Renesas UPD78F1142AGA-HAB-AX

Overview

UPD78F1142AGA-HAB-AX from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/KE3 family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and integrated peripherals including 10-bit ADC (16 channels), UART, I²C, and 16-bit timer arrays. It operates at up to 20 MHz with supply voltage range 2.7–5.5 V and targets embedded control in industrial sensors and motor-driven appliances.

For engineers reviewing the UPD78F1142AGA-HAB-AX datasheet, UPD78F1142AGA-HAB-AX pinout, UPD78F1142AGA-HAB-AX application, or UPD78F1142AGA-HAB-AX equivalent, key selection criteria include its 100-pin LQFP package, Flash endurance (100,000 write/erase cycles), ROMless boot mode support, and compliance with industrial-grade temperature range (−40°C to +85°C).

Technical Context

The UPD78F1142AGA-HAB-AX implements the 78K0R CPU core with 16-bit architecture, Harvard memory organization, and instruction set compatible with earlier 78K0 devices. It integrates a 32-bit programmable watchdog timer, low-voltage detection circuit (LVD) with 4 selectable thresholds, and on-chip debug interface supporting real-time trace via QB-MINI2 emulator.

Its peripheral suite includes two 16-bit timer arrays (each with 32-bit capture/compare capability), a 10-bit ADC with sample-and-hold and hardware-triggered conversion, and dual serial interfaces (UART channel with LIN support and I²C-compatible interface). The device supports multiple clock sources: main system clock (up to 20 MHz), sub-clock (32.768 kHz), and on-chip oscillator (1 MHz).

Key Specifications

Pinout & Package

UPD78F1142AGA-HAB-AX is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined across 15 I/O ports (P0–P7, P12–P14), analog inputs (AVREF, AVSS), power terminals (VDD/EVDD, VSS/EVSS), reset (RESET), regulator control (REGC), and mode selection (FLMD0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F1142AGA-HAB-AX, R5F100LEAFB#30 offers superior energy efficiency but sacrifices boot flexibility, while UPD78F1144AGA-GAH-AX delivers scalable memory headroom with full hardware compatibility - making it the only true pin- and function-compatible upgrade path.

Availability

UPD78F1142AGA-HAB-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control, and building automation controllers requiring stable component supply across multi-year production cycles.

Supply support for UPD78F1142AGA-HAB-AX 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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.

The 78K0R/KE3 product line was designed for cost-sensitive, high-reliability industrial embedded applications requiring deterministic real-time performance, robust peripheral integration, and long-term supply stability - particularly in motor control and sensor interface systems.

FAQ

What is the maximum operating frequency of the UPD78F1142AGA-HAB-AX?

The UPD78F1142AGA-HAB-AX supports a maximum system clock frequency of 20 MHz when using an external crystal oscillator. Its internal 78K0R CPU core operates at up to 16 MHz in high-speed mode, with instruction execution completing in one or two clock cycles depending on opcode. This timing allows deterministic response within 62.5 ns for critical interrupt service routines, essential for motor control loop stability.

Does the UPD78F1142AGA-HAB-AX support in-system programming (ISP)?

Yes, the UPD78F1142AGA-HAB-AX supports in-system programming via its on-chip debug interface and dedicated Flash programming circuitry. Using Renesas' PG-FP4 or PG-FP5 programmers with the UPD78F1142AGA-HAB-AX's built-in bootloader, firmware updates can be performed without removing the device from the target board. The UPD78F1142AGA-HAB-AX requires no external high-voltage programming signals - all necessary voltages are generated internally during programming sequences.

What is the purpose of the REGC pin on the UPD78F1142AGA-HAB-AX?

The REGC pin on the UPD78F1142AGA-HAB-AX controls the internal voltage regulator that supplies the EVDD/EVSS domain. When REGC is driven high, the regulator is enabled, providing a stable 3.3 V output for analog and I/O circuits; when low, the regulator is disabled and EVDD must be externally supplied. This feature allows dynamic power management and mixed-voltage operation - critical for interfacing with both 3.3 V sensors and 5 V actuators in the same UPD78F1142AGA-HAB-AX-based system.

Can the UPD78F1142AGA-HAB-AX operate without an external crystal?

Yes, the UPD78F1142AGA-HAB-AX can operate using its internal 1 MHz on-chip oscillator as the main clock source, eliminating the need for an external crystal in cost-sensitive or space-constrained designs. However, this configuration limits maximum CPU speed to 1 MHz and reduces timing precision - making it suitable for non-critical background tasks. For real-time control requiring accurate timing, the UPD78F1142AGA-HAB-AX supports external crystals up to 20 MHz or ceramic resonators with built-in capacitors.

How many ADC channels does the UPD78F1142AGA-HAB-AX support, and what is their resolution?

The UPD78F1142AGA-HAB-AX integrates a 10-bit successive approximation ADC with 16 configurable input channels (AN0–AN15), mapped across ports P1, P4, and P5. Each conversion completes in 12.5 µs at maximum clock rate, supporting hardware-triggered sampling synchronized to timer events or external signals. This ADC capability enables simultaneous monitoring of multiple analog sensors - such as thermistors, pressure transducers, and current shunts - within a single UPD78F1142AGA-HAB-AX-based control system.