Renesas UPD78F0822BGF(A)-GAS-AX

Overview

UPD78F0822BGF(A)-GAS-AX from Renesas Electronics is an 8-bit CISC microcontroller in the 78K0 CAN subseries, featuring a 16 MHz max clock, 120 Kbytes single-voltage Flash, 5 Kbytes RAM, DCAN interface, and integrated 4-channel stepper motor drivers. It operates from 4.0–5.5 V at −40 to +85°C and is packaged in a 100-pin QFP (14 × 20 mm, 0.65 mm pitch), targeting automotive instrument cluster control.

For engineers reviewing the UPD78F0822BGF(A)-GAS-AX datasheet, UPD78F0822BGF(A)-GAS-AX pinout, UPD78F0822BGF(A)-GAS-AX application, or UPD78F0822BGF(A)-GAS-AX equivalent, key selection considerations include CAN bus timing compliance, on-chip stepper driver current capability (±100 mA per channel), LCD controller resolution (34 × 4 segments), real-time clock support via 37.768 kHz crystal, and secure self-programming Flash architecture.

Technical Context

This microcontroller implements the 78K0 CPU core with instruction set compatibility across the 78K/0 series and supports both external 16 MHz crystal and internal 240 kHz ring oscillator for flexible clock sourcing. Its DCAN module complies with ISO 11898-1:2003 and supports bit rates up to 1 Mbps with programmable sample points and three transmission modes (normal, loopback, silent).

The peripheral set includes four 16-bit timers (with input capture, output compare, PWM generation), two 8-bit timers, eight 10-bit ADC channels with selectable reference voltage, LIN-UART for serial communication, and dual CSI interfaces configurable as 3-wire or 2/3-wire synchronous serial ports - all mapped to 76 general-purpose I/O pins with programmable pull-up/pull-down and interrupt capability.

Key Specifications

Pinout & Package

Package: 100-pin QFP (14 mm × 20 mm, 0.65 mm pin pitch), thermally enhanced for sustained operation in automotive cabin environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0822BGF(A)-GAS-AX, R5F100LEAFB#30 offers superior energy efficiency and modern toolchain support but requires external motor drivers, while MC9S12XEP100MAL delivers greater processing headroom and dual-CAN robustness at the cost of larger footprint and absence of display/motion peripherals.

Availability

UPD78F0822BGF(A)-GAS-AX is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial CAN panels, vehicle diagnostic tools, and smart HVAC control units requiring stable component supply and long-term lifecycle assurance.

Supply support for UPD78F0822BGF(A)-GAS-AX 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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.

The UPD78F0822BGF(A)-GAS-AX belongs to the 78K0 CAN subseries, designed specifically for cost-sensitive automotive body electronics where integration of motor control, display, and CAN communication reduces system-level complexity.

FAQ

What is the maximum operating frequency of the UPD78F0822BGF(A)-GAS-AX?

The UPD78F0822BGF(A)-GAS-AX supports a maximum main clock frequency of 16 MHz using an external crystal connected to XT1/XT2 pins. It also includes an internal 240 kHz ring oscillator used for low-power modes and real-time clock backup. The 78K0 CPU core executes instructions at this clock rate with fixed-cycle timing for deterministic behavior in automotive timing-critical tasks.

Does the UPD78F0822BGF(A)-GAS-AX include on-chip Flash memory, and is it self-programmable?

Yes, the UPD78F0822BGF(A)-GAS-AX integrates 120 Kbytes of single-voltage Flash memory with secure self-programming capability. This allows firmware updates in-system via LIN or CAN interfaces under bootloader control, with lock-bit protection preventing unauthorized access. The Flash endurance is rated for 100,000 write/erase cycles and data retention of 20 years at 85°C.

How many stepper motor drivers are integrated into the UPD78F0822BGF(A)-GAS-AX, and what is their drive capability?

The UPD78F0822BGF(A)-GAS-AX includes four integrated H-bridge stepper motor drivers (STP0–STP3), each capable of delivering ±100 mA output current per phase. These drivers support full-step, half-step, and microstepping control via software-configured PWM and direction signals, eliminating the need for external driver ICs in instrument cluster gauge applications.

What type of LCD interface does the UPD78F0822BGF(A)-GAS-AX support, and how many segments can it drive?

The UPD78F0822BGF(A)-GAS-AX features a built-in 34 × 4 segment LCD controller supporting static and multiplexed (1/2, 1/3, 1/4 duty) drive modes. It provides dedicated SEG0–SEG33 and COM0–COM3 outputs with internal bias generation, enabling direct connection to common automotive segmented displays without external resistors or charge pumps.

Is the UPD78F0822BGF(A)-GAS-AX qualified for automotive applications, and what temperature range does it support?

Yes, the UPD78F0822BGF(A)-GAS-AX is qualified for automotive body electronics applications with an operating temperature range of −40°C to +85°C and meets AEC-Q100 stress test requirements for Grade 3 components. Its design targets dashboard-mounted systems where thermal cycling and vibration resistance are critical, and it carries Renesas' "Standard" quality grade per internal classification.