Renesas DF2145BVFA10V

Overview

DF2145BVFA10V from Renesas Electronics is a 16-bit H8S/2145B microcontroller featuring 256 KB on-chip flash ROM, 8 KB RAM, an H8S/2000 CPU core, and integrated peripherals including 10-bit ADC, 8-bit DAC, SCI, I²C, PWM timers (8-bit and 14-bit), FRT, WDT, DTC, and X-bus/LPC host interfaces - deployed in industrial control and embedded instrumentation systems.

For engineers reviewing the DF2145BVFA10V datasheet, DF2145BVFA10V pinout, DF2145BVFA10V application, or DF2145BVFA10V equivalent, key selection criteria include its 256 KB flash capacity, 8 KB RAM, 5-V operation, QFP-144 package, and support for DRAM expansion via high-functionality bus controller - critical for deterministic real-time control with external memory mapping.

Technical Context

The DF2145BVFA10V implements the H8S/2000 CPU core with a 32-bit internal architecture, sixteen 16-bit general-purpose registers, and a 16-Mbyte linear address space. It supports three operating modes (single-chip, expanded, and minimum) and includes a data transfer controller (DTC) capable of autonomous bus-master DMA transfers without CPU intervention.

Its peripheral set includes dual PWM modules (8-bit PWM and 14-bit PWMX), a 16-bit free-running timer (FRT), 8-bit timer (TMR), watchdog timer (WDT), serial communication interface (SCI), I²C bus interface, keyboard buffer controller, and host interfaces (XBS and LPC). The LPC interface is explicitly excluded per documentation for DF2145BVFA10V (5-V version).

Key Specifications

Pinout & Package

DF2145BVFA10V is housed in a 144-pin plastic quad flat package (QFP) measuring 16.0 × 16.0 mm with 0.5 mm lead pitch. Pin assignment follows the H8S/2145B standard layout defined in Renesas Hardware Manual Rev.3.00 (2006), with dedicated power, ground, clock, reset, and function-multiplexed I/O terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HD64F2140BV and HD64F2141BV, DF2145BVFA10V provides double the RAM and largest flash in the H8S/214x family, enabling larger real-time OS deployments and richer feature sets without external memory - making it optimal for applications demanding both code density and data throughput.

Availability

DF2145BVFA10V is available at Aetrix Electronics and suitable for industrial PLC I/O modules, embedded test instrumentation, motor control reference designs, and legacy industrial gateways requiring stable component supply and long-term manufacturing continuity.

Supply support for DF2145BVFA10V 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The H8S/2145B belongs to the H8S/2100 Series - designed for cost-sensitive, high-reliability embedded control applications where deterministic real-time performance, integrated peripherals, and flash reprogrammability are essential.

FAQ

What is the operating voltage range for DF2145BVFA10V?

The DF2145BVFA10V operates at a nominal supply voltage of 5.0 V with a tolerance of ±10%, meaning it functions reliably from 4.5 V to 5.5 V. This 5-V specification ensures compatibility with legacy TTL/CMOS logic families and simplifies power supply design in industrial environments where regulated 5-V rails are common. All I/O pins are 5-V tolerant, and internal regulators derive core voltages accordingly.

Does DF2145BVFA10V support the LPC interface?

No, DF2145BVFA10V does not support the LPC interface. Renesas documentation explicitly states that the LPC function and associated pins (e.g., P80–P83) are not supported on the H8S/2145B (5-V version), which includes DF2145BVFA10V. While pinout diagrams show LPC-related signals, they are reserved and non-functional - only the X-bus (XBS) host interface is active for external memory expansion.

What is the maximum system clock frequency for DF2145BVFA10V?

The DF2145BVFA10V supports a maximum system clock frequency of 27 MHz, achievable using either an external crystal (1–20 MHz) with PLL multiplication or a direct external clock source. At 27 MHz, the H8S/2000 core delivers approximately 27 MIPS of processing throughput, sufficient for hard real-time control loops with sub-100 µs response times and deterministic peripheral servicing.

How much on-chip RAM does DF2145BVFA10V provide?

DF2145BVFA10V integrates 8 KB of on-chip SRAM, mapped across two non-contiguous address ranges: H'D080–H'EFFF (8 KB minus 256 bytes) and H'FF00–H'FF7F (128 bytes). This allocation supports simultaneous use of stack, heap, and peripheral buffers while maintaining compatibility with the H8S memory model. The RAM is static and retains data during low-power standby modes.

Is DF2145BVFA10V pin-compatible with other H8S/214x devices?

Yes, DF2145BVFA10V is pin-compatible with other members of the H8S/214x family in the 144-pin QFP package, including HD64F2140BV and HD64F2141BV. Identical pin assignments enable hardware reuse across variants - though functional differences exist (e.g., flash size, RAM, PWMX presence), PCB layouts remain interchangeable, allowing firmware-driven differentiation in production.