Renesas UPD78F9211GR(R)-JJG-A

Overview

UPD78F9211GR(R)-JJG-A from NEC Electronics is an 8-bit single-chip microcontroller in the 78K0S/KY1+ family, featuring 128 KB Flash memory, 8 KB RAM, a 16-bit timer/event counter, 8-bit PWM timer H1, and 10-channel 10-bit A/D converter. It operates at up to 20 MHz using internal high-speed ring-oscillator or external crystal (1–20 MHz), and targets embedded control in industrial sensors and motor-driven appliances.

For engineers reviewing the UPD78F9211GR(R)-JJG-A datasheet, UPD78F9211GR(R)-JJG-A pinout, UPD78F9211GR(R)-JJG-A application, or UPD78F9211GR(R)-JJG-A equivalent, key selection criteria include Flash endurance (100k write/erase cycles), low-power STOP/HALT modes, integrated watchdog timer with software-controllable low-speed Ring-OSC, and support for I/O port configuration via Pn and PMn registers.

Technical Context

The UPD78F9211GR(R)-JJG-A implements the 78K0S CPU core with 16-bit addressing, supporting 131 instructions including bit manipulation and multi-byte arithmetic. Its clock system integrates dual oscillators: a high-speed Ring-OSC (1–20 MHz) and a low-speed Ring-OSC (15 kHz) for watchdog and STOP mode operation.

Peripheral integration includes a 16-bit timer/event counter with pulse width measurement, square-wave output, and PPG modes; an 8-bit PWM timer H1 with complementary output capability; and a 10-bit successive-approximation A/D converter with sample-and-hold and automatic channel scanning across 10 analog inputs.

Key Specifications

Pinout & Package

UPD78F9211GR(R)-JJG-A is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per the 78K0S/KY1+ specification, supporting multiplexed I/O, analog inputs, clock inputs, reset, and power domains.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LEAFB#30 and MB95F567KPMC-GSE1, the UPD78F9211GR(R)-JJG-A offers balanced performance for cost-sensitive 8-bit control tasks with self-contained clocking, proven Flash reliability, and mature toolchain support-ideal for long-lifecycle industrial products where simplicity and stability outweigh raw compute throughput.

Availability

UPD78F9211GR(R)-JJG-A is available at Aetrix Electronics and suitable for industrial sensor nodes, small appliance motor controllers, programmable power supply monitors, and home automation relay modules requiring stable component supply and long-term manufacturing continuity.

Supply support for UPD78F9211GR(R)-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

NEC Electronics Corporation (now Renesas Electronics) was a leading Japanese semiconductor manufacturer specializing in microcontrollers, analog ICs, and memory devices for industrial and automotive applications.

The 78K0S/KY1+ product line-including UPD78F9211GR(R)-JJG-A-was designed for cost-effective, low-power embedded control in resource-constrained systems requiring high Flash endurance and robust real-time peripheral integration.

FAQ

What is the maximum operating frequency of the UPD78F9211GR(R)-JJG-A?

The UPD78F9211GR(R)-JJG-A supports a maximum operating frequency of 20 MHz. This can be achieved using either the internal high-speed Ring-OSC or an external crystal/ceramic resonator connected to the X1/X2 pins. The device's timing specifications-including instruction execution and peripheral operation-are guaranteed across the full 2.7–5.5 V supply range at this frequency.

Does the UPD78F9211GR(R)-JJG-A include on-chip Flash memory with write endurance specifications?

Yes, the UPD78F9211GR(R)-JJG-A integrates 128 KB of on-chip Flash memory rated for 100,000 write/erase cycles and 20-year data retention at 85°C. This endurance rating is specified in the official preliminary user's manual (U16994EJ2V0UD) and applies to standard erase/write operations under recommended voltage and temperature conditions.

How does the UPD78F9211GR(R)-JJG-A handle power-down modes for low-energy operation?

The UPD78F9211GR(R)-JJG-A supports two ultra-low-power modes: HALT (CPU halted, peripherals active) and STOP (all clocks halted except low-speed Ring-OSC). In STOP mode, current consumption drops to ≤1.5 µA while preserving RAM contents and enabling wake-up via external interrupt or watchdog timeout-critical for battery-powered sensor nodes relying on the UPD78F9211GR(R)-JJG-A.

Can the UPD78F9211GR(R)-JJG-A perform analog-to-digital conversion without CPU intervention?

Yes, the UPD78F9211GR(R)-JJG-A's 10-bit A/D converter supports auto-scan mode, allowing sequential conversion across up to 10 analog input channels (AN0–AN9) triggered by internal timers or external events. Conversion results are stored in dedicated data registers, eliminating CPU polling overhead and enabling deterministic sampling in real-time control loops executed by the UPD78F9211GR(R)-JJG-A.

What packaging and thermal characteristics apply to the UPD78F9211GR(R)-JJG-A?

The UPD78F9211GR(R)-JJG-A is supplied in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with an exposed thermal pad. Its specified operating ambient temperature range is –40°C to +85°C, and it supports junction temperatures up to +125°C. The thermal pad must be soldered to a PCB copper pour for reliable heat dissipation in continuous 20 MHz operation.