General Features- **High Integration**: 32-bit ARM Cortex‑M0 CPU, up to 512KB Flash / 32KB SRAM, independently powered hardware temperature-compensated RTC, and built-in LCD controller. - **Wide Voltage Range**:  CPU operates normally at 2.3V~5.5V under typical conditions;  RTC maintains accuracy at 2.7V~5.5V under typical conditions;  Calendar time retention works at 1.8V~5.5V under typical conditions. - **High Performance**:  With only a 32768 Hz crystal, the CPU maximum frequency reaches 14.7456MHz (optional: 32KHz, 1.8432MHz, 7.3728MHz, 14.7456MHz).  With 32768 Hz crystal plus external high-frequency crystal, the CPU maximum frequency reaches 29.4912MHz (optional: 32KHz, 1.8432MHz, 7.3728MHz, 14.7456MHz, 29.4912MHz). - **Low Power Consumption**:  CPU subsystem current consumption is less than 18μA at 32KHz with cache enabled;  Chip overall sleep current is about 7μA (RTC automatic temperature compensation enabled, RAM retention, CPU and digital peripherals powered on, interrupt wake-up supported);  Typical VBAT domain current is about 1.5μA;  LCD current about 5μA, total chip current about 13μA in always-on mode (resistor divider mode, including 6COM display);  LCD current about 10μA, total chip current about 18μA in always-on mode (charge pump mode, including 8COM display). - **High Precision**:  RTC second pulse error less than 10ppm over full temperature range of -40℃ ~ 85℃;  RTC keeps second pulse accuracy even under battery power supply. - **Package Form**:  RN8318: LQFP128  RN8615 / RN8613 / RN8612: LQFP100  RN8611: LQFP80 Processor - ARM Cortex‑M0 core. - RN8318 / RN8615: 512KB Flash. - RN8613 / RN8611: 256KB Flash; RN8612: 128KB Flash. - RN8612 equipped with 8KB SRAM fully available for user application. - RN8612 integrates 32KB EEPROM with word-level programming (not byte-level), endurance up to 1,000,000 cycles. - Other models equipped with 32KB SRAM, of which 2KB is used as Cache. - Built-in single-cycle 32bit×32bit multiplier. - Embedded system timer inside Cortex‑M0. - Supports multiple wake-up methods including external interrupt. - Complete integrated software and hardware development environment provided.RTC- Automatic hardware temperature compensation without CPU participation, meeting standard accuracy and power consumption requirements. - Maintains precise 1Hz clock output under battery supply. - Built-in temperature sensor with ±1℃ accuracy within -25℃ ~ 70℃. - RTC calendar and automatic temperature compensation circuit independently powered by VBAT pin. - Typical VBAT domain current consumption better than 1.5μA. - Temperature compensation startup time less than 1ms; typical compensation current 250μA. When enabled every 30 seconds, the average power consumption is only 0.0083μA.LCD Controller- RN8318: 4×40, 6×38, 8×36. - RN8615 / RN8613 / RN8612: 4×34, 6×32, 8×30. - RN8612 only supports resistor divider mode; other models support both charge pump and internal resistor divider mode. Resistor divider mode is recommended for 6COM / 3V LCD panels. - For more segments, 8COM 5V panels are available in charge pump mode; for lower display power consumption, 6COM 3V panels are recommended in resistor divider mode. The two schemes are hardware compatible and only require software configuration switching. - LCD module power consumption better than 5μA in resistor divider mode.Peripherals- High-speed GPIO with multi-voltage interface capability:  RN8318: 93 GPIO;  RN8615 / RN8613 / RN8612: 64 GPIO;  RN8611: 50 GPIO. - 10-bit ADC, time-division multiplexed for temperature sensing, battery voltage detection and general ADC channels. - LVD voltage detector for internal power supply and external voltage monitoring. - Two low-power comparators for external signal detection. - Two extended 32-bit timers. - 6 × UART with auto baud rate, infrared modulation, UART wake-up and signal inversion support. - 2 × ISO7816 interface. - 1 × I2C interface. - 1 × SPI interface. - Hardware watchdog. - 8 multiplexed key interrupt pins. - 8 multiplexed external interrupt pins. Hardware Encryption- Hardware true random number generator compliant with NIST FIPS 140-2. - Hardware AES128/192/256 encryption compliant with FIPS197, supporting ECB/CBC/CTR/GCM/GMAC modes. - ECC192 hardware accelerator integrated. - Encryption function not available on RN8612. - Refer to Renergy application notes for detailed encryption specifications.