Infineon Technologies CY96F346ASBPMCR-GS-UJE2

Overview

CY96F346ASBPMCR-GS-UJE2 from Infineon Technologies (formerly Cypress) is a 16-bit F2MC-16FX microcontroller with dual-clock architecture, 416 KB Flash (Flash A), 16 KB RAM, integrated CAN 2.0A/B controller (2 channels), 24-channel 10-bit SAR ADC, and on-chip PLL supporting up to 56 MHz CPU operation from a 4 MHz resonator. It targets automotive body control modules requiring ISO16845-certified CAN communication, low-voltage reset persistence, and EMI-optimized clock modulation.

For engineers reviewing the CY96F346ASBPMCR-GS-UJE2 datasheet, CY96F346ASBPMCR-GS-UJE2 pinout, CY96F346ASBPMCR-GS-UJE2 application, or CY96F346ASBPMCR-GS-UJE2 equivalent, key selection criteria include dual-clock domain support (main + subclock), 2-channel CAN with programmable FIFO and loop-back self-test, 24 ADC inputs with dual reference voltage switching, and 100-pin LQFP package with multiplexed external bus interface.

Technical Context

The CY96F346ASBPMCR-GS-UJE2 implements the F2MC-16FX CPU core with instruction pipeline for RISC-like performance, backward-compatible with 16LX software. It supports independent clock domains for CPU and peripherals via selectable sources: 3–16 MHz crystal, 32–100 kHz subclock quartz, or 100 kHz/2 MHz internal RC oscillator - enabled by part number suffix "S" indicating single-clock configuration with low-voltage reset disabled.

Its system-level timing architecture includes an on-chip PLL (x1–x25 multiplier), clock modulator for EMI reduction, and voltage regulator lowering internal CPU voltage. Peripheral timing is decoupled via programmable prescalers across reload timers (4 channels + 1 PPG-dedicated), free-running timers (2 channels), and input capture/output compare units (8 channels each).

Key Specifications

Pinout & Package

Package: 100-pin LQFP (Leadless Quad Flat Package), 14 mm × 14 mm body, 0.5 mm pitch, exposed thermal pad (not electrically connected). Pinout validated per Cypress/Infineon datasheet 002-04579 Rev. *C, pages 7–11.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MB91F567A and S9KEAZ128AMLH, CY96F346ASBPMCR-GS-UJE2 provides native dual CAN with ISO16845 certification, larger Flash (416 KB) for multi-application partitioning, and dual-reference ADC for mixed-signal sensor fusion - making it optimal for cost-sensitive, high-integration automotive body electronics where CAN determinism and analog channel density are critical.

Availability

CY96F346ASBPMCR-GS-UJE2 is available at Aetrix Electronics and suitable for automotive body control modules, industrial CAN gateways, smart HVAC controllers, and off-highway telematics units requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned qualification.

Supply support for CY96F346ASBPMCR-GS-UJE2 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive MCUs, and security solutions with strong vertical integration and automotive qualification expertise.

CY96F346ASBPMCR-GS-UJE2 belongs to the F2MC-16FX microcontroller family, designed specifically for cost-optimized, EMI-resilient automotive body electronics and industrial control applications requiring dual-clock operation, integrated CAN, and high analog channel density.

FAQ

What clock sources does CY96F346ASBPMCR-GS-UJE2 support, and how are they selected?

The device supports three primary clock sources: 3–16 MHz external crystal/resonator (X0/X1), 32–100 kHz subclock quartz (X0A/X1A), and 100 kHz/2 MHz internal RC oscillator. Clock selection is configured per domain (CPU vs. peripheral buses) via the Clock & Mode Controller registers. The "S" suffix confirms single-clock configuration with LVR disabled, meaning subclock is not used for reset - only for RTC or low-power timers if explicitly enabled.

Does CY96F346ASBPMCR-GS-UJE2 support CAN FD or only classical CAN 2.0?

CY96F346ASBPMCR-GS-UJE2 supports only CAN 2.0 Part A and B (ISO 11898-1:2003), with bit rates up to 1 Mbit/s and ISO16845 physical-layer conformance certification. It does not implement CAN FD features such as flexible data-rate, extended data length, or CRC enhancements. Its CAN controllers are optimized for deterministic, time-triggered messaging in legacy automotive networks.

How is Flash security implemented, and can it be disabled after programming?

Flash Security is enforced via a dedicated lock bit in the Flash control register. Once set, it permanently disables external read access to user ROM and prevents unauthorized firmware extraction. The lock bit is one-time programmable and cannot be cleared without full chip erase - which also erases all Flash contents. This mechanism meets automotive functional safety requirements for IP protection and bootloader integrity.

What is the role of the Memory Patch Function, and how is it used in production firmware?

The Memory Patch Function allows runtime redirection of ROM code execution to RAM-resident patches, enabling field updates without full Flash reprogramming. In production, it is used to fix critical bugs or add minor features post-deployment by loading patched routines into designated RAM blocks and updating vector table entries - all under secure boot supervision to prevent unauthorized modification.