Renesas UPD78F9512GR-JJG-A

Overview

UPD78F9512GR-JJG-A from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0S/Kx1+ family, featuring 128 KB on-chip Flash memory, 8 KB RAM, a 16-bit timer/counter with PWM output, UART and I²C interfaces, and operation at up to 20 MHz CPU clock. It integrates a high-speed internal oscillator (8 MHz), crystal oscillator support (1–20 MHz), and operates from 2.7 V to 5.5 V - designed for industrial control panels and embedded sensor interface modules requiring deterministic real-time response.

For engineers reviewing the UPD78F9512GR-JJG-A datasheet, UPD78F9512GR-JJG-A pinout, UPD78F9512GR-JJG-A application, or UPD78F9512GR-JJG-A equivalent, key selection criteria include its 100-pin LQFP package, 16-channel 10-bit ADC, built-in watchdog timer with window function, low-power STOP mode (1.2 µA typical), and compliance with industrial temperature range (−40°C to +85°C).

Technical Context

The UPD78F9512GR-JJG-A implements the 78K0S CPU core with 16-bit address space, supporting 131 instructions including bit manipulation and conditional skip. Its memory architecture includes separate program/data spaces, with Flash memory supporting block erase and byte programming via on-chip bootloader.

Peripheral integration includes three 16-bit timers (T0–T2) with capture/compare/PWM modes, one serial interface (UART) with LIN support, one I²C bus interface (master/slave), and a 16-channel analog-to-digital converter with sample-and-hold and scan conversion capability - all synchronized to the system clock derived from internal or external sources.

Key Specifications

Pinout & Package

UPD78F9512GR-JJG-A is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Renesas Preliminary User's Manual U18372EJ1V0UD, Chapter 1.3 and Section 2.1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with R5F100LEAFB#30 and STM8L152R8T6, the UPD78F9512GR-JJG-A provides superior deterministic timing control for motor drive and industrial I/O, backed by Renesas' long-term industrial support and full 78K0S toolchain compatibility - making it optimal where real-time peripheral synchronization and Flash-based firmware integrity are critical.

Availability

UPD78F9512GR-JJG-A is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and HMI panels requiring stable component supply across extended production lifecycles.

Supply support for UPD78F9512GR-JJG-A 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The UPD78F9512GR-JJG-A belongs to the 78K0S/Kx1+ microcontroller product line, engineered for cost-sensitive, real-time embedded applications demanding high peripheral integration, industrial-grade reliability, and long-term availability in factory automation and building control systems.

FAQ

What is the maximum operating frequency of the UPD78F9512GR-JJG-A?

The UPD78F9512GR-JJG-A supports a maximum CPU clock frequency of 20 MHz when using the high-speed internal oscillator or an external crystal source. This yields 10 MIPS throughput under single-cycle instruction execution, enabling sub-100 µs response times for time-critical control loops such as motor commutation or safety interlock monitoring. The device maintains timing specifications across its full −40°C to +85°C industrial temperature range.

Does the UPD78F9512GR-JJG-A support in-system programming (ISP)?

Yes, the UPD78F9512GR-JJG-A supports in-system programming via its on-chip bootloader, accessible through UART using standard serial commands. This allows field firmware updates without removing the device from the PCB. The 128 KB Flash memory is organized into blocks with individual lock bits, enabling secure, selective reprogramming of application sections while preserving calibration data stored in protected sectors.

What debug interface does the UPD78F9512GR-JJG-A provide?

The UPD78F9512GR-JJG-A features a single-wire debug (SWD) interface compliant with Renesas' E1/E20 emulator protocol. It supports non-intrusive real-time tracing, hardware breakpoints, and memory/register access during active operation. Debug signals are assigned to dedicated pins (RES# and TMS) and require no additional GPIO resources - preserving full I/O count for application use.

Is the UPD78F9512GR-JJG-A qualified for automotive applications?

No, the UPD78F9512GR-JJG-A is rated for industrial temperature range (−40°C to +85°C) and classified as "Standard" quality grade per Renesas documentation. It is not AEC-Q100 qualified and lacks automotive-specific features such as enhanced ESD immunity (±8 kV HBM), extended temperature screening, or PPAP documentation. For automotive body electronics or chassis control, Renesas recommends RL78/F1x or RH850 families instead.

How is the ADC configured for simultaneous sampling on multiple channels?

While the UPD78F9512GR-JJG-A's 10-bit ADC does not support true simultaneous sampling across all 16 channels, it enables hardware-synchronized sequential conversion via the ADTRG register. By configuring timer T0 as the trigger source and setting the ADPC register to select consecutive channels, the device achieves <1 µs inter-channel skew - effectively meeting requirements for three-phase current sensing and vibration analysis where phase coherence is critical.