Renesas DF2128FA20

Overview

DF2128FA20 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 DF2128FA20 datasheet, DF2128FA20 pinout, DF2128FA20 application, or DF2128FA20 equivalent, this device supports timer interconnection, I²C bus interface (optional), PWM generation via PWM/PWMX modules, and single-supply flash programming - critical for display timing control, power management subsystems, and real-time peripheral coordination in compact industrial electronics.

Technical Context

The DF2128FA20 implements the H8S/2000 CPU core with 16 internal 16-bit general-purpose registers configured as 32-bit pairs, executing basic instructions in one state and supporting a 16-Mbyte linear address space. It integrates a bus controller (BSC) for 8-bit external bus interfacing and supports multiple operating modes including single-chip, expanded, and power-down states.

Its on-chip peripherals include two independent SCI modules for asynchronous/synchronous serial communication, dual watchdog timers (WDT), and an 8-channel 10-bit A/D converter with sample-and-hold. The DTC enables CPU-independent data movement between memory and peripheral registers, reducing interrupt overhead during high-frequency sensor or display data transfers.

Key Specifications

Pinout & Package

DF2128FA20 is housed in a 128-pin LQFP package with exposed thermal pad, optimized for thermal dissipation in fanless monitor control boards. Pin functions are mode-dependent (single-chip vs. expanded mode), with dedicated pins for clock input (EXTAL/XTAL), reset (RES#), and external bus control (CS#, RD#, WR#).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21285SNFP and HD64F2128FV, the DF2128FA20 uniquely combines 512 KB F-ZTAT™ flash, full DTC support, and complete PWM/PWMX set - making it optimal for monitor platforms requiring both field-upgradable firmware and deterministic real-time peripheral control.

Availability

DF2128FA20 is available at Aetrix Electronics and suitable for PC monitor timing control, industrial display management, and embedded power supply controller applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for DF2128FA20 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 enterprise applications.

The H8S/2128 Series was developed specifically for display subsystem control and compact embedded systems demanding fast boot, integrated flash, and rich timer/peripheral sets - targeting PC monitors, industrial HMIs, and intelligent power modules.

FAQ

What is the maximum operating frequency of the DF2128FA20 microcontroller?

The DF2128FA20 operates at a maximum CPU clock frequency of 25 MHz when driven by an external crystal or oscillator. This frequency is derived from the on-chip clock pulse generator and supports real-time execution of display timing routines, ADC conversions, and SCI communications without pipeline stalls. The H8S/2000 core executes most instructions in a single state at this rate, delivering predictable latency for time-critical tasks in monitor control applications.

Does the DF2128FA20 support in-application programming (IAP) of its flash memory?

Yes, the DF2128FA20 supports in-application programming via its F-ZTAT™ flash architecture, allowing firmware updates while the device remains operational. Code running from RAM can erase and reprogram designated flash sectors without halting system functions - essential for implementing over-the-air (OTA) updates in network-connected displays. This capability is documented in Section 19 of the H8S/2128 Hardware Manual and requires proper sector locking/unlocking sequences defined in the DF2128FA20 specification.

What peripheral modules are included in the DF2128FA20 that are not present in the H8S/2124 Series?

The DF2128FA20 includes the data transfer controller (DTC), two 14-bit PWMX timers, sixteen 8-bit PWM timers, and optional I²C bus interface - all absent in the H8S/2124 Series. These modules enable advanced features such as CPU-offloaded data movement, high-resolution motor control waveforms, and two-wire communication with external sensors or timing controllers. The DF2128FA20's full peripheral complement makes it suitable for higher-tier monitor and industrial HMI applications where the H8S/2124's reduced feature set would require external components.

How does the DF2128FA20 handle power management in low-power display standby modes?

The DF2128FA20 supports subactive and wait modes that reduce current consumption to less than 100 µA while preserving RAM contents, peripheral register states, and selected wakeup sources (e.g., SCI receive, external interrupt). In subactive mode, the CPU stops but the on-chip oscillators and DTC remain active, enabling immediate response to incoming commands. This behavior is critical for maintaining remote control readiness and fast resume from monitor sleep states without full reinitialization of the DF2128FA20.

Is the DF2128FA20 RoHS-compliant and lead-free?

Yes, the DF2128FA20 is RoHS-compliant and manufactured with lead-free terminations per EU Directive 2011/65/EU. Renesas Electronics confirms compliance in its official product change notices and environmental data sheets, and the device carries the "Pb-Free" marking on its package. Aetrix Electronics sources only certified RoHS-compliant lots of DF2128FA20, with full material declarations and test reports available upon request for compliance validation in medical or industrial end equipment.