company blog about Recycle Renesas RL78 Series MCU:RL78/G13A,RL78/G13,RL78/G1H

Recycle Renesas RL78 Series MCU:RL78/G13A,RL78/G13,RL78/G1H

Shenzhen Mingjiada Electronics Co., Ltd. has specialised in the electronic component recycling sector for many years and is a professional provider of inventory management and recycling services within the industry. We purchase genuine, original manufacturer products, obsolete stock, discontinued products and idle chips at highly competitive prices, helping businesses to rapidly reduce inventory, recover capital and minimise warehousing and management costs.

Key Advantages of Our Recycling Service

1. High-value recycling with industry-leading quotes

Based on global market trends and taking into account model, batch, packaging, quantity and condition (original packaging/mounted on boards/unmounted), we provide accurate quotations that are 10%–30% higher than those of our competitors.

There are no hidden fees; genuine, original products (including those in original packaging or on pallets) will receive priority processing and higher quotations, whilst obsolete stock, discontinued orders and dismantled components will all be fairly priced.

2. Comprehensive purchase of all product categories, with no entry barriers

No quantity restrictions: from a single sample to batches of hundreds or tens of thousands of items, we cater for all;

No condition restrictions: we purchase brand-new, original products, slow-moving stock, board-mounted or dismantled components, and tested components;

3. Secure, Efficient and Prompt Payment

Streamlined process: Simply provide part numbers, quantities, batch numbers and a condition list; we will issue a preliminary quote within 1 hour and complete an accurate valuation within 24 hours;

Flexible settlement: We accept cash, telegraphic transfers and bank transfers; payment is made immediately upon confirmation of receipt, with no credit terms or delays;

Confidential Transactions: Strict confidentiality of client information is maintained throughout the process; a non-disclosure agreement is signed to prevent the disclosure of inventory information and safeguard clients’ commercial privacy.

4. One-Stop End-to-End Service

From inventory categorisation → submission of the list → quotation → inspection → settlement → logistics, we provide full-process support to ensure you enjoy a hassle-free and efficient experience

I. Overview of the RL78 Series

Renesas RL78 is a family of 16-bit, low-power, CISC-architecture general-purpose MCUs. It employs a three-stage pipelined Harvard architecture, with a maximum clock speed of 32 MHz and a processing power of 43.2 DMIPS. The operating voltage ranges from 1.6 V to 5.5 V. It features a built-in high-precision on-chip oscillator, multiple low-power modes, hardware security monitoring, and a rich array of analogue and communications peripherals, and is primarily targeted at consumer electronics, portable medical devices, industrial sensing and battery-powered IoT devices.

The RL78/G13, G13A and G1H all belong to the G13 derivative product line; whilst their cores are identical, the key differences lie in memory capacity, power consumption specifications, pin configuration, the level of peripheral integration and target application positioning.

II. RL78/G13 Standard General-Purpose Flagship Models

1. Core Positioning

The RL78/G13 is the standard general-purpose entry-level model within the entire sub-series. It offers the broadest product coverage and the most comprehensive range of pin and memory configurations, striking a balance between cost, performance and expandability. It is the mainstream choice for small household appliances, industrial data acquisition and portable devices.

2. Key Hardware Specifications

Core and Clock: RL78 16-bit core, up to 32 MHz; built-in multi-range high-speed oscillator (1–32 MHz, accuracy ±1%) + 32.768 kHz low-speed sub-clock, supporting RTC calendar timing

Memory Grading (Full Coverage)

Programme Flash: 16 KB to 512 KB, covering the entire range

On-chip SRAM: 2KB to 32KB

Data Flash: 4KB / 8KB, 1 million erase/write cycles, supports background read/write (BGO) functionality

Pins and Packages: 24 to 128 pins, available in LQFP/LSSOP/QFN/VFBGA packages, with a wide range of I/O counts and support for multiple external expansion channels

Analogue peripherals: Up to 26 channels of 10-bit ADCs, built-in temperature sensor, internal reference voltage, multi-channel analogue comparators

Digital peripherals

Timers: 8 x 16-bit TAU timers, 8 x 8-bit timers, independent watchdog timer (WDT), 12-bit interval timer

Communications: Multiple UARTs, SPI/CSI, I²C and LIN buses; integrated 4-channel DMA data transfer controller

