Renesas DF2128FA16LG

Overview

DF2128FA16LG from Renesas Electronics is a 32-bit H8S/2000 CPU-based microcontroller with on-chip F-ZTAT™ flash memory, 16-bit free-running timer (FRT), four 8-bit timers (TMR), dual serial communication interfaces (SCI), eight-channel 10-bit A/D converter, and data transfer controller (DTC) - designed for PC monitor control and embedded system management requiring fast boot and field-programmable firmware.

For engineers reviewing the DF2128FA16LG datasheet, DF2128FA16LG pinout, DF2128FA16LG application, or DF2128FA16LG equivalent, this part supports I²C bus interface (optional), PWMX timer outputs, timer connection functionality, and single-supply 3.3 V operation - key selection criteria for display subsystems, industrial HMI controllers, and real-time sensor-actuator coordination.

Technical Context

The DF2128FA16LG implements the H8S/2000 CPU core with 16 general-purpose 16-bit registers (32-bit configurable), one-cycle basic instruction execution, and a 16-Mbyte linear address space. It integrates dual SCI modules supporting asynchronous and clock-synchronous modes, plus an optional I²C bus interface for peripheral configuration and status reporting.

Its on-chip DTC enables autonomous memory-to-peripheral and peripheral-to-memory transfers without CPU intervention, while the FRT, TMR, and PWMX modules support precise timing, pulse-width modulation for backlight or fan control, and inter-timer synchronization via timer connection - critical for coordinated display timing and power sequencing.

Key Specifications

Pinout & Package

DF2128FA16LG is housed in a 128-pin LQFP package (14 mm × 20 mm, 0.4 mm pitch) with exposed thermal pad, optimized for thermal dissipation in enclosed monitor chassis and compatibility with automated SMT assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21285SNFP and HD64F2128FV, DF2128FA16LG uniquely balances field-upgradability (via F-ZTAT™), compact 128-pin LQFP packaging, and full peripheral integration - making it optimal for mid-volume monitor designs needing post-deployment calibration and feature tuning.

Availability

DF2128FA16LG is available at Aetrix Electronics and suitable for PC monitor control, industrial HMI panels, smart power distribution, and automated test fixtures requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for DF2128FA16LG 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/2128 Series - including DF2128FA16LG - was engineered for display subsystem control and real-time embedded systems demanding integrated timing, programmable flash, and deterministic I/O response in compact form factors.

FAQ

What is the maximum operating frequency of the DF2128FA16LG?

The DF2128FA16LG operates at a maximum CPU frequency of 25 MHz when powered at 3.3 V, with internal clock divider options allowing flexible trade-offs between performance and power consumption. Its H8S/2000 core executes most instructions in a single cycle at this rate, delivering consistent real-time response for display timing and sensor polling tasks. The DF2128FA16LG datasheet specifies timing margins for all peripheral modules - including SCI, ADC, and PWM - at this frequency under worst-case voltage and temperature conditions.

Does DF2128FA16LG support in-circuit debugging?

Yes, DF2128FA16LG supports on-chip debugging via the H8S/2000-standard background debugger mode (BDM), accessible through dedicated BKIN/BKOUT pins. This allows full breakpoint, register inspection, and memory read/write capabilities without halting real-time peripheral operation - essential for validating timing-critical display control logic. The DF2128FA16LG requires no external debug probe beyond a standard Renesas E8/E8a emulator interface cable.

What is the endurance rating of the on-chip flash memory in DF2128FA16LG?

The F-ZTAT™ flash memory in DF2128FA16LG is rated for 10,000 write/erase cycles per sector and data retention of 20 years at 85°C. Each erase operation targets 64-byte blocks, and program operations occur in 2-byte increments - enabling fine-grained calibration data updates without wearing out adjacent sectors. The DF2128FA16LG includes built-in flash protection registers to prevent accidental overwrite of bootloader or critical configuration regions.

Can DF2128FA16LG operate from a 5 V supply?

No, DF2128FA16LG is specified exclusively for 3.3 V ±0.3 V operation and is not 5 V tolerant on any I/O pin. Applying 5 V to VCC or I/O pins will damage the device. External level shifters are required for interfacing with legacy 5 V peripherals such as certain RS-232 transceivers or older EEPROMs. The DF2128FA16LG's absolute maximum ratings explicitly prohibit voltages exceeding 4.0 V on any pin, including reset and interrupt inputs.

Is the I²C interface on DF2128FA16LG enabled by default?

No, the I²C interface on DF2128FA16LG is an optional module that must be enabled via the System Control Register (SYSCR) bit IOSE and configured through the I²C Control Register (ICCR). It is disabled at reset to minimize power consumption and avoid bus contention. The DF2128FA16LG requires explicit software initialization - including clock prescaler setup and slave address definition - before I²C communication can begin.