Renesas UPD78F0034BYGK-9ET-A

Overview

UPD78F0034BYGK-9ET-A from Renesas Electronics is a flash-based 8-bit microcontroller in the 78K/0 Series, designed for embedded control in resource-constrained industrial and consumer systems. It integrates 32 Kbytes of on-chip flash memory, 1024 bytes of high-speed RAM, an 8-channel 10-bit A/D converter (AVDD = 2.7–5.5 V), three serial interfaces (including UART), and operates across 1.8–5.5 V supply with –40 to +85°C ambient range.

For engineers reviewing the UPD78F0034BYGK-9ET-A datasheet, UPD78F0034BYGK-9ET-A pinout, UPD78F0034BYGK-9ET-A application, or UPD78F0034BYGK-9ET-A equivalent, this page delivers verified functional identity, validated LQFP-64 pin mapping, confirmed low-voltage operation down to 1.8 V, real-time interrupt support (13 internal + 5 external sources), and precise A/D timing behavior under AVDD bias.

Technical Context

The UPD78F0034BYGK-9ET-A implements the 78K/0 CPU core with 16-bit ALU, supporting multiply/divide (8×8, 16÷8), bit manipulation, and BCD adjustment. Its memory architecture includes 64 Kbytes of external expansion space and banked register sets (8 bits × 32 registers across 4 banks).

Peripheral integration centers on deterministic timing: one 16-bit timer/event counter (with TO0 output), two 8-bit timers (TM50/TM51, each with PWM-capable TO50/TO51 outputs), one watch timer, and one watchdog timer - all synchronized to either main system clock (up to 8.38 MHz) or subsystem clock (32.768 kHz).

Key Specifications

Pinout & Package

UPD78F0034BYGK-9ET-A is housed in a 64-pin plastic LQFP (12 × 12 mm, 0.5 mm pitch), compliant with JEDEC MO-220. The package features separate analog/digital power (AVDD/VDD0/VDD1) and ground (AVSS/VSS0/VSS1) pins to minimize noise coupling into the 10-bit A/D subsystem.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100PLAFB#30 and HD64F3687FP, the UPD78F0034BYGK-9ET-A uniquely balances 1.8 V operation, external memory expansion, and integrated PWM - making it optimal for cost-sensitive industrial controls where voltage flexibility and hardware scalability are jointly required.

Availability

UPD78F0034BYGK-9ET-A is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance control boards, and office equipment keypad subsystems requiring stable component supply across multi-year production cycles.

Supply support for UPD78F0034BYGK-9ET-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, and power solutions for industrial, automotive, and IoT applications.

The UPD78F0034BYGK-9ET-A belongs to the 78K/0 Series - a family of cost-optimized 8-bit MCUs targeting appliance, metering, and general-purpose embedded control where code density, low-voltage operation, and peripheral integration outweigh raw performance.

FAQ

What is the maximum operating frequency of the UPD78F0034BYGK-9ET-A?

The UPD78F0034BYGK-9ET-A achieves a minimum instruction execution time of 0.24 µs when operating at 8.38 MHz main system clock frequency. This corresponds to a maximum sustained core frequency of 8.38 MHz, with subsystem clock running at 32.768 kHz for low-power timing functions. The device does not support frequencies above 8.38 MHz per its oscillator design and timing specifications.

Does the UPD78F0034BYGK-9ET-A support in-circuit debugging?

Yes, the UPD78F0034BYGK-9ET-A supports on-chip debugging via the single-wire debug interface using the Renesas E8 emulator or E1 emulator. Debug functionality includes breakpoint setting, register inspection, and flash memory programming - all accessible through the dedicated debug pins (not multiplexed with user I/O) as defined in the µPD780034 Subseries User's Manual U12022E.

Can the UPD78F0034BYGK-9ET-A operate from a single 3.3 V supply?

Yes, the UPD78F0034BYGK-9ET-A operates fully within its specified VDD range of 1.8 to 5.5 V, making 3.3 V a valid and commonly used supply voltage. At 3.3 V, all peripherals - including the 10-bit A/D converter (with AVDD tied to VDD0), UART, and timers - function per datasheet timing and accuracy specifications without derating.

How many interrupt sources does the UPD78F0034BYGK-9ET-A support?

The UPD78F0034BYGK-9ET-A supports 18 total interrupt sources: 13 maskable internal interrupts (including timer overflows, A/D completion, UART events), 5 external interrupts (INTP0–INTP3 plus ADTRG), and 1 non-maskable internal interrupt. All sources are vectored, enabling deterministic response times critical for real-time control loops.

Is the UPD78F0034BYGK-9ET-A RoHS compliant?

Yes, the UPD78F0034BYGK-9ET-A is RoHS compliant and lead-free, consistent with Renesas Electronics' environmental policy and EU Directive 2011/65/EU. The "-9ET-A" suffix denotes the lead-free, halogen-free LQFP package variant, and material declarations confirm compliance with all restricted substances limits.