Renesas R5F11Y68ASM#10

Overview

R5F11Y68ASM#10 from Renesas Electronics is an RL78/G1N-series 20-pin TSSOP microcontroller with 8 KB flash memory, 1 KB RAM, and ultra-low-power operation (0.61 µA in STOP mode). It integrates an 8/10-bit 8-channel ADC, UART/CSI serial interfaces, four 16-bit timers, watchdog and interval timers, and supports key interrupt and buzzer output functions - deployed in battery-powered consumer appliances requiring compact, low-cost control.

For engineers reviewing the R5F11Y68ASM#10 datasheet, R5F11Y68ASM#10 pinout, R5F11Y68ASM#10 application, or R5F11Y68ASM#10 equivalent, key selection criteria include its 8 KB flash capacity, 20-pin TSSOP package with N-ch/P-ch open-drain I/O, ±2% high-speed on-chip oscillator accuracy, and support for real-time output and programmable clock/buzzer generation in consumer-grade temperature range (−40°C to +85°C).

Technical Context

The R5F11Y68ASM#10 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling minimum instruction execution time of 0.05 µs at 20 MHz. Its peripheral set includes a dedicated 12-bit interval timer, watchdog timer operable with low-speed 15 kHz on-chip oscillator, and UART/CSI channels sharing SCK00/SI00/SO00 pins via register-controlled multiplexing.

It features selectable power-on-reset (SPOR) with four rising-edge detection thresholds (2.25 V to 4.45 V), on-chip debug support, and BCD correction circuitry. The device uses dual on-chip oscillators: high-speed (1.25–20 MHz, ±2% accuracy over −20°C to +85°C) and low-speed (15 kHz ±15%), with clock switching managed by system control registers.

Key Specifications

Pinout & Package

Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65 mm pitch), RoHS-compliant, tray packaging (#10 suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F11Y67ASM#10, the R5F11Y68ASM#10 provides double flash/RAM for feature-rich firmware; versus R5F11W68ASM#10, it adds P-ch open-drain I/O and RTIO for direct display/buzzer interfacing - making it optimal for integrated HMI subsystems in consumer electronics.

Availability

R5F11Y68ASM#10 is available at Aetrix Electronics and suitable for smart home thermostats, portable medical devices, wireless remotes, and LED lighting dimmers requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F11Y68ASM#10 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.

The RL78/G1N product line targets cost-sensitive, ultra-low-power consumer applications - emphasizing integrated peripherals (key interrupt, buzzer output, segment LCD drive), small footprint, and simplified bill-of-materials for mass-market electronics.

FAQ

What is the maximum operating frequency of the R5F11Y68ASM#10 high-speed on-chip oscillator?

The R5F11Y68ASM#10 high-speed on-chip oscillator supports up to 20 MHz operation with ±2.0% accuracy across −20°C to +85°C ambient temperature. Frequency selection (1.25/2.5/5/10/20 MHz) is configured via option byte bits 0–2. This eliminates external crystal requirements while maintaining timing integrity for UART and timer-based functions in the R5F11Y68ASM#10.

Does the R5F11Y68ASM#10 support hardware debugging during development?

Yes, the R5F11Y68ASM#10 includes an on-chip debug function compatible with Renesas E2 emulator and CS+ IDE. Debug access uses the TOOL0 pin and internal circuitry - enabling full breakpoint, step-through, and memory inspection capabilities without external debug headers. However, Renesas advises against using this function in mass-produced units due to flash rewrite endurance limits affecting R5F11Y68ASM#10 reliability.

How many analog input channels does the R5F11Y68ASM#10 ADC support, and what is its resolution?

The R5F11Y68ASM#10 integrates an 8/10-bit resolution successive-approximation A/D converter with eight analog input channels (ANI0–ANI7), operating over VDD = 2.4–5.5 V. Resolution is software-selectable per conversion; 10-bit mode delivers 1 LSB = VDD/1024, supporting precision sensor measurements such as thermistor or battery voltage monitoring in the R5F11Y68ASM#10.

What power-saving modes are available on the R5F11Y68ASM#10, and what are their typical current draws?

The R5F11Y68ASM#10 offers HALT mode (390–980 µA) and STOP mode (0.61 µA typical at VDD = 3 V, TA = 25°C). In STOP mode, the CPU, flash, and most peripherals halt while retaining RAM content and allowing wake-up via RESET, INTP0–INTP5, or key interrupt. This ultra-low quiescent current makes the R5F11Y68ASM#10 ideal for intermittent-sensing applications like remote controls and environmental monitors.

Can the R5F11Y68ASM#10 drive a common-anode LCD display directly?

No - the R5F11Y68ASM#10 does not support direct common-anode LCD driving. It lacks built-in LCD voltage booster and segment commons control logic. However, its six P-ch open-drain outputs (P00–P05) can source up to 120 mA each (at VDD = 4.5–5.5 V) to drive LED segments or discrete LCD backplane drivers. For integrated LCD control, Renesas recommends RL78/L12 or RL78/F14 families instead of the R5F11Y68ASM#10.