Renesas UPD78F9512GR(R)-JJG-A

Overview

UPD78F9512GR(R)-JJG-A from Renesas Electronics is an 8-bit single-chip microcontroller based on the 78K0S CPU core, featuring 4 KB flash memory, 128 bytes of high-speed RAM, and operation across 2.2–5.5 V supply at −40 to +85°C. It integrates a 16-bit timer/event counter, 8-bit timer H1 with PWM output, watchdog timer, power-on clear, low-voltage detection, and 14 I/O pins (13 CMOS I/O + 1 CMOS input) - used in compact embedded control systems such as appliance motor drivers and sensor interface modules.

For engineers reviewing the UPD78F9512GR(R)-JJG-A datasheet, UPD78F9512GR(R)-JJG-A pinout, UPD78F9512GR(R)-JJG-A application, or UPD78F9512GR(R)-JJG-A equivalent, key selection considerations include its SSOP-16 package, absence of A/D converter, internal 8 MHz ±5% oscillator, 0.2 µs min instruction cycle at 10 MHz, and dedicated reset pin with dual-mode port functionality.

Technical Context

The UPD78F9512GR(R)-JJG-A implements the 78K0S CPU core with 64 KB address space, supporting direct, relative, register, and indirect addressing modes. Its clock system includes selectable sources: external crystal/ceramic (2–10 MHz), external clock input (2–10 MHz), or internal high-speed oscillator (8 MHz ±5% over −40 to +85°C).

It provides three independent timing resources: one 16-bit timer/event counter with capture/compare/PWM capabilities, one 8-bit timer H1 supporting PWM output, and one watchdog timer driven by a dedicated 240 kHz internal oscillator - all operating independently of the main system clock for robust fault monitoring.

Key Specifications

Pinout & Package

UPD78F9512GR(R)-JJG-A is housed in a 16-pin plastic SSOP (Shrink Small Outline Package) with 0.65 mm lead pitch and JEDEC MS-012AC footprint compatibility. The package supports reflow soldering per J-STD-020 and is lead-free (Sn/Bi plating).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F9512GR(R)-JJG-A, R5F100PLAFB#30 offers significantly more memory and integrated peripherals but requires toolchain migration, while UPD78F9212GR-JJG-A retains full hardware compatibility and adds ADC functionality at the cost of slightly higher unit price and same package constraints.

Availability

UPD78F9512GR(R)-JJG-A is available at Aetrix Electronics and suitable for home appliance motor control, industrial sensor interface modules, smart power outlet controllers, and LED lighting dimming modules requiring stable component supply and long-term production continuity.

Supply support for UPD78F9512GR(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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT applications.

The UPD78F9512GR(R)-JJG-A belongs to the 78K0S/KY1+ family, designed for cost-sensitive, space-constrained embedded control applications where reliability, low power, and minimal external components are critical.

FAQ

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

The UPD78F9512GR(R)-JJG-A supports a maximum system clock frequency of 10 MHz when using external crystal or clock input. Its internal high-speed oscillator operates at 8 MHz ±5% over −40 to +85°C, enabling 0.2 µs minimum instruction execution time under nominal conditions. The device does not support frequencies above 10 MHz, and exceeding this limit may cause timing violations or functional failure.

Does the UPD78F9512GR(R)-JJG-A include an analog-to-digital converter?

No, the UPD78F9512GR(R)-JJG-A does not include an A/D converter. It is part of the "F95xx" series, explicitly designated as A/D non-equipped variants within the 78K0S/KY1+ family. In contrast, the "F92xx" series (e.g., UPD78F9212GR-JJG-A) includes a 10-bit 4-channel ADC. This distinction is confirmed in Section 1.4 and Table 1.6 of the U16994JJ6V0UD user manual.

What package type and lead finish does the UPD78F9512GR(R)-JJG-A use?

The UPD78F9512GR(R)-JJG-A uses a 16-pin plastic SSOP (Shrink Small Outline Package) with part code GR-JJG. Its lead finish is lead-free Sn/Bi plating, indicated by the "-A" suffix in the orderable part number. This package complies with JEDEC MS-012AC mechanical dimensions and supports standard reflow soldering profiles per J-STD-020.

Can the RESET pin on the UPD78F9512GR(R)-JJG-A be used as a general-purpose input after reset?

Yes, the P34/RESET pin can be configured as a general-purpose CMOS input port after system initialization, provided the appropriate option byte setting is programmed. According to Section 2.2.2 and Chapter 15 of the user manual, this requires disabling the reset function via option byte configuration - but the pin remains input-only and must be externally pulled up when used in port mode.

What is the purpose of the TI000 and TI010 pins on the UPD78F9512GR(R)-JJG-A?

The TI000 (on P20) and TI010 (on P21) pins serve as external trigger inputs for the 16-bit timer/event counter 00. TI000 feeds both the counter clock and capture registers CR000/CR010, while TI010 triggers only CR000. These inputs enable precise event timing, pulse-width measurement, and external synchronization - critical for motor control, power line monitoring, and encoder interfacing in the UPD78F9512GR(R)-JJG-A's target applications.