Renesas UPD78F1146GB(S)-GAH-AX

Overview

UPD78F1146GB(S)-GAH-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 16-bit timer arrays, UART, I²C, and 12-bit ADC. It operates at up to 20 MHz with supply voltage range 2.7–5.5 V and targets embedded control in industrial and consumer equipment.

For engineers reviewing the UPD78F1146GB(S)-GAH-AX datasheet, UPD78F1146GB(S)-GAH-AX pinout, UPD78F1146GB(S)-GAH-AX application, or UPD78F1146GB(S)-GAH-AX equivalent, key selection criteria include Flash endurance (100k write/erase cycles), operating temperature range (−40°C to +85°C), and support for on-chip debug via single-wire interface - all critical for cost-sensitive, long-lifecycle industrial control designs.

Technical Context

The UPD78F1146GB(S)-GAH-AX implements the 78K0R CPU core with 16-bit ALU, 24-bit address space, and Harvard architecture. It integrates a 12-bit successive-approximation ADC with 16 input channels, four 16-bit timer arrays supporting PWM and input capture, and dual serial interfaces (UART and I²C) with clock synchronization logic.

Its power management includes HALT, STOP, and SNOOZE modes with wake-up capability from multiple sources (external interrupt, timer, serial receive). The device uses SuperFlash® technology licensed from Silicon Storage Technology for reliable Flash programming and supports self-programming during user operation.

Key Specifications

Pinout & Package

UPD78F1146GB(S)-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 analog/digital resources.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F1146GB(S)-GAH-AX, R5F100LEAFB#30 offers superior power efficiency but omits hardware CRC, while MB95F622KPMC-GSE1 delivers higher clock throughput at the cost of increased design complexity and toolchain divergence.

Availability

UPD78F1146GB(S)-GAH-AX is available at Aetrix Electronics and suitable for industrial motor control, smart home sensor hubs, and factory automation I/O modules requiring stable component supply and long-term manufacturing continuity.

Supply support for UPD78F1146GB(S)-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 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 - including UPD78F1146GB(S)-GAH-AX - was designed for cost-effective, robust embedded control in industrial equipment and consumer appliances where reliability, Flash endurance, and mixed-signal integration are essential.

FAQ

What is the maximum operating frequency of the UPD78F1146GB(S)-GAH-AX?

The UPD78F1146GB(S)-GAH-AX supports a maximum system clock frequency of 20 MHz using its internal oscillator or external crystal. This frequency is fully supported across the entire operating voltage range (2.7–5.5 V) and temperature range (−40°C to +85°C), enabling deterministic timing for real-time control tasks such as motor commutation and sensor sampling without clock scaling penalties. The 78K0R CPU core delivers consistent 1.15 DMIPS/MHz performance at this rate.

Does the UPD78F1146GB(S)-GAH-AX support in-system programming (ISP)?

Yes, the UPD78F1146GB(S)-GAH-AX supports in-system programming via its built-in UART or I²C interface using the on-chip self-programming library. This allows firmware updates without removing the device from the target board, leveraging the integrated SuperFlash® technology that guarantees 100,000 write/erase cycles and 20-year data retention. The UPD78F1146GB(S)-GAH-AX requires no external high-voltage programming signal - only standard logic-level serial communication.

What debug interface does the UPD78F1146GB(S)-GAH-AX provide?

The UPD78F1146GB(S)-GAH-AX features a single-wire debug (SWD) interface compliant with Renesas' standard on-chip debugging protocol. It supports full real-time debugging capabilities including breakpoints, watchpoints, memory inspection, and register access without halting peripheral operation. This interface is implemented on dedicated pins (RES# and P10/DEBUG) and requires no additional hardware beyond a Renesas E2 or E2 Lite debugger - eliminating the need for complex JTAG cabling or external emulators during development of the UPD78F1146GB(S)-GAH-AX.

Is the UPD78F1146GB(S)-GAH-AX qualified for automotive applications?

No, the UPD78F1146GB(S)-GAH-AX is rated for Standard quality grade per Renesas' classification and is intended for industrial, consumer, and office equipment - not automotive use. It meets AEC-Q100 requirements only for temperature range (−40°C to +85°C), but lacks automotive-specific qualifications such as PPAP documentation, zero-defect screening, or extended reliability testing. For automotive applications, Renesas recommends the RL78/F1x or RH850 families instead of the UPD78F1146GB(S)-GAH-AX.

What is the role of the REGC pin on the UPD78F1146GB(S)-GAH-AX?

On the UPD78F1146GB(S)-GAH-AX, the REGC pin connects an external 1 μF ceramic capacitor to stabilize the internal voltage regulator that powers the analog circuitry (ADC, comparator, and reference). This capacitor must be placed as close as possible to the REGC and AVSS pins to minimize impedance and prevent analog measurement errors. Failure to connect the correct capacitor value or placement degrades ADC accuracy and may cause intermittent reset behavior - a critical design requirement explicitly specified in the UPD78F1146GB(S)-GAH-AX hardware manual.