Renesas R5F11BBEGNA#20

Overview

R5F11BBEGNA#20 from Renesas Electronics is a 32-pin HWQFN-packaged RL78/G1F 16-bit microcontroller with 64 KB flash, 5.5 KB RAM, and ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD). It integrates an 8/10-bit ADC (13 channels), dual 8-bit DACs, two comparators, one PGA, nine 16-bit timers, real-time clock, and multiple serial interfaces (CSI, UART/LIN, I²C, IrDA) for embedded control in industrial sensor nodes and battery-powered HMI systems.

For engineers reviewing the R5F11BBEGNA#20 datasheet, R5F11BBEGNA#20 pinout, R5F11BBEGNA#20 application, or R5F11BBEGNA#20 equivalent, key selection criteria include its 32-pin HWQFN (5 × 5 mm, 0.5 mm pitch) package, −40 to +105°C industrial temperature grade, 1.6–5.5 V supply range, and support for self-programming with boot swap and background data flash rewriting.

Technical Context

The R5F11BBEGNA#20 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction timing (0.03125 μs at 32 MHz to 30.5 μs at 32.768 kHz). Its power management includes HALT, STOP, and SNOOZE modes, plus on-chip POR and 14-level LVD with interrupt/reset selection.

Peripheral integration centers on event-driven operation: the Event Link Controller (ELC) supports 22 event sources linked to peripherals, while the Data Transfer Controller (DTC) enables chain transfers triggered by 32 interrupt sources-enabling deterministic low-CPU-overhead sensor data acquisition and actuator control without polling.

Key Specifications

Pinout & Package

Package: 32-pin HWQFN (5 × 5 mm, 0.5 mm pitch), exposed die pad (to be connected to VSS), REGC requires 0.47–1 μF capacitor to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F11BBCGNA#20, the R5F11BBEGNA#20 provides double flash capacity for secure bootloader + application partitioning; versus R5F11BLEGFB#30, it delivers identical core/peripheral functionality in a 44% smaller footprint and lower thermal mass-critical for space-constrained industrial enclosures.

Availability

R5F11BBEGNA#20 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, PLC I/O modules, and medical infusion pump controllers requiring stable component supply across extended product lifecycles.

Supply support for R5F11BBEGNA#20 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, and power solutions for industrial, automotive, and IoT markets.

The RL78/G1F product line targets ultra-low-power general-purpose embedded control, emphasizing energy efficiency, integrated analog, and flexible peripheral routing for cost-sensitive industrial and consumer applications.

FAQ

What is the maximum operating frequency of the R5F11BBEGNA#20?

The R5F11BBEGNA#20 supports a maximum CPU operation frequency of 32 MHz using the high-speed on-chip oscillator. At this speed, minimum instruction execution time is 0.03125 μs. The device also supports subsystem clock operation at 32.768 kHz for RTC and ultra-low-power modes, with instruction timing scaling accordingly.

Does the R5F11BBEGNA#20 support LIN bus communication?

Yes, the R5F11BBEGNA#20 supports LIN bus communication through its UART0 and UART2 peripherals, both of which include LINSEL functionality. This enables direct implementation of LIN 2.2-compliant slave nodes without external transceivers for basic diagnostic and control messaging in automotive and industrial networks.

How many analog input channels does the R5F11BBEGNA#20 have?

The R5F11BBEGNA#20 provides 13 analog input channels (ANI0–ANI7, ANI16–ANI20) for its 8/10-bit ADC. This count is confirmed for the 32-pin HWQFN variant per the RL78/G1F datasheet Section 1.6, and includes dedicated pins with internal reference voltage (1.45 V) and temperature sensor support.

What is the purpose of the REGC pin on the R5F11BBEGNA#20?

REGC is the regulator bypass capacitor terminal for the internal voltage regulator. It must be connected to VSS via a 0.47–1 μF ceramic capacitor to stabilize the internal regulated voltage. Failure to do so may cause erratic operation or failure to enter low-power modes. This requirement is explicitly specified in the R5F11BBEGNA#20 datasheet pin configuration diagrams and electrical specifications.

Can the R5F11BBEGNA#20 perform flash memory writes while executing code?

Yes, the R5F11BBEGNA#20 supports background operation (BGO) for data flash memory. Instructions can be executed from code flash memory while rewriting the 4 KB data flash area, enabling continuous real-time operation during firmware updates or data logging without CPU interruption or system stall.