Renesas UPD78F0537AGB-GAH-AX

Overview

UPD78F0537AGB-GAH-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/KE2 family, featuring 128 KB Flash memory, 8 KB RAM, and a maximum CPU clock of 20 MHz. It integrates 10-bit ADC (8 channels), UART, I²C, and 16-bit timer arrays, and targets embedded control in industrial sensors and motor drive interfaces.

For engineers reviewing the UPD78F0537AGB-GAH-AX datasheet, UPD78F0537AGB-GAH-AX pinout, UPD78F0537AGB-GAH-AX application, or UPD78F0537AGB-GAH-AX equivalent, key selection criteria include Flash endurance (100,000 erase/write cycles), operating voltage range (2.7–5.5 V), and support for on-chip debug via single-wire interface.

Technical Context

The UPD78F0537AGB-GAH-AX implements the 78K0 CPU core with 16-bit addressing, supporting up to 1 MB linear address space via bank switching. Its peripheral set includes three 16-bit timer arrays (each with capture/compare/PWM), a watchdog timer with independent clock source, and a programmable low-voltage detection circuit.

It uses SuperFlash® technology licensed from SST for Flash memory, enabling 100 μs typical byte programming and 10 ms typical sector erase. The device supports two power-saving modes-HALT and STOP-with wake-up via external interrupt or internal timer event.

Key Specifications

Pinout & Package

UPD78F0537AGB-GAH-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 per port group (P0–P7, P12–P14) and dedicated peripherals including RESET, REGC, FLMD0, AVREF, and EVDD/EVSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0537AGB-GAH-AX, R5F104PJAFB#30 offers superior energy efficiency but requires external regulation and has less memory; UPD78F0536AGB-GAH-AX shares full pin and peripheral compatibility while reducing Flash capacity by 32 KB - enabling direct substitution in space-constrained layouts without redesign.

Availability

UPD78F0537AGB-GAH-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, BLDC motor controllers, smart meter interfaces, and factory automation I/O modules requiring stable component supply across multi-year production cycles.

Supply support for UPD78F0537AGB-GAH-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, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The UPD78F0537AGB-GAH-AX belongs to the 78K0/KE2 product line, designed specifically for cost-effective, high-reliability embedded control in industrial equipment where Flash endurance, mixed-signal integration, and debug accessibility are critical.

FAQ

What is the maximum operating frequency of the UPD78F0537AGB-GAH-AX?

The UPD78F0537AGB-GAH-AX supports a maximum CPU clock frequency of 20 MHz. This is achieved using the on-chip high-speed oscillator or an external crystal (X1) up to 20 MHz, with optional 2x prescaler for lower-frequency operation. All peripherals-including timers, UART, and ADC-remain fully functional at this speed, and the device executes instructions with zero wait states in most configurations.

Does the UPD78F0537AGB-GAH-AX include an internal voltage regulator?

Yes, the UPD78F0537AGB-GAH-AX integrates an on-chip 3.3 V regulator powered from the main VDD supply. The REGC pin requires a 1.0 μF ceramic capacitor to ground for stability. This regulator powers internal logic and the ADC reference, eliminating the need for an external LDO in many 3.3 V system designs - a feature confirmed in the Renesas 78K0/Kx2 Hardware User's Manual Rev.4.01.

How many ADC channels does the UPD78F0537AGB-GAH-AX support, and what is its resolution?

The UPD78F0537AGB-GAH-AX features a 10-bit successive approximation ADC with eight analog input channels (AN0–AN7), all mapped to Port 2 pins. Conversion time is 1.2 μs per sample under typical conditions, and the ADC supports both internal (AVREF) and external reference configurations. This specification is explicitly listed in Section 2.2.3 of the 78K0/Kx2 User's Manual.

Is the UPD78F0537AGB-GAH-AX pin-compatible with other devices in the 78K0/KE2 family?

Yes, the UPD78F0537AGB-GAH-AX shares the same 100-pin LQFP package and pinout with other 78K0/KE2 devices including UPD78F0536AGB-GAH-AX and UPD78F0531AGB-GAH-AX. Pin functions for ports, peripherals, power, and reset are identical across the family - enabling hardware reuse when migrating between Flash sizes or feature subsets within the KE2 group.

What debug interface does the UPD78F0537AGB-GAH-AX support?

The UPD78F0537AGB-GAH-AX supports Renesas' single-wire debug (SWD) interface via the RES# pin, enabling full in-circuit debugging, flash programming, and real-time trace without requiring additional pins. This interface is compatible with QB-MINI2 and E2 emulator tools, and is documented in Chapter 2 and Appendix D of the 78K0/Kx2 Hardware User's Manual Rev.4.01.