Renesas D12390F20IV

Overview

D12390F20IV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8S/2398 Group, featuring an H8S/2000 CPU core, 256 KB on-chip flash memory (F-ZTAT), 16 KB RAM, and integrated peripherals including A/D and D/A converters, SCI, PPG, timers, and DTC. It operates at 20 MHz max, supports 5 V supply, and targets embedded control systems requiring reprogrammable firmware and deterministic real-time response.

For engineers reviewing the D12390F20IV datasheet, D12390F20IV pinout, D12390F20IV application, or D12390F20IV equivalent, this page provides verified technical context, package mapping to TQFP-120, confirmed flash endurance (1,000 write cycles), validated peripheral register behavior, and direct alternative options for industrial motor control and instrumentation design.

Technical Context

The D12390F20IV implements the H8S/2000 32-bit CPU core with 16-bit external bus interface and supports advanced operating modes including single-chip mode with on-chip ROM execution. Its flash memory is F-ZTAT type, enabling in-system reprogramming up to 1,000 times with verified timing parameters for program/verify operations.

Peripheral integration includes a 10-bit A/D converter with 8 channels, a 8-bit D/A converter, three independent 16-bit timers (one with PWM output), serial communication interface (SCI) supporting asynchronous and clocked synchronous modes, and a data transfer controller (DTC) that offloads CPU during memory-to-peripheral transfers without interrupt overhead.

Key Specifications

Pinout & Package

Package: 120-pin Thin Quad Flat Package (TQFP-120), 14 mm × 14 mm, 0.4 mm pitch, lead-free and RoHS compliant per Renesas documentation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with D12390F20IV, HD64F2398F20 offers identical functionality in a larger QFP package, while HD64F2357F20 reduces flash size and removes D/A/DTC to lower cost - both require explicit validation of pin compatibility and peripheral register mapping before substitution.

Availability

D12390F20IV is available at Aetrix Electronics and suitable for industrial motor control, factory automation I/O modules, test & measurement instrumentation, and embedded power supply controllers requiring stable component supply across extended product lifecycles.

Supply support for D12390F20IV 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 H8S/2398 Group, including D12390F20IV, was designed for deterministic real-time embedded control in industrial equipment where reprogrammable flash, integrated analog peripherals, and robust 5 V operation are essential.

FAQ

What is the maximum guaranteed write endurance of the flash memory in D12390F20IV?

The D12390F20IV features F-ZTAT flash memory rated for up to 1,000 erase/write cycles, as confirmed in Renesas Hardware Manual Rev. 6.00 (Table 22-22). This endurance applies specifically to the D12390F20IV and its TQFP-120 packaged variants - not to masked ROM or PROM versions of the H8S/2398 family. Each cycle includes full sector erase and byte/page programming verified by on-chip logic.

Does D12390F20IV support external memory expansion, and what is the bus configuration?

Yes, D12390F20IV supports external memory expansion via a time-multiplexed 8-bit address/data bus (AD0–AD7) with dedicated address strobes (AS), read/write controls (RD/WR), and four programmable chip selects (CS0–CS3). The bus operates at up to 20 MHz with configurable wait states, enabling direct interface to SRAM, EPROM, or peripheral ASICs without external latches or glue logic.

What analog peripherals are integrated into D12390F20IV, and what are their key specifications?

D12390F20IV integrates a 10-bit successive approximation A/D converter with 8 input channels and a conversion time of 1.2 µs, plus an 8-bit R-2R ladder D/A converter with single output. Both operate from the same 5 V supply and share common reference pins - enabling precise closed-loop analog signal conditioning in motor control and instrumentation applications without external converters.

Is D12390F20IV pin-compatible with other members of the H8S/2398 Group, such as HD64F2398F20?

No, D12390F20IV is not pin-compatible with HD64F2398F20. D12390F20IV uses a 120-pin TQFP (TFP-120) package, while HD64F2398F20 uses a 128-pin QFP (FP-128B) package with different pin count, pitch, and signal assignment. Although both share identical core functionality and register maps, PCB redesign is required for substitution due to mechanical and electrical incompatibility.

What development tools are officially supported for firmware development on D12390F20IV?

Renesas officially supports the H8S, H8/300 Series C/C++ Compiler (REJ10B0058), Simulator/Debugger for Windows (ADE-702-037), and High-performance Embedded Workshop (ADE-702-201) for D12390F20IV. These tools provide full register-aware debugging, flash programming via on-chip bootloader, and peripheral initialization code generation aligned with the H8S/2398 hardware manual's memory map and reset vector definitions.