Renesas UPD78F8052GB(R)-GAH-AX

Overview

UPD78F8052GB(R)-GAH-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/Lx3-M family, featuring 64 KB on-chip Flash memory, 4 KB RAM, and a 16-bit timer/counter with PWM output capability. It operates at up to 20 MHz, supports 5 V operation, and integrates ADC (10-bit, 32-channel), UART, I²C, and LCD controller for embedded control applications in industrial sensors and appliance motor control.

For engineers reviewing the UPD78F8052GB(R)-GAH-AX datasheet, UPD78F8052GB(R)-GAH-AX pinout, UPD78F8052GB(R)-GAH-AX application, or UPD78F8052GB(R)-GAH-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), operating temperature range (−40°C to +85°C), and support for on-chip self-programming via dedicated ROM library.

Technical Context

The UPD78F8052GB(R)-GAH-AX implements the 78K0 CPU core with 16-bit ALU and 24-bit addressing space, enabling access to full 64 KB Flash and 4 KB RAM without banking. Its peripheral set includes three 16-bit timers (T0–T2), one 8-bit timer (T3), and a watchdog timer with independent clock source.

It features dual voltage domains: AVDD/AVSS for analog peripherals (ADC, comparator) and VDD/VSS for digital logic, with separate AVREF and AVREFIO pins supporting external reference configuration. The integrated LCD controller drives up to 160 segments with static, 1/2, 1/3, or 1/4 duty and 1/2 or 1/3 bias.

Key Specifications

Pinout & Package

UPD78F8052GB(R)-GAH-AX is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined across 15 I/O ports (P1–P15), two low-power ports (LP0, LP1), analog inputs (ANI00–ANI31), segment/common outputs (SEGxx, COM0–COM3), and dedicated system pins including RESET, EXCLKS, FLMD0, and RTC1HZ.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LEAFB#30, UPD78F8052GB(R)-GAH-AX provides higher Flash density and integrated LCD drive but consumes more standby current; compared with UPD78F8054GB(R)-GAH-AX, it omits CAN yet maintains identical footprint and software compatibility for non-networked applications.

Availability

UPD78F8052GB(R)-GAH-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance control systems, and smart meter interface modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for UPD78F8052GB(R)-GAH-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 manufacturer headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and consumer markets.

The UPD78F8052GB(R)-GAH-AX belongs to the 78K0/Lx3-M product line, designed specifically for cost-effective, high-integration embedded control in resource-constrained applications requiring analog sensing, human interface (LCD), and deterministic real-time response.

FAQ

What is the maximum operating frequency of the UPD78F8052GB(R)-GAH-AX?

The UPD78F8052GB(R)-GAH-AX supports a maximum system clock frequency of 20 MHz. This can be achieved using either the internal high-speed oscillator (with optional trimming) or an external crystal/resonator connected to XT1/XT2 pins. At 20 MHz, instruction execution time is 200 ns per basic instruction cycle, enabling deterministic real-time control in motor and sensor applications.

Does the UPD78F8052GB(R)-GAH-AX support in-system programming (ISP)?

Yes, the UPD78F8052GB(R)-GAH-AX supports in-system programming via its on-chip self-programming library (Type01). This allows firmware updates in the final application without removing the device, using standard I/O pins and a minimal host-side bootloader. The library resides in ROM and requires no additional Flash space, preserving all 64 KB for user code.

What LCD configurations does the UPD78F8052GB(R)-GAH-AX support?

The UPD78F8052GB(R)-GAH-AX LCD controller supports static, 1/2-duty, 1/3-duty, and 1/4-duty drive methods with 1/2-bias or 1/3-bias configurations. It drives up to 160 segments using four common outputs (COM0–COM3) and up to 80 segment outputs (SEG00–SEG79), enabling direct interface to alphanumeric or custom segment displays without external drivers.

Is the UPD78F8052GB(R)-GAH-AX qualified for automotive applications?

No, the UPD78F8052GB(R)-GAH-AX is rated as a Renesas Standard-grade device, intended for industrial, office, and consumer equipment-not automotive or safety-critical systems. Its qualification covers −40°C to +85°C operation and meets RoHS requirements, but it lacks AEC-Q100 certification and does not support extended temperature ranges or automotive-specific fault diagnostics required for vehicle ECUs.

How many analog input channels does the ADC in the UPD78F8052GB(R)-GAH-AX support?

The UPD78F8052GB(R)-GAH-AX integrates a 10-bit successive approximation ADC with 32 selectable analog input channels (ANI00–ANI31). These include dedicated pins and shared I/O port pins configurable as analog inputs. Channel selection, conversion trigger source, and sample-and-hold timing are fully programmable via dedicated SFRs.