Renesas R5F10KBCANA#20

Overview

R5F10KBCANA#20 from Renesas Electronics is a 32-pin, 16-bit RL78/G1C microcontroller with integrated USB function controller (no host capability), 32 KB flash, 2 KB data flash, 5.5 KB RAM, and ultra-low-power operation down to 0.57 µA in RTC+LVD halt mode. It operates from 2.4 V to 5.5 V, delivers 31 DMIPS at 24 MHz, and targets USB-powered consumer devices such as portable medical sensors and smart accessories requiring certified battery charging support.

For engineers reviewing the R5F10KBCANA#20 datasheet, R5F10KBCANA#20 pinout, R5F10KBCANA#20 application, or R5F10KBCANA#20 equivalent, key selection criteria include its USB function-only controller compliance with USB 2.0 full-speed (12 Mbps), Apple MFi 2.1A/1.0A charging modes, 9-channel 10-bit ADC, and HWQFN-32 (5 × 5 mm) package with exposed die pad for thermal management.

Technical Context

The R5F10KBCANA#20 implements the RL78 16-bit CISC Harvard architecture with 3-stage pipeline, enabling 86% of instructions in 1–2 clock cycles and 16×16 multiply in 1 cycle. Its USB subsystem supports only device-mode enumeration and full-speed transfers, with dedicated UDP0/UDM0 pins and UVDD/UVBUS power regulation - no host controller logic or dual-role capability is present.

Power management includes three low-power modes: Stop (0.23 µA RAM-retained), Halt (0.57 µA with RTC + LVD), and Snooze, all enabled by on-chip voltage regulator (REGC), POR/LVD with 9 threshold options, and 15 kHz watchdog timer with window function. The high-speed on-chip oscillator provides ±1% accuracy from 2.4 V to 5.5 V and −20°C to +85°C.

Key Specifications

Pinout & Package

32-pin plastic HWQFN (5 × 5 mm, 0.5 mm pitch) with exposed die pad recommended to be connected to VSS. Pin functions are defined per Renesas R01DS0348EJ0140 Rev.1.40 Figure 1-1(2).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB function controller applications.

Compared with R5F10JBCANA#20, the R5F10KBCANA#20 removes host-mode circuitry to reduce cost and power, making it optimal for pure device roles; versus STM32F072CBT6, it offers out-of-box MFi charging certification and lower active current (71 µA/MHz vs. ~100 µA/MHz), but trades ARM toolchain flexibility for RL78's ultra-low-power determinism.

Availability

R5F10KBCANA#20 is available at Aetrix Electronics and suitable for USB medical dongles, smart charging adapters, industrial configurators, and portable diagnostic tools requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for R5F10KBCANA#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, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G1C product line is designed for ultra-low-power USB-connected consumer and industrial peripherals, integrating USB function control, precision analog, and robust safety features (CRC, parity, illegal access detection) into compact QFN packages.

FAQ

What USB speed and device classes does the R5F10KBCANA#20 support?

The R5F10KBCANA#20 supports USB 2.0 full-speed (12 Mbps) and low-speed (1.5 Mbps) operation exclusively in function (device) mode. It implements standard USB device classes including CDC ACM (virtual COM port), HID, and MSC via firmware - no hardware host controller or OTG capability is present. Its USB interface complies with Battery Charging Specification 1.2 and Apple MFi 2.1A/1.0A charging modes, verified in Renesas R01DS0348EJ0140.

Does the R5F10KBCANA#20 include an internal voltage reference for the ADC?

Yes, the R5F10KBCANA#20 includes an internal 1.45 V voltage reference for the 10-bit ADC, selectable via software alongside AVREFP and VDD. This allows stable analog measurements independent of supply rail fluctuations - critical for battery-powered USB sensors. The ADC achieves 2.1 µs minimum conversion time and supports up to 9 input channels (ANI0–ANI7, ANI16–ANI19), as confirmed in Section 1.1 of the R01DS0348EJ0140 datasheet.

What is the lowest power consumption mode supported by the R5F10KBCANA#20?

The R5F10KBCANA#20 achieves 0.57 µA in Halt mode with RTC and LVD active, and 0.23 µA in Stop mode with RAM retention - both measured at VDD = 2.4 V to 5.5 V and TA = −40°C to +85°C. These values are specified in Section 1.1 "Ultra-Low Power Technology" of the R01DS0348EJ0140 datasheet. Snooze mode enables partial peripheral operation while CPU sleeps, further optimizing energy use in USB suspend/resume sequences.

Is the R5F10KBCANA#20 pin-compatible with other RL78/G1C variants like R5F10JBCANA#20?

No, the R5F10KBCANA#20 is not pin-compatible with R5F10JBCANA#20. While both use the same 32-pin HWQFN package, R5F10JBCANA#20 includes additional USB host pins (UDP1, UDM1, UOVRCUR0/1, UVBUSEN0/1) absent in R5F10KBCANA#20, which reserves those pads as NC or IC (internal connection). Pin mappings for USB, power, and I/O differ - see Figures 1-1(1) and 1-1(2) in R01DS0348EJ0140 for exact layouts.

What debug interface does the R5F10KBCANA#20 provide, and how is it implemented?

The R5F10KBCANA#20 provides a single-wire on-chip debug interface via the TOOL0 pin (P40), supporting programming and real-time debugging without JTAG/SWD overhead. This interface uses the RL78's built-in debug module and requires only one PCB trace plus standard Renesas E2 emulator or compatible tools. It is documented in Section 1.1 "1-wire on-chip debug function" and Figure 1-1(2) of R01DS0348EJ0140, and does not require external debug headers or additional pins.