System: POR power-on reset, LVD low-voltage detection, RAM parity check, clock monitoring and illegal operation self-test; complies with the IEC 60730 household appliance safety standard

Power consumption characteristics

Operating current: 66 μA/MHz @ 32 MHz

STOP deep sleep (RTC running): 230 nA (typical)

Supports three tiered low-power modes: HALT, STOP and SNOOZE; sleep mode can be woken by peripherals

Temperature range: Commercial grade – 40 to +85 °C; Industrial grade – 40 to +105 °C

3. Typical Applications

Domestic air conditioners, washing machines, smart sockets, small kitchen appliances; portable medical devices such as electronic scales, blood glucose monitors and thermometers; battery-powered industrial sensors and temperature control instruments; access control systems, remote controls and small motor drives.

III. RL78/G13A Ultra-Low-Power, High-Capacity Enhanced Version

1. Core Positioning

The G13A is an optimised version of the G13 offering high capacity and low power consumption. It retains only high-end memory specifications, with the overall operating current further reduced compared to the G13. It is specifically designed for long-term battery-powered operation and applications requiring large programme capacity; there are no lower-specification models with smaller Flash capacities.

2. Differentiating Specifications (Compared to G13)

Fixed high-end memory range: Programme Flash available only in 384KB and 512KB variants; SRAM: 24KB or 32KB; Data Flash: standardised at 8KB, suitable for complex algorithms, multi-protocol applications and designs requiring large caches

Streamlined high-end pin count packaging: available only in 44–100-pin LQFP packages; low-cost 24/32-pin packages have been discontinued; maximum I/O channels: 92

Power consumption improvements: Active operating current reduced by approximately 15% compared to the G13, with further optimisation of sleep-mode leakage current, making it suitable for devices requiring no battery replacement for several years

Peripheral compatibility: Full reuse of the G13’s complete suite of analogue, timer, communication and security peripherals; 4-channel DMA, RTC and 20-channel 10-bit ADC remain unchanged

Power Supply and Temperature: Same 1.6–5.5 V wide voltage range; optional commercial or industrial temperature zones

3. Key Advantages

Large-capacity Flash + ultra-low-power dual buffers; no need for external EEPROM or Flash;

Lower sleep-mode quiescent current, extending the battery life of lithium-ion and dry-cell devices;

Hardware and software compatible with the high-capacity G13 models, allowing direct pin-to-pin replacement to upgrade power efficiency.

4. Typical Applications

Portable multi-parameter medical monitors, smart water/gas/heat meters, outdoor battery data acquisition terminals, high-end energy-storage smart home panels, and wireless sensor aggregation nodes.

IV. RL78/G1H: Streamlined, Cost-Effective Entry-Level Model

1. Core Positioning

The RL78/G1H is a low-cost, feature-streamlined derivative of the G13, with redundant peripherals removed, storage limits reduced and packaging simplified. It is primarily targeted at simple control applications, low-cost consumer electronics and sub-board coprocessor scenarios.

2. Differentiating Specifications (Compared to G13/G13A)

Reduced memory: Programme Flash capped at 64KB, SRAM up to 8KB, and Data Flash limited to 4KB, suitable for simple logic and single-protocol control programmes

Miniaturised pin count: Small packages ranging from 20 to 64 pins, primarily LSSOP and small QFN, occupying less PCB space and reducing material costs

Peripheral Streamlining

Number of ADC channels halved; some multiplexers removed;

Timer channels streamlined; multiple PWM outputs removed;

Multi-channel high-speed DMA removed; interrupt controller hierarchy simplified;

Basic UART, SPI and I²C retained; industrial-specific interfaces such as the LIN bus removed

Power consumption: Basic low-power modes are retained; operating current is slightly lower than that of the standard G13, but lacks the deep low-power optimisations found in the G13A

Simplified safety features: Basic protection such as POR and LVD is retained, whilst advanced self-test functions—including RAM parity checks and clock monitoring—have been removed; does not meet stringent industrial safety standards

3. Key Advantages

Significant price advantage, making it the preferred choice for cost reduction in small-batch consumer products;

Compact package, suitable for compact remote controls, small sensors and auxiliary control units;

Development tools are compatible with the G13, eliminating the need to change the compilation and debugging environment.

4. Typical Applications

Home appliance remote controls, small LED lighting controllers, simple motion-sensing switches, toy control boards, auxiliary detection sub-MCUs for small household appliances, and disposable portable detection devices.