Renesas R5F12017ASP#50

Overview

R5F12017ASP#50 from Renesas Electronics is a 10-pin LSSOP, 4 KB code flash, 1 KB RAM RL78/G15 16-bit microcontroller with RL78 CPU core, operating at 2.4–5.5 V supply and supporting −40°C to +85°C (A-grade) ambient temperature. It integrates an 8/10-bit 4-channel A/D converter, 8-channel 16-bit timer array, UART, simplified SPI (CSI), and simplified I²C interfaces - optimized for compact industrial sensor nodes and low-power control modules.

For engineers reviewing the R5F12017ASP#50 datasheet, R5F12017ASP#50 pinout, R5F12017ASP#50 application, or R5F12017ASP#50 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative parts - all grounded in Renesas' official R01DS0420EJ0140 Rev.1.40 documentation.

Technical Context

The R5F12017ASP#50 implements the RL78-S2 CPU core with CISC architecture and 3-stage pipeline, delivering minimum instruction execution time of 0.0625 μs at 16 MHz using the high-speed on-chip oscillator. Its memory subsystem includes 4 KB code flash (1 KB block size), 1 KB data flash (512 B block, 1M rewrite cycles), and 1 KB on-chip RAM.

Peripherals are tightly integrated: one UART channel, two simplified SPI (CSI) channels, two simplified I²C channels, one full I²C bus interface, 4 analog inputs (ANI0–ANI3), one comparator (IVCMP0), and programmable clock/buzzer output (PCLBUZ0). Power management includes HALT and STOP modes, selectable power-on-reset (SPOR), and dual oscillators (15 kHz low-speed + 1–16 MHz high-speed on-chip).

Key Specifications

Pinout & Package

Package: 10-pin plastic LSSOP (4.4 × 3.6 mm, 0.65-mm pitch), embossed tape packaging (#50).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F12017ASP#50, R5F12018ASP#50 offers double flash capacity in identical packaging for seamless firmware scaling, while R5F12047ASP#50 trades pin count for enhanced analog and timing precision - making it ideal for next-generation sensor fusion or clock-critical control loops.

Availability

R5F12017ASP#50 is available at Aetrix Electronics and suitable for smart sensor nodes, industrial control panels, home appliance subsystems, and energy monitoring modules requiring stable component supply, long-term lifecycle assurance, and A-grade industrial temperature compliance.

Supply support for R5F12017ASP#50 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G15 group targets cost-sensitive, ultra-low-power embedded applications - delivering true low-power performance (54 µA/MHz) with rich analog integration and robust development tools for rapid time-to-market.

FAQ

What is the maximum operating frequency of the R5F12017ASP#50?

The R5F12017ASP#50 supports a maximum high-speed on-chip oscillator frequency of 16 MHz, yielding a minimum instruction execution time of 0.0625 μs. It also accepts external crystal inputs up to 12 MHz via X1/X2 pins (not present on 10-pin variant) or external clock up to 16 MHz via EXCLK. The actual achievable frequency depends on VDD and ambient temperature per Renesas' R01DS0420EJ0140 Rev.1.40 specifications.

Does the R5F12017ASP#50 support crystal oscillator connections?

No - the R5F12017ASP#50 in 10-pin LSSOP package does not include X1 or X2 pins. Crystal oscillator support is only available on 16-pin and 20-pin RL78/G15 variants (e.g., R5F12047ASP#50, R5F12067ASP#50). This part relies exclusively on its high-speed on-chip oscillator (1–16 MHz) or external clock input via EXCLK (available on larger packages, not on R5F12017ASP#50).

How many analog input channels does the R5F12017ASP#50 have?

The R5F12017ASP#50 provides four analog input channels: ANI0, ANI1, ANI2, and ANI3 - mapped to pins P01, P02, P03, and P04 respectively. These support 8/10-bit resolution A/D conversion with internal reference (0.815 V TYP.) or external reference voltage, and operate across the full 2.4–5.5 V VDD range per R01DS0420EJ0140 Rev.1.40.

Can the R5F12017ASP#50 perform simultaneous read/write to code and data flash?

No - the R5F12017ASP#50 does not support background operation (BGO). While rewriting data flash memory, instruction execution from code flash is disabled. Code flash writes require prior full-block erase (1 KB), and data flash rewrites occur in 32-bit units with guaranteed 1,000,000 cycles (TYP.). This constraint is explicitly documented in Section 1.1 of R01DS0420EJ0140 Rev.1.40.

What debug interface does the R5F12017ASP#50 use?

The R5F12017ASP#50 uses Renesas' on-chip debug interface accessible via TOOL0 (P40), TOOLRxD (P01), and TOOLTxD (P00) pins - compatible with E2 emulator and E2 studio IDE. It supports full breakpoint, watchpoint, and memory inspection capabilities without requiring JTAG or SWD headers. Debug functionality is enabled by default and requires no external components beyond standard 0 Ω pull-up/pull-down resistors per Renesas hardware design guidelines.