reset and supply management

 Power-on reset (POR)

 Low voltage detection (LVD) with voltage settings

■ Clock functions

 External crystal resonator or internal PLL for operation at 8 to 24

MHz

 Internal 240-kHz LOCO and HOCO selectable from 16, 18, and 20

MHz

 120-kHz clock for the IWDTa

■ Real-time clock

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

 Real-time clock counting and binary counting modes are selectable

 Time capture function

(for capturing times in response to event-signal input)

■ Independent watchdog timer

 120-kHz (1/2 LOCO frequency) clock operation

■ Useful functions for IEC60730 compliance

 Oscillation-stoppage detection, frequency measurement, CRC,

IWDTa, self-diagnostic function for the A/D converter, etc.

 Register write protection function can protect values in important

registers against overwriting.