Renesas UPD78F0756MC-CAB-AX

Overview

UPD78F0756MC-CAB-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/IB2 family, featuring 64 KB on-chip Flash memory, 4 KB RAM, and a 16-bit timer/event counter (TM00), 16-bit timers X0/X1 with PWM output, and 8-bit timers H1 and T51. It operates at up to 20 MHz with internal high-speed oscillator support and targets embedded control in industrial sensors and motor drives.

For engineers reviewing the UPD78F0756MC-CAB-AX datasheet, UPD78F0756MC-CAB-AX pinout, UPD78F0756MC-CAB-AX application, or UPD78F0756MC-CAB-AX equivalent, key selection considerations include its 32-pin LQFP package, integrated voltage regulator (REGC pin), AVREF/AVSS analog reference support, and compatibility with RA78K0 assembler and CC78K0 C compiler toolchains.

Technical Context

The UPD78F0756MC-CAB-AX implements the 78K0 CPU core with 1 MB address space, supporting direct, register, and indexed addressing modes. Its clock system integrates three oscillators - X1 external crystal (1–20 MHz), internal high-speed (16 MHz ±2%), and internal low-speed (15 kHz) - with programmable PLL for system clock scaling.

Peripheral integration includes dual 16-bit timers (X0/X1) with interlocking capability to comparator or INTP0, high-impedance output control for motor gate drivers, and a dedicated 16-bit timer/event counter (TM00) supporting square-wave, PPG, and pulse-width measurement modes - all confirmed for the 78K0/IB2 (32-pin) variant.

Key Specifications

Pinout & Package

UPD78F0756MC-CAB-AX is housed in a 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch) package with exposed thermal pad. Pin functions are defined for the 78K0/IB2 (32-pin) variant per Rev.5.00 User's Manual Section 2.1.4 and Figure 1.3.3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with UPD78F0756MC-CAB-AX, R5F100LEAFB#30 offers newer architecture and lower active power but sacrifices hardware safety features like HO control; UPD78F0745MC-CAB-AX provides pin-compatible footprint reduction at the cost of Flash capacity and EEPROM emulation capability.

Availability

UPD78F0756MC-CAB-AX is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and home appliance control boards requiring stable component supply across extended production lifecycles.

Supply support for UPD78F0756MC-CAB-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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and IoT markets.

The 78K0/Ix2 product line delivers cost-optimized 8-bit MCUs with integrated analog peripherals and robust real-time control features tailored for resource-constrained embedded systems in factory automation and white goods.

FAQ

What is the maximum system clock frequency supported by the UPD78F0756MC-CAB-AX?

The UPD78F0756MC-CAB-AX supports a maximum system clock frequency of 20 MHz. This is achieved using the on-chip PLL with the internal high-speed oscillator (16 MHz ±2%) as the source, or via external crystal (X1) up to 20 MHz directly. The CPU executes instructions at this frequency, and all timers-including TM00, X0/X1, and H1-are synchronized to it unless prescaled.

Does the UPD78F0756MC-CAB-AX include on-chip Flash memory with EEPROM emulation capability?

Yes, the UPD78F0756MC-CAB-AX includes 64 KB of on-chip Flash memory and supports EEPROM emulation using Renesas' official "EEPROM Emulation Library Type 01" (Document No. U18275E). This library enables reliable, wear-leveled nonvolatile data storage in designated Flash sectors, with documented endurance of 100,000 write/erase cycles per block.

What is the function of the REGC pin on the UPD78F0756MC-CAB-AX?

On the UPD78F0756MC-CAB-AX, the REGC pin controls the internal voltage regulator to select either 3.3 V or 5 V output for the I/O buffer power domain. This eliminates the need for an external LDO when interfacing with mixed-voltage peripherals and ensures consistent logic levels across all ports without external level-shifting circuitry.

Which timer modules in the UPD78F0756MC-CAB-AX support hardware interlocking with the comparator or INTP0 interrupt?

The 16-bit timers X0 and X1 in the UPD78F0756MC-CAB-AX support hardware interlocking with the comparator or INTP0 interrupt source. This feature allows automatic, cycle-accurate termination of PWM output or timer counting upon detection of overcurrent or fault conditions-bypassing CPU interrupt latency and enabling sub-microsecond response critical for motor safety.

Is the UPD78F0756MC-CAB-AX pin-compatible with other members of the 78K0/IB2 family?

Yes, the UPD78F0756MC-CAB-AX is pin-compatible with other 32-pin 78K0/IB2 microcontrollers such as UPD78F0745MC-CAB-AX and UPD78F0755MC-CAB-AX. All share identical LQFP-32 pin assignments, register maps, and peripheral configurations-enabling hardware reuse across variants differentiated primarily by Flash size (48 KB vs. 64 KB) and feature enablement (e.g., EEPROM emulation library support).