Infineon Technologies CY90F543PF-GE1

Overview

CY90F543PF-GE1 from Cypress Semiconductor is a 16-bit F2MC-16LX microcontroller with dual FULL-CAN 2.0A/B interfaces, 128 KB Flash ROM, 6 KB RAM, and 81 general-purpose I/O ports. It operates at up to 16 MHz (via on-chip PLL ×4), achieves 62.5 ns minimum instruction execution time, and targets automotive body control modules requiring CAN-based distributed networking and real-time sensor/actuator interfacing.

For engineers reviewing the CY90F543PF-GE1 datasheet, CY90F543PF-GE1 pinout, CY90F543PF-GE1 application, or CY90F543PF-GE1 equivalent, key selection criteria include dual-CAN channel support, Flash programmability with block protection, 10-bit A/D conversion across 8 channels, and QFP-100 packaging compatible with industrial temperature range (−40 °C to +105 °C) operation.

Technical Context

The CY90F543PF-GE1 implements the F2MC-16LX CPU core with 23 addressing modes, 32-bit accumulator for extended precision arithmetic, and enhanced C-language support via system stack pointer and barrel shift instructions. Its interrupt subsystem supports 8 priority levels and 34 sources including CAN message reception, timer overflows, and external edge-triggered events.

Dual CAN controllers operate independently at up to 1 Mbps, each supporting flexible mailbox/FIFO buffering, automatic retransmission, and acceptance filtering with full-bit compare/mask options. The peripheral set includes four 8/16-bit PPG timers, eight input capture channels, four output compare channels, and two 16-bit reload timers-all synchronized to the system clock (fsys/21–fsys/28).

Key Specifications

Pinout & Package

Package: QFP-100 (PQH100) - 100-pin plastic quad flat package with 0.65 mm lead pitch, RoHS-compliant, rated for −40 °C to +105 °C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MB90F548GL-S, CY90F543PF-GE1 provides dual-CAN capability essential for multi-bus architectures; versus MB90F549G-S, it trades Flash/RAM capacity for lower cost while retaining identical timing, I/O, and CAN performance.

Availability

CY90F543PF-GE1 is available at Aetrix Electronics and suitable for automotive body control units, industrial CAN gateways, and off-highway telematics systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.

Supply support for CY90F543PF-GE1 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

Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability microcontrollers and mixed-signal ICs for automotive, industrial, and IoT applications, with emphasis on functional safety and robust communication peripherals.

The MB90540G/545G series was developed specifically for automotive body electronics and industrial control systems demanding dual-CAN connectivity, Flash-based field-upgradability, and extended temperature operation without external timing or memory components.

FAQ

Does CY90F543PF-GE1 support CAN FD?

No. CY90F543PF-GE1 implements FULL-CAN compliant with ISO 11898-1:2003 (CAN 2.0A/B), supporting only standard and extended frames up to 1 Mbps. It lacks CAN FD's variable bit rate, CRC extension, and payload length enhancements. For CAN FD, consider Infineon's AURIX TC3xx family or NXP S32K3xx devices.

What is the boot vector configuration for Flash execution?

CY90F543PF-GE1 uses a hard-wired reset vector pointing to address 0x000000 in Flash memory, which contains the initial boot code. The boot sector is protected by external programming voltage (Vpp) and cannot be erased without enabling block protection disable sequence, ensuring secure firmware startup.

Can the 32 kHz sub-clock drive the RTC independently of main oscillator?

Yes. The 32 kHz sub-clock circuit operates from a dedicated crystal (X0/X1) or external 32 kHz source and remains active in Sleep and Watch modes. It drives the watchdog timer and can serve as an RTC timebase while the main 4 MHz oscillator and PLL are disabled.

Is external bus interface enabled by default?

No. The external bus interface is disabled at reset. It must be explicitly enabled via the MD0–MD2 mode pins and configured through the BUSCON register. When enabled, it supports 8-bit or 16-bit data bus access to up to 16 Mbytes of external memory space using ALE, RD, WR, and RDY signals.