R5F521A8BGFN中文资料瑞萨数据手册PDF规格书

■ 32-bit RX CPU core

 Max. operating frequency: 50 MHz

Capable of 78 DMIPS in operation at 50 MHz

 Accumulator handles 64-bit results (for a single

instruction) from 32- × 32-bit operations

 Multiplication and division unit handles 32- × 32-bit

operations (multiplication instructions take one CPU

clock cycle)

 Fast interrupt

 CISC Harvard architecture with 5-stage pipeline

 Variable-length instructions, ultra-compact code

 Memory protection unit

 On-chip debugging circuit

■ Low power design and architecture

 Operation from a single 1.8-V to 3.6-V supply

(2.7 V to 3.6 V for the ΔΣ A/D converter operating

voltage)

 Deep software standby mode with RTC remaining usable

 Four low power modes

■ 24-bit ΔΣ A/D Converter

 SNDR = 85dB

 Seven ΔΣ converter units available. Seven channels can

be operated simultaneously or independently.

 Up to x 64 PGA gain for differential input

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

 50-MHz operation, 20-ns read cycle

 No wait states for reading at full CPU speed

 256-K to 512-Kbyte capacities

 User code programmable via the SCI

 Programmable at 1.8 V

 For instructions and operands

■ On-chip data flash memory

 8 Kbytes

(Number of times of reprogramming: 100,000)

 Erasing and programming impose no load on the CPU.

■ On-chip SRAM, no wait states

 32-K to 64-Kbyte size capacities

■ DMA

 DMAC: Incorporates four channels

 DTC: Four transfer modes

■ Reset and supply management

 Nine types of reset, including the power-on reset (POR)

 Low voltage detection (LVD) with voltage settings

■ Clock functions

 Frequency of external clock: Up to 20 MHz

 Frequency of the oscillator for sub-clock generation:

32.768 kHz

 PLL circuit input: 4 MHz to 12.5 MHz

 On-chip low- and high-speed oscillators, dedicated onchip

low-speed oscillator for the IWDT

 Generation of a dedicated 32.768-kHz clock for the RTC

 Clock frequency accuracy measurement circuit (CAC)

■ Real-time clock

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

 Year and month display or 32-bit second display (binary

counter) is selectable

 Time capture on event-signal input through external pins

 RTC capable of initiating return from deep software

standby mode