Renesas DF38076RLP4V

Overview

DF38076RLP4V from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/300H Super Low Power Series, featuring an H8/300H CPU core with H8/300 instruction set compatibility, 52 KB on-chip ROM, and integrated peripherals including 16-bit timer pulse unit (TPU), SCI serial interfaces, and RTC. It operates at up to 20 MHz and supports multiple low-power modes (subactive, subsleep, standby) for battery-powered industrial control and sensor interface applications.

For engineers reviewing the DF38076RLP4V datasheet, DF38076RLP4V pinout, DF38076RLP4V application, or DF38076RLP4V equivalent, key selection criteria include its 80-pin TQFP package (12 × 12 mm, 0.5 mm pitch), flash memory version compatibility, subclock oscillator support (32.768 kHz/38.4 kHz), and interrupt controller with three mask levels for deterministic real-time response.

Technical Context

The DF38076RLP4V implements a Harvard-architecture H8/300H CPU with 24-bit address space, supporting both medium-speed (φM) and high-speed (φH) system clocks derived from external crystal or on-chip oscillator. Its clock system includes prescaler S for peripheral module timing and dedicated subclock generator for RTC operation.

Hardware interrupt handling uses a priority-based controller with five interrupt priority registers (IPRA–IPRE), enabling configurable mask levels (0–2) for 25 internal interrupts (flash version) and external IRQ/WKP pins. The on-chip debugging emulator reserves NMI, P16, P36, and P37 - limiting their use in debug-enabled designs.

Key Specifications

Pinout & Package

DF38076RLP4V is housed in a 80-pin Thin Quad Flat Package (TQFP) with 0.5 mm lead pitch and 12 mm × 12 mm body size (package code PTQP0080KC-A). Pin functions are defined per the H8/38076R Group Hardware Manual Rev.4.00, with dedicated pins for subclock input (X1/X2), reset (RES), and on-chip debugging (NMI, P16, P36, P37).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF38076RLP4V, R5F38076KFP#30 offers field-upgradable firmware at the cost of higher power in flash write cycles and added software complexity, while H8/38024R sacrifices RTC, TPU, and serial interface depth to reduce size and cost - making DF38076RLP4V the optimal balance for time-aware embedded control.

Availability

DF38076RLP4V is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering interfaces, and programmable logic controller I/O modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for DF38076RLP4V 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, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The H8/38076R Group belongs to Renesas' legacy H8 Family targeting ultra-low-power 16-bit control applications; it was designed specifically for cost-sensitive, battery-operated, and time-critical embedded systems requiring deterministic real-time performance and minimal external components.

FAQ

What is the maximum operating frequency of the DF38076RLP4V?

The DF38076RLP4V supports a maximum system clock frequency of 20 MHz in high-speed (φH) mode. This timing is achievable when using an external crystal oscillator or the on-chip oscillator configured for high-speed operation. The DF38076RLP4V's H8/300H CPU executes most instructions in 1–2 clock cycles, enabling deterministic real-time response for control applications. Electrical characteristics in the official Renesas Hardware Manual confirm stable operation up to 20 MHz across the full 2.7–5.5 V supply range.

Does the DF38076RLP4V include on-chip flash memory or ROM?

The DF38076RLP4V contains 52 KB of on-chip mask-programmed ROM, not flash memory. This ROM is programmed during wafer fabrication and cannot be reprogrammed in-system. It provides non-volatile, tamper-resistant program storage ideal for high-volume, fixed-function applications. For field-upgradable firmware, engineers should consider the flash-based variant R5F38076KFP#30 instead of the DF38076RLP4V.

Can the DF38076RLP4V operate from a 32.768 kHz crystal for real-time clock functionality?

Yes, the DF38076RLP4V supports 32.768 kHz crystal connection via X1 and X2 pins for its subclock generator, enabling accurate RTC operation in low-power modes. The hardware manual specifies Epson C-001R (32.768 kHz) as a qualified resonator with ≤35 kΩ equivalent series resistance. The subclock signal (φW) drives the RTC while the main system remains in subsleep or standby, achieving ≤1.5 µA typical current draw with timekeeping active.

Which pins are reserved for on-chip debugging on the DF38076RLP4V?

When using the on-chip debugging emulator (E7), the DF38076RLP4V reserves NMI, P16, P36, and P37. These pins cannot be used as general-purpose I/O during debug sessions. Specifically, NMI becomes a dedicated debug input, P16 and P36 function as inputs, and P37 acts as an output. To retain full GPIO functionality, debug must be disabled - requiring standalone operation or alternative debug methods such as external emulators.

What low-power modes does the DF38076RLP4V support, and how do they differ?

The DF38076RLP4V supports four operational modes: Active (medium/high-speed), Subactive, Subsleep, and Standby. Subactive retains CPU register state and RAM while stopping φH/φM clocks; Subsleep stops φH/φM and disables most peripherals but keeps subclock (φW) and RTC running; Standby halts all clocks except φW and maintains RTC and limited RAM retention. Current drops from ~5 mA (active) to ≤1.5 µA (standby), making DF38076RLP4V suitable for energy-harvesting and battery-critical designs.