Renesas R5F1076CGSP#V0

Overview

R5F1076CGSP#V0 from Renesas is an RL78/L1A 16-bit microcontroller with integrated LCD controller/driver (45 segment × 8 common), 12-bit A/D and D/A converters (14/2 channels), rail-to-rail operational amplifiers (3 channels, 2 with analog MUX), and real-time clock 2 (RTC2) with calendar and alarm. It operates from 1.8 V to 3.6 V, delivers 33 DMIPS at 24 MHz, and targets ultra-low-power LCD-based consumer devices such as smart meters and portable health monitors.

For engineers reviewing the R5F1076CGSP#V0 datasheet, R5F1076CGSP#V0 pinout, R5F1076CGSP#V0 application, or R5F1076CGSP#V0 equivalent, key selection criteria include its 100-pin LFQFP package, 128 KB flash + 8 KB data flash + 5.5 KB RAM memory configuration, true low-power HALT mode (0.68 μA), and integrated analog front-end for sensor signal conditioning and LCD drive without external components.

Technical Context

The R5F1076CGSP#V0 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and selectable instruction execution time (0.04167 μs at 24 MHz to 30.5 μs at 32.768 kHz). Its system clock supports high-speed on-chip oscillator (1–24 MHz, ±1.0% accuracy), crystal (1–20 MHz), and subsystem clock (32.768 kHz).

Analog subsystem includes a 12-bit A/D converter with internal 1.45 V reference and temperature sensor, dual 12-bit D/A outputs (0.35 V to AVDD – 0.47 V), programmable voltage reference (1.5/1.8/2.048/2.5 V), and comparator with window mode - all operating within the same 1.8–3.6 V supply range as the digital core.

Key Specifications

Pinout & Package

Package: 100-pin plastic LFQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F1076CGSP#V0, R5F11MPGAFB#30 offers identical MCU functionality but reduced analog integration for LCD drive, while RA2A1GBM20FB#AC0 trades integrated LCD/analog peripherals for higher compute performance and modern Arm toolchain support - neither matches the exact analog-LCD co-integration of R5F1076CGSP#V0.

Availability

R5F1076CGSP#V0 is available at Aetrix Electronics and suitable for smart energy metering, portable medical devices, home appliance control panels, and industrial panel meters requiring stable component supply and long-term lifecycle support.

Supply support for R5F1076CGSP#V0 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/L1A product line is engineered specifically for ultra-low-power LCD-based consumer and industrial applications, integrating comprehensive analog peripherals and display control to minimize external component count and system power.

FAQ

What is the maximum operating frequency and associated DMIPS rating for R5F1076CGSP#V0?

The R5F1076CGSP#V0 achieves a maximum operating frequency of 24 MHz using its high-speed on-chip oscillator, delivering 33 DMIPS of processing performance. This rating is measured under standard conditions (VDD = 2.7–3.6 V, TA = -40°C to +85°C) and reflects the RL78 CPU core's efficiency with its 3-stage pipeline and optimized instruction set. The R5F1076CGSP#V0 maintains full peripheral functionality at this speed.

Does R5F1076CGSP#V0 support hardware-accelerated LCD refresh without CPU intervention?

Yes, the R5F1076CGSP#V0 includes a dedicated LCD controller/driver that supports automatic segment/common waveform generation and frame rate control via internal timers. The LCD module operates autonomously once configured, freeing the CPU for other tasks. This capability is confirmed in the RL78/L1A datasheet section 1.1 "Features" and block diagram (page 7), where the LCD controller is shown as a self-contained peripheral with RAM space for display data.

What are the supported LCD drive methods and how do they affect system design for R5F1076CGSP#V0?

The R5F1076CGSP#V0 supports three LCD drive methods: internal voltage boosting, capacitor split, and external resistance division. Internal boosting uses on-chip charge pumps (VL1–VL4, CAPH/CAPL pins) for high-contrast displays without external components; capacitor split requires external capacitors but lowers EMI; external resistor division uses simple resistors for lowest-cost implementations. Selection impacts BOM, layout, and contrast - all methods are configurable in firmware via LCD control registers.

Can R5F1076CGSP#V0 perform simultaneous analog acquisition and data flash logging?

Yes, the R5F1076CGSP#V0 supports Background Operation (BGO) for data flash, allowing the CPU to execute code from main flash memory while rewriting data flash. Combined with the 12-bit A/D converter's hardware trigger (ADTRG pin) and Event Link Controller (ELC), it can initiate A/D conversion upon timer event and store results to data flash without CPU polling - enabling deterministic real-time data acquisition and non-volatile logging.

What is the function of the REGC pin on R5F1076CGSP#V0 and what happens if it is left unconnected?

REGC is the regulator capacitance pin for the internal analog voltage regulator. It must be connected to VSS via a 0.47–1 μF capacitor to stabilize the LDO supplying the analog circuitry (A/D, D/A, op-amps, LCD driver). If left unconnected, the analog subsystem becomes unstable - causing A/D conversion errors, D/A output drift, LCD flicker, and potential op-amp saturation. This requirement is explicitly stated in the datasheet caution on page 4 and absolute maximum ratings on page 12.