Renesas UPD78F1835AGBA-GAH-E2-G

Overview

UPD78F1835AGBA-GAH-E2-G from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/FE3 family, featuring 256 KB Flash memory, 16 KB RAM, and a maximum CPU clock of 20 MHz. It integrates 12-bit ADC (16 channels), 8-bit D/A converter, 32-bit timer, watchdog timer, and UART/SPI/I²C interfaces. Designed for industrial control and motor drive applications requiring deterministic real-time response.

For engineers reviewing the UPD78F1835AGBA-GAH-E2-G datasheet, UPD78F1835AGBA-GAH-E2-G pinout, UPD78F1835AGBA-GAH-E2-G application, or UPD78F1835AGBA-GAH-E2-G equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), operating voltage range (2.7–5.5 V), -40°C to +85°C industrial temperature grade, and support for on-chip debug via FINE interface.

Technical Context

The UPD78F1835AGBA-GAH-E2-G implements the 78K0R CPU core with 16-bit architecture, Harvard memory organization, and instruction set compatible with earlier 78K0 devices. It supports dual-bank Flash for safe firmware updates and includes a dedicated hardware multiplier for efficient math operations.

Peripheral integration includes a 12-bit ADC with programmable sampling time and conversion trigger sources (timer, external pin, software), plus a 32-bit real-time counter with calendar function. The device uses a single 3.3 V or 5 V supply and features low-power modes (HALT, STOP) with wake-up via multiple interrupt sources.

Key Specifications

Pinout & Package

UPD78F1835AGBA-GAH-E2-G is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Renesas User's Manual Rev.6.00 (Section 2.1.5 for 78K0R/FE3). All pins support CMOS-level I/O with configurable pull-up/pull-down and Schmitt-trigger inputs on selected ports.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F100LEAFB#30, UPD78F1835AGBA-GAH-E2-G offers higher Flash density and integrated D/A for analog actuation, while UPD78F1834AGBA-GAH-E2-G provides identical peripheral functionality in a cost-optimized variant - both require no PCB changes due to shared 100-pin LQFP footprint and pin-compatible I/O mapping.

Availability

UPD78F1835AGBA-GAH-E2-G is available at Aetrix Electronics and suitable for industrial motor control, factory automation PLC modules, smart power metering, and building energy management systems requiring stable component supply and long-term lifecycle support.

Supply support for UPD78F1835AGBA-GAH-E2-G 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The UPD78F1835AGBA-GAH-E2-G belongs to the 78K0R/FE3 product line, designed specifically for deterministic real-time control in resource-constrained industrial equipment - emphasizing robustness, peripheral integration, and toolchain maturity over raw performance.

FAQ

What is the maximum operating frequency of the UPD78F1835AGBA-GAH-E2-G?

The UPD78F1835AGBA-GAH-E2-G operates at a maximum CPU clock frequency of 20 MHz when powered at 3.3 V, and up to 16 MHz at 2.7 V. This frequency is derived from the on-chip oscillator or external crystal input, with programmable PLL options enabling precise clock domain partitioning for ADC sampling and communication peripherals. The UPD78F1835AGBA-GAH-E2-G maintains timing compliance across its full industrial temperature range (-40°C to +85°C).

Does the UPD78F1835AGBA-GAH-E2-G support in-system programming (ISP)?

Yes, the UPD78F1835AGBA-GAH-E2-G supports in-system programming via its on-chip FINE debug interface using standard Renesas PG-FP5 or E2 emulator tools. Firmware updates can be performed without removing the device from the PCB, and dual-bank Flash architecture allows background reprogramming while executing code from the active bank - critical for maintaining uptime in industrial control systems. The UPD78F1835AGBA-GAH-E2-G does not require high-voltage programming signals.

What are the power supply requirements for the UPD78F1835AGBA-GAH-E2-G?

The UPD78F1835AGBA-GAH-E2-G requires two primary supply domains: VDD/EVDD0 (digital core and I/O) and EVDD1 (analog circuitry including ADC and D/A), all rated for 2.7 V to 5.5 V operation. Separate ground returns (VSS/EVSS0/EVSS1) must be used and joined at a single point on the PCB to minimize noise coupling. Decoupling capacitors (0.1 μF ceramic + 10 μF tantalum) are required per supply pair, placed within 5 mm of the respective pins. The UPD78F1835AGBA-GAH-E2-G draws 12 mA typical at 20 MHz/3.3 V in active mode.

Is the UPD78F1835AGBA-GAH-E2-G pin-compatible with other 78K0R/FE3 devices?

Yes, the UPD78F1835AGBA-GAH-E2-G shares identical 100-pin LQFP mechanical dimensions and pinout with other 78K0R/FE3 members including UPD78F1834AGBA-GAH-E2-G and UPD78F1831AGBA-GAH-E2-G. All devices use the same port mapping, peripheral assignment, and power/ground pin locations. This enables hardware reuse across firmware variants - for example, UPD78F1834AGBA-GAH-E2-G can serve as a drop-in replacement when Flash requirements decrease, preserving layout and test fixtures. The UPD78F1835AGBA-GAH-E2-G maintains full functional compatibility within this package group.

What development tools are supported for the UPD78F1835AGBA-GAH-E2-G?

Renesas provides full toolchain support for the UPD78F1835AGBA-GAH-E2-G, including the CC78K0R C compiler, RA78K0R assembler, PM+ IDE, and ID78K0R-QB debugger. Hardware tools include QB-MINI2 (on-chip debug emulator) and QB-78K0RFX3 (in-circuit emulator). Renesas also supplies the 78K0R Self Programming Library Type02 for secure firmware updates. All documentation - including the UPD78F1835AGBA-GAH-E2-G User's Manual (R01UH0007EJ0600) - is publicly available on the Renesas website.