Renesas DF2138AVTF10V

Overview

DF2138AVTF10V from Renesas Electronics is a 16-bit single-chip microcomputer in the H8S/2138 Group, featuring a 32-bit H8S/2000 CPU core, 128 KB on-chip flash memory (F-ZTAT™), 8-channel 10-bit ADC, and dual 14-bit PWM timers (PWMX). It operates at up to 25 MHz with 5 V supply and supports keyboard scan, SCI, I²C (optional), and DTC for autonomous data transfer - deployed in notebook PC keyboard controllers and intelligent power supply systems.

For engineers reviewing the DF2138AVTF10V datasheet, DF2138AVTF10V pinout, DF2138AVTF10V application, or DF2138AVTF10V equivalent, key selection considerations include its 80-pin TFP-80C package, NMOS push-pull outputs on P52/P97, dual watchdog timers, 2× DAC channels, and support for subclock operation down to 32.768 kHz.

Technical Context

The DF2138AVTF10V implements the H8S/2000 CPU core with sixteen 16-bit general-purpose registers and a 16-Mbyte linear address space. It integrates an on-chip data transfer controller (DTC) enabling DMA-like transfers without CPU intervention, and supports timer connection for cascaded timing operations across multiple 8-bit TMR channels.

Its peripheral set includes three SCI modules (UART/IrDA), two 14-bit PWMX timers with programmable dead-time insertion, an 8-channel 10-bit ADC with sample-and-hold, and dual 8-bit D/A converters. Flash memory is organized into 128 KB with boot and programming control areas, supporting up to 10,000 erase/write cycles and 10-year data retention.

Key Specifications

Pinout & Package

DF2138AVTF10V is housed in an 80-pin TFP-80C package (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are mode-dependent (Single-Chip Mode 1–3, Flash Programmer Mode), with dedicated pins for SCI, PWMX, ADC, I²C (optional), and host interface (HIF).

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F2138AV, DF2138AVTF10V offers field-upgradable firmware and faster prototyping; compared with R5F52108ADFP, it delivers drop-in compatibility for legacy H8S-based designs and integrated keyboard/HIF functionality absent in RX210.

Availability

DF2138AVTF10V is available at Aetrix Electronics and suitable for notebook keyboard controllers, intelligent power supply units, PC monitor timing systems, and industrial display backlight drivers requiring stable component supply and long-lifecycle support.

Supply support for DF2138AVTF10V 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 automotive, industrial, and consumer applications.

The H8S/2138 Group was designed specifically for cost-sensitive, high-integration embedded peripherals - emphasizing fast interrupt response, on-chip flash flexibility, and comprehensive PC-interface peripherals like HIF and keyboard scan.

FAQ

What is the maximum operating frequency of the DF2138AVTF10V?

The DF2138AVTF10V operates at a maximum CPU clock frequency of 25 MHz when supplied with 4.5 V to 5.5 V. This frequency is achieved using the internal high-speed oscillator or an external crystal source. The H8S/2000 core executes most instructions in a single clock cycle, delivering predictable real-time performance critical for keyboard scan and PWM timing tasks in the DF2138AVTF10V.

Does the DF2138AVTF10V support I²C communication natively?

The DF2138AVTF10V supports I²C functionality only as an optional module - it is not integrated into all variants. When enabled, the I²C bus interface (IIC) appears on pins P52/SCL0 and P97/SDA0, both configured as NMOS open-drain outputs requiring external pull-ups. The DF2138AVTF10V's IIC module supports standard-mode (100 kbps) and fast-mode (400 kbps) operation, and is accessible via dedicated control registers in the STCR register group.

How many analog input channels does the DF2138AVTF10V ADC support?

The DF2138AVTF10V integrates an 8-channel 10-bit successive-approximation ADC with internal sample-and-hold circuitry. All eight analog inputs (AN0–AN7) are multiplexed onto dedicated pins and support simultaneous sampling in burst mode. The ADC operates independently of CPU execution, allowing background conversion while the DF2138AVTF10V handles keyboard scan or SCI communication.

What is the purpose of the DTC (Data Transfer Controller) in the DF2138AVTF10V?

The DTC in the DF2138AVTF10V is a hardware DMA engine that autonomously transfers data between peripherals and memory without CPU involvement. It supports up to 256-byte transfers triggered by ADC completion, SCI receive events, or timer overflow. By offloading repetitive data movement, the DTC reduces CPU interrupt load by up to 70%, improves real-time determinism, and extends low-power mode duration - a key capability distinguishing the DF2138AVTF10V from lower-tier H8S variants.

Is the DF2138AVTF10V pin-compatible with other H8S/2138 family members?

Yes, the DF2138AVTF10V is fully pin-compatible with other 80-pin TFP-80C variants in the H8S/2138 Group, including HD64F2138AV and HD6432138SW. All share identical pin numbering, electrical characteristics, and functional pin assignments in Single-Chip Mode 1. However, flash configuration bits, reset vector locations, and optional module enable settings (e.g., IIC, HIF) differ - requiring firmware validation even when hardware layout is reused across DF2138AVTF10V and compatible parts.