Renesas UPD78F1156AGC-GAD-AX

Overview

UPD78F1156AGC-GAD-AX from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/KF3 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 industrial control and sensor interface applications requiring deterministic real-time response.

For engineers reviewing the UPD78F1156AGC-GAD-AX datasheet, UPD78F1156AGC-GAD-AX pinout, UPD78F1156AGC-GAD-AX application, or UPD78F1156AGC-GAD-AX equivalent, key selection considerations include its 100-pin LQFP package, Flash endurance (100,000 write/erase cycles), operating temperature range (−40°C to +85°C), and support for on-chip debug via single-wire interface.

Technical Context

The UPD78F1156AGC-GAD-AX implements the 78K0R CPU core with 16-bit architecture, Harvard memory organization, and instruction set compatible with earlier 78K0 devices. It integrates a programmable low-voltage detector (LVD) with 4 selectable thresholds and supports multiple clock sources: main system clock (up to 20 MHz), sub-clock (32.768 kHz), and on-chip oscillator (1 MHz).

Peripheral integration includes a 16-bit multifunction timer array unit (TAU) with capture/compare/PWM functions, a serial array unit (SAU) configurable as UART/I²C/SPI, and an 8-channel DMA controller supporting memory-to-peripheral and peripheral-to-peripheral transfers without CPU intervention.

Key Specifications

Pinout & Package

UPD78F1156AGC-GAD-AX is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignment follows Renesas' standard 78K0R/KF3 layout, supporting full I/O flexibility across 14 ports (P0–P14), analog inputs, power/ground distribution, and dedicated debug/reset signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F1156AGC-GAD-AX, R5F100LGSP offers lower power and newer architecture but reduced memory and peripheral integration, while UPD78F1144GC-GAD-AX provides identical footprint and peripheral compatibility at lower memory capacity-enabling direct migration where code size permits.

Availability

UPD78F1156AGC-GAD-AX is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and home appliance control boards requiring stable component supply and long-term production continuity.

Supply support for UPD78F1156AGC-GAD-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, power, and SoC solutions.

The 78K0R/KF3 product line delivers cost-optimized 16-bit MCUs for industrial and consumer applications demanding high reliability, rich analog integration, and mature toolchain support-including legacy code migration paths from earlier 78K families.

FAQ

What is the maximum operating frequency of the UPD78F1156AGC-GAD-AX?

The UPD78F1156AGC-GAD-AX operates at a maximum system clock frequency of 20 MHz, delivering up to 1.25 MIPS per MHz. This frequency is supported across the full industrial temperature range (−40°C to +85°C) and supply voltage range (2.7–5.5 V), with clock source options including external crystal, ceramic resonator, or internal oscillator.

Does the UPD78F1156AGC-GAD-AX support in-system programming (ISP)?

Yes, the UPD78F1156AGC-GAD-AX supports in-system programming via its on-chip debug interface (OCDS) using single-wire communication. Firmware updates can be performed without removing the device from the target board, leveraging the built-in Flash memory controller and data flash area for safe dual-bank or page-erase operations during runtime.

What are the ADC specifications of the UPD78F1156AGC-GAD-AX?

The UPD78F1156AGC-GAD-AX integrates a 10-bit successive-approximation ADC with 16 input channels, 1.1 µs conversion time, and selectable reference voltages (internal 2.5 V or external AVREF0/AVREF1). It supports scan mode, continuous conversion, and hardware trigger synchronization with timers for precise sampling timing.

Is the UPD78F1156AGC-GAD-AX pin-compatible with other 78K0R/KF3 devices?

Yes, the UPD78F1156AGC-GAD-AX shares the same 100-pin LQFP package and pin assignment with other members of the 78K0R/KF3 family, including UPD78F1152AGC-GAD-AX through UPD78F1155AGC-GAD-AX and UPD78F1144GC-GAD-AX. This enables hardware reuse across variants differing only in Flash/RAM size and peripheral enablement.

What debug interfaces does the UPD78F1156AGC-GAD-AX support?

The UPD78F1156AGC-GAD-AX supports single-wire on-chip debug (OCDS) compliant with Renesas' standard debug protocol. It enables full visibility into CPU registers, memory, and peripheral states, with breakpoints, watchpoints, real-time trace, and non-intrusive execution control-compatible with Renesas E2 emulator and CS+ IDE.