Infineon Technologies CY8C6316BZI-BLF54

Overview

CY8C6316BZI-BLF54 from Infineon is a dual-core Arm® Cortex®-M4F/M0+ microcontroller with integrated Bluetooth® 5.0 LE radio, 1-MB flash, 288-KB SRAM, and programmable analog/digital peripherals. It operates from 1.7 V to 3.6 V, achieves 7 µA Deep Sleep current with 64-KB SRAM retention, and supports QSPI XIP with on-the-fly encryption - deployed in battery-powered IoT edge nodes requiring secure wireless sensor aggregation.

For engineers reviewing the CY8C6316BZI-BLF54 datasheet, CY8C6316BZI-BLF54 pinout, CY8C6316BZI-BLF54 application, or CY8C6316BZI-BLF54 equivalent, key selection criteria include dual-CPU power efficiency (22 µA/MHz @ 0.9 V M4), BLE link-layer concurrency (4 simultaneous connections), SMIF throughput (up to 640 Mbps), and CAPSENSE™ liquid-tolerant proximity sensing capability.

Technical Context

The device implements a tightly coupled dual-CPU subsystem where the Cortex-M4F handles real-time signal processing and security-critical tasks while the Cortex-M0+ manages BLE protocol stack and low-power background operations via IPC and shared memory. Its Bluetooth subsystem includes a 2.4-GHz RF transceiver with –95 dBm RX sensitivity, programmable TX power up to +4 dBm, and hardware-accelerated Link Layer supporting master/slave roles.

Power management leverages six configurable modes, an on-chip SIMO buck converter (<1 µA quiescent current), and a backup domain with RTC and 64-byte memory. Clocking combines an 8-MHz IMO (±2%), 32-kHz ILO, crystal oscillators (16–35 MHz & 32 kHz), FLL, PLL, and fractional dividers for precise peripheral timing across voltage/frequency scaling points.

Key Specifications

Pinout & Package

Package: 104-ball Wafer-Level Chip-Scale Package (WLCSP), 0.4-mm pitch, 4.2 mm × 4.2 mm body size, bottom-side thermal pad, RoHS-compliant, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core BLE MCU applications.

Compared with nRF52840 and DA1469x, CY8C6316BZI-BLF54 uniquely integrates dual-CPU voltage scaling, on-die BLE + SMIF encryption, and CAPSENSE™ with SmartSense - enabling consolidated sensor-to-cloud firmware with deterministic power budgeting and zero-calibration touch interfaces.

Availability

CY8C6316BZI-BLF54 is available at Aetrix Electronics and suitable for wireless sensor nodes, smart home hubs, industrial predictive maintenance systems, and medical wearables requiring stable component supply, long-term lifecycle support, and qualified BLE 5.0 compliance.

Supply support for CY8C6316BZI-BLF54 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 German semiconductor leader specializing in power management, automotive MCUs, and secure connectivity solutions, with global manufacturing and R&D infrastructure.

The PSoC™ 63 product line delivers purpose-built, ultra-low-power dual-core MCUs with integrated BLE 5.0 and programmable analog/digital fabric - designed specifically for secure, battery-operated IoT endpoints demanding hardware-enforced trust and mixed-signal flexibility.

FAQ

What is the maximum operating frequency of the Cortex-M4F core in CY8C6316BZI-BLF54?

The Cortex-M4F core operates at up to 150 MHz when powered at 1.1 V, and at reduced frequency scaling under 0.9 V core voltage to maintain timing closure and ultra-low power operation. Frequency is dynamically managed via the clock system's PLL and FLL, with integer/fractional dividers enabling precise peripheral clock derivation independent of CPU speed.

Does CY8C6316BZI-BLF54 support over-the-air (OTA) firmware updates via BLE?

Yes - the device supports secure OTA updates using its 1-MB flash with read-while-write capability, dual-bank boot code architecture, and ROM-based Secure Boot. Firmware images are authenticated before execution, and the cryptography accelerator handles AES-CTR encryption/decryption and ECDSA signature verification during download and installation phases.

Can the Smart I/O™ blocks operate independently during Deep Sleep mode?

Yes - two dedicated Smart I/O™ ports (16 total pins) remain fully functional in Deep Sleep mode, executing Boolean logic (AND, OR, XOR, NOT) on input pin states without CPU intervention. This enables wake-on-pattern detection, such as detecting a specific button press sequence or sensor event combination, while consuming approximately 1 µA total system current.

Is an external crystal required for Bluetooth 5.0 operation?

No - the integrated 32-kHz ILO provides sufficient timing accuracy for BLE advertising and connection intervals, though a 32-kHz crystal improves long-term timing stability and reduces connection drift. The 2.4-GHz RF transceiver uses its internal VCO and PLL; no external RF components beyond antenna matching are required for basic BLE operation.