Renesas UPD78F0730MC-CAB-AX

Overview

UPD78F0730MC-CAB-AX from Renesas Electronics is an 8-bit single-chip microcontroller featuring 128 KB Flash memory, 8 KB RAM, and integrated USB 2.0 full-speed controller. It operates at up to 20 MHz CPU clock, supports 5V operation, and includes 48 I/O pins, 12-bit ADC (8 channels), and multiple timers including watchdog and real-time clock. It targets embedded control in industrial HMI and USB-connected sensor nodes.

For engineers reviewing the UPD78F0730MC-CAB-AX datasheet, UPD78F0730MC-CAB-AX pinout, UPD78F0730MC-CAB-AX application, or UPD78F0730MC-CAB-AX equivalent, key selection criteria include USB interface integration, Flash endurance (100K write/erase cycles), 5V tolerance on all I/Os, and support for in-system programming via on-chip bootloader.

Technical Context

The UPD78F0730MC-CAB-AX implements the 78K/0 CPU core with Harvard architecture, supporting 131 instructions and 8-level hardware stack. Its clock system combines internal high-speed (20 MHz) and low-speed (15 kHz) oscillators with programmable prescalers and automatic fail-safe switching to backup clock sources.

USB functionality is implemented as a full-speed (12 Mbps) device controller compliant with USB Specification Rev. 2.0, with dedicated USB PHY, endpoint buffers (up to 64 bytes per endpoint), and descriptor-based enumeration. All peripheral modules-including ADC, UART, I²C, and PWM-are memory-mapped and accessible via SFRs with interrupt-driven operation.

Key Specifications

Pinout & Package

UPD78F0730MC-CAB-AX is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are defined per Renesas User's Manual Rev.3.00 (Sep 2011), Section 1.4 and Chapter 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0730MC-CAB-AX, R5F104PJAFB#30 offers lower active current but removes USB integration entirely, while STM8S208MBT6 provides similar Flash capacity but demands external USB hardware and software stack development - both require board redesign and firmware adaptation not needed with UPD78F0730MC-CAB-AX.

Availability

UPD78F0730MC-CAB-AX is available at Aetrix Electronics and suitable for industrial HMI panels, USB sensor nodes, and legacy equipment adapters requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for UPD78F0730MC-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The UPD78F0730MC-CAB-AX belongs to the 78K0 family - a line of 8-bit MCUs designed for cost-sensitive, reliability-critical embedded control applications where USB connectivity, 5V operation, and Flash endurance are essential.

FAQ

What is the maximum operating frequency of the UPD78F0730MC-CAB-AX CPU core?

The UPD78F0730MC-CAB-AX CPU core operates at a maximum frequency of 20 MHz using the internal high-speed oscillator or external crystal. This frequency is achievable across the full 4.0 V to 5.5 V supply range and supports instruction execution at one cycle per instruction for most operations. The UPD78F0730MC-CAB-AX user manual confirms this rating under "Electrical Specifications" with timing margins verified at worst-case voltage and temperature conditions.

Does the UPD78F0730MC-CAB-AX support in-system programming via USB?

Yes, the UPD78F0730MC-CAB-AX supports in-system programming (ISP) via its integrated USB interface using the on-chip bootloader. The bootloader is pre-programmed in ROM and enables Flash memory reprogramming without external hardware programmers. UPD78F0730MC-CAB-AX requires no external components beyond standard USB termination resistors and can accept Intel HEX or binary firmware images through vendor-defined USB class commands.

What USB speed and device class capabilities does the UPD78F0730MC-CAB-AX provide?

The UPD78F0730MC-CAB-AX implements a full-speed USB 2.0 device controller compliant with USB Specification Rev. 2.0, operating at 12 Mbps. It supports control, interrupt, bulk, and isochronous transfer types with up to four endpoints (including control endpoint 0). UPD78F0730MC-CAB-AX does not implement USB host or OTG functionality - it operates exclusively as a USB device.

Is the UPD78F0730MC-CAB-AX pin-compatible with other members of the 78K0 family?

No, the UPD78F0730MC-CAB-AX is not pin-compatible with other 78K0 devices due to its unique 64-pin LQFP package and dedicated USB signal assignments (P30–P33). While functional registers and instruction set are consistent across the 78K0 family, pin mapping, peripheral allocation, and package dimensions differ significantly between variants. Migration to another 78K0 part requires PCB redesign and I/O remapping.

What is the Flash endurance specification for the UPD78F0730MC-CAB-AX?

The UPD78F0730MC-CAB-AX specifies 100,000 write/erase cycles for its 128 KB on-chip Flash memory, as documented in the Renesas 78K0 Flash Memory Programming Application Note (U17739E). This endurance applies to standard erase/program operations under recommended voltage and temperature conditions and supports robust field firmware updates throughout product lifetime.