Renesas UPD78F0148HGK-9EU-A

Overview

UPD78F0148HGK-9EU-A from Renesas Electronics is an 8-bit Flash-based microcontroller in the 78K0/KF1+ family, featuring 128 KB on-chip Flash memory, 8 KB RAM, a 16-bit timer array unit (TAU), 10-bit ADC with 16 channels, and UART/SIO/I²C serial interfaces. It operates at up to 20 MHz, supports single 5 V supply, and targets embedded control in industrial sensors and motor-driven appliances.

For engineers reviewing the UPD78F0148HGK-9EU-A datasheet, UPD78F0148HGK-9EU-A pinout, UPD78F0148HGK-9EU-A application, or UPD78F0148HGK-9EU-A equivalent, key selection criteria include Flash self-programming capability, on-chip debug support (via HD variant), 2.1 V power-on reset threshold, and compatibility with RA78K0 assembler and CC78K0 C compiler toolchains.

Technical Context

The UPD78F0148HGK-9EU-A implements the 78K0 CPU core with 16-bit ALU, 32 × 8-bit general-purpose registers, and instruction cycle time as low as 0.125 μs at 16 MHz. It integrates a 10-bit successive-approximation ADC with sample-and-hold and programmable conversion start triggers.

Its peripheral set includes a 16-bit timer array unit supporting PWM output, input capture, and interval timing; three serial interface modules (UART, SIO, I²C); and a watchdog timer with independent clock source. The device uses SuperFlash® technology licensed from Silicon Storage Technology for reliable Flash endurance.

Key Specifications

Pinout & Package

UPD78F0148HGK-9EU-A 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 port group (P0–P7, P12–P14), each supporting configurable I/O, alternate peripheral functions, and internal pull-up capability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0148HGK-9EU-A, R5F100LEAFB#30 offers lower active power but less Flash and no standard on-chip debug; UPD78F0537GC-UEU-AX provides double Flash and higher ADC resolution at increased cost and package size - making UPD78F0148HGK-9EU-A optimal for mid-complexity 5 V industrial controls balancing code density, analog integration, and debug readiness.

Availability

UPD78F0148HGK-9EU-A is available at Aetrix Electronics and suitable for industrial sensor nodes, brushless DC motor controllers, and home appliance control boards requiring stable component supply and long-term production continuity.

Supply support for UPD78F0148HGK-9EU-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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions for industrial and automotive markets.

The UPD78F0148HGK-9EU-A belongs to the 78K0/KF1+ microcontroller product line, designed specifically for cost-sensitive, high-reliability 5 V embedded control applications in factory automation, consumer white goods, and building equipment.

FAQ

What is the maximum operating frequency of the UPD78F0148HGK-9EU-A?

The UPD78F0148HGK-9EU-A supports a maximum system clock frequency of 20 MHz. At 16 MHz operation, its minimum instruction execution time is 0.125 μs. This timing is achieved using the on-chip high-speed oscillator or an external crystal connected to X1/X2 pins. The device's electrical specifications guarantee stable operation across the full temperature range (−40°C to +85°C) at this frequency when powered within the 4.0–5.5 V supply range. UPD78F0148HGK-9EU-A does not require external clock dividers or PLLs to reach rated performance.

Does the UPD78F0148HGK-9EU-A support in-circuit debugging without additional hardware?

Yes, the UPD78F0148HGK-9EU-A supports on-chip debugging via the dedicated debug interface compatible with QB-78K0MINI emulator. No external debug header or SWD/JTAG adapter is required - debug signals share pins with standard I/O (e.g., P10–P13), and the interface activates automatically during reset when debug mode is enabled. This capability is confirmed in the 78K0/KF1+ User's Manual (U16819EJ3V0UD) and applies directly to the UPD78F0148HGK-9EU-A variant. UPD78F0148HGK-9EU-A retains full debug functionality even with all 128 KB Flash programmed.

What is the ADC reference configuration flexibility for the UPD78F0148HGK-9EU-A?

The UPD78F0148HGK-9EU-A ADC supports two reference configurations: internal (VDD-connected) or external (via AVREF pin). When AVREF is left unconnected, the ADC uses VDD as reference; when a stable external voltage (2.5–5.5 V) is applied to AVREF, it becomes the precise reference source. This dual-mode operation enables both ratiometric measurements (e.g., resistive sensor bridges) and absolute voltage readings. The AVSS pin must be tied to system ground, and decoupling capacitors near AVREF/AVSS are recommended per the UPD78F0148HGK-9EU-A hardware design guidelines.

Is the UPD78F0148HGK-9EU-A qualified for automotive applications?

No, the UPD78F0148HGK-9EU-A is classified as a "Standard" quality grade device per Renesas documentation, intended for computers, office equipment, industrial robots, and home appliances - not automotive or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature range (−40°C to +125°C), or automotive-specific failure-in-time (FIT) data. For automotive use, Renesas recommends RL78/F1x or RH850 families. UPD78F0148HGK-9EU-A remains suitable for non-safety industrial control where ambient temperature stays within −40°C to +85°C.

How does the UPD78F0148HGK-9EU-A handle power-on reset and brown-out conditions?

The UPD78F0148HGK-9EU-A features a fixed 2.1 V ±0.1 V power-on reset (POR) circuit that asserts reset until VDD rises above threshold and stabilizes. It does not include a user-configurable brown-out reset (BOR) circuit - recovery from transient dips below 2.1 V requires external supervision or software-based voltage monitoring via ADC. The RESET pin remains active low during POR and can be extended externally. This POR behavior is documented in the 78K0/KF1+ User's Manual and applies identically to UPD78F0148HGK-9EU-A across all operating conditions.