1.Summary

RN8318：Integrated ARM Cortex-M0 core, 512KB Flash, 32KB SRAM, independent power supply hardware temperature compensation RTC and LCD support 8*36/6*38/4*40. Packaging LQFP128, typical application fields:  State Grid 698 protocol three-phase meter (using LCD) and overseas high-end three-phase meter.

RN8615：Integrated ARM Cortex-M0 core, 512KB Flash, 32KB SRAM, independent power supply hardware temperature compensation RTC and LCD support 8*30/6*32/4*34. Packaging LQFP100, typical application fields: State Grid 698 protocol single-phase meter (using LCD), State Grid 698 protocol three-phase meter (not using LCD) and overseas high-end single three-phase meter.

RN8613：Integrated ARM Cortex-M0 core, 256KB Flash, 32KB SRAM, independent power supply hardware temperature compensation RTC and LCD support 8*30/6*32/4*34. Packaging LQFP100, typical application fields: State Grid 698 protocol single-phase meter (using LCD) and overseas high-end single three-phase meter.

RN8612：Integrated ARM Cortex-M0 core, 128KB Flash, 8KB SRAM, 32KB EEPROM, independent power  supply hardware temperature compensation RTC and LCD support 8*30/6*32/4*34. Packaging LQFP100, typical  application fields: South Grid meter and overseas single-phase meter.

RN8611：Integrated ARM Cortex-M0 core, 256KB Flash, 32KB SRAM, independent power supply hardware temperature compensation RTC and not support LCD. Packaging LQFP80, typical application fields: State Grid 698  protocol single-phase meter (not using LCD).

RN8610B：Integrated ARM Cortex-M0 core, 128KB Flash, 8KB SRAM, independent power supply hardware temperature compensation RTC and not support LCD. Packaging LQFP64.

2.Fundamental Features:

n Highly integrated: 32bit ARM M0 CPU+maximum 512KB Flash/32KB SRAM+independent power supply hardware temperature compensation RTC+LCD controller;

n Wide voltage range: Under typical conditions, voltage range of 2.3V~5.5V ensures the normal operation of CPU;

Under typical conditions, voltage range of 2.7V~5.5V ensures the accuracy of RTC.

Under typical conditions, voltage range of 1.8V~5.5V is maintained for the perpetual calendar time;

High performance: Under the condition of 32768 single crystal oscillator, the highest working frequency of CPU is 14.7456MHz (32KHz, 1.8432MHz, 7.3728MHz and 14.7456MHz are optional). Under the condition of 32768 crystal oscillator+external high-frequency crystal oscillator, the highest working frequency of CPU is 29.4912mhz (32KHz, 1.8432MHz, 7.3728MHz, 14.7456MHz and 29.4912MHz are optional).

Low power:

The power consumption of CPU subsystem at 32KHz is better than 18μA (with cache);

The total power consumption of the chip in sleep mode is about 7μA (RTC automatic temperature compensation; 

Ram to keep; CPU and digital peripherals do not lose power; Interrupt wake up);

The typical power consumption in VBAT domain is about 1.5μA.

The power consumption of LCD is about 5μA, and the constant chip’s is 13uA (resistance series voltage division mode, including 6COM display power consumption);

The power consumption of LCD is about 10μA, and the constant chip’s is 18uA (charge pump mode, including 8COM display power consumption);

n High precison: The second pulse error of RTC in the whole temperature range (-40℃~85℃) is less than 10 ppm; 

RTC can still guarantee the accuracy of second pulse under the condition of battery power supply.

Package type：

RN8318 LQFP128

RN8613/RN8612 LQFP100

RN8611 LQFP80

RN8610B LQFP64

Processor-related:

n ARM Cortex-M0 core;

n RN8318: 512KB FLASH memory; RN8615: 512KB FLASH memory;

n RN8613/RN8611: 256KB FLASH memory; RN8612/RN8610B:128KB FLASH memory;

n RN8612/RN8610B supply 8KBytes SRAM (all open to users);

n RN8612/RN8610B supply 32KBytes EEPROM, supporting word programming (not byte programming), 1  million programming cycle;

n Other series provide 32kbytes SRAM, of which 2kbytes is used as Cache;

n Single-cycle multiplier(32bit*32bit);

n System timer is embedded in the CM0;

n Support for external interrupts and other ways to wake up;

n Complete hardware and software for the integrated development environment is provided.

RTC:

n Hardware’s automatic temperature compensation, precision and power consumption meet the national standard, and CPU is not required to participate in the temperature compensation;

n Accurate 1Hz output under battery power supply;

n Temperature Sensor: Provide accurate temperature, temperature measurement accuracy is ±1℃ in the range of  -25℃ ~70℃;

n RTC perpetual calendar and automatic temperature compensation circuit are powered by VBAT pin 

independently;

n The typical power consumption in VBAT domain is better than 1.5μA;

n The opening temperature compensation time is about 2ms, and the typical power consumption of temperature is  250μA. if it is opened once in 30 seconds, the average power consumption is 0.016μA.

LCD:

n RN8318: 4*40, 6*38 and 8*36;

n RN8615/RN8613/RN8612: 4*34, 6*32 and 8*30;

n RN8612 only supports resistance voltage division mode. Other series support ChargePUMP and built-in  resistance column voltage division mode. 6COM/3V screen is recommended under resistance column voltage division mode;

n If you need to support more segments, you can choose 8COM/5V screen (Charge pump mode); if you need lower display power consumption, you can choose 6COM/3V screen (resistor series voltage sharing mode). Both are compatible in hardware, just change the software configuration;

n The power sonxumption of LCD module is better than 5μA (resistor series voltage division scheme).

Other peripherals

n High speed GPIO, supports interface of peripheral devices with different voltage: RN8318: 93;  

RN8615/RN8613/RN8612: 64; RN8611: 65; RN8610B: 50;

n 10bit ADC: Temperature sensor / battery voltage detection / generic ADC time division multiplexing;

n Voltage detecting LVD: chip supply voltage detection; external voltage detection.

n Two low power comparators CMP: external voltage detection.

n Extended timer: two 32bit timers.

n UART：6, supporting automatic baud rate, supporting infrared modulation, supporting UART wakes up, supporting level reversal.

n 7816 port:2.

n I2C:1.

n SPI:1.

n Hardware watchdog.

n Button Interrupts: 8, pin multiplexing.

n External interrupts: 8, pin multiplexing.

Encryption:

n Hardware true random number generator meets U.S. NIST FIPS140-2 standard;

n AES128/192/256 hardware encryption meets the FIPS197 standards, supporting EBC/CBC/CTR/GCM/GMAC  mode;

n ECC192 hardware accelerators;

n RN8612 does not support encryption;

n Encryption documentation refers to Renergy application notes.