Infineon Technologies CY8C29566-24AXI

Overview

CY8C29566-24AXI from Infineon Technologies (formerly Cypress Semiconductor) is a PSoC® 1 programmable system-on-chip integrating an M8C 8-bit Harvard-architecture CPU, 32 KB flash, 2 KB SRAM, and configurable analog/digital blocks. It operates from 3.0 V to 5.25 V at up to 24 MHz, supports industrial temperature range (–40 °C to +85 °C), and delivers rail-to-rail analog functionality including 14-bit ADCs and 9-bit DACs - used in embedded sensor interface and motor control subsystems.

For engineers reviewing the CY8C29566-24AXI datasheet, CY8C29566-24AXI pinout, CY8C29566-24AXI application, or CY8C29566-24AXI equivalent, key selection criteria include its 24 MHz M8C core speed, ±5% internal oscillator tolerance (±2.5% at 0–70 °C), 25 mA GPIO sink capability, on-chip switch-mode pump for 1.0 V operation, and support for up to four UARTs and two SPI interfaces.

Technical Context

The CY8C29566-24AXI implements a fixed-function M8C core with interrupt controller (17 vectors), sleep/watchdog timers, and programmable clock dividers. Its digital system comprises 16 reconfigurable 8-bit PSoC blocks enabling composite peripherals such as 8–32-bit timers, PWMs with dead-band, CRC/PRS modules, and up to two full-duplex UARTs.

Analog resources include 12 rail-to-rail PSoC blocks supporting decimator-based 14-bit ΔΣ ADCs, 9-bit current-steering DACs, PGAs with gain up to 48×, and programmable filters/comparators - all routed via global analog interconnect to eight standard and four restricted analog input pins.

Key Specifications

Pinout & Package

Package: 44-pin TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable mixed-signal controller applications.

Compared with CY8C29466-24AXI, this part doubles flash and SRAM for complex firmware; compared with CY8C29666-24AXI, it trades I/O count and package size for compact board area - ideal for cost- and space-constrained industrial controllers where 40 GPIOs and 32 KB flash suffice.

Availability

CY8C29566-24AXI is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control interfaces, smart lighting controllers, and medical diagnostic front-ends requiring stable component supply, long-term lifecycle support, and qualified automotive-grade traceability.

Supply support for CY8C29566-24AXI 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, delivering power management, sensing, connectivity, and security solutions for industrial, automotive, and IoT applications.

This device belongs to the PSoC® 1 family - Infineon's first-generation programmable mixed-signal SoC platform designed to replace discrete analog/digital components with a single configurable chip for cost-sensitive, medium-complexity embedded control.

FAQ

What development tools are required to program and debug the CY8C29566-24AXI?

PSoC Designer™ (free Windows IDE) is the official development environment, supporting drag-and-drop peripheral configuration, API generation, and C coding. Programming and debugging require MiniProg3 or compatible SWD programmer; MiniProg1 is not supported for this device due to voltage and protocol limitations. In-circuit emulation provides full-speed execution, 128 KB trace memory, and complex breakpoint triggering.

Does the CY8C29566-24AXI support true hardware UART with automatic baud rate detection?

No - it implements UART via configurable digital PSoC blocks with fixed baud rate generation using internal clocks or external timing sources. Baud rate is set at compile time via PSoC Designer parameters; no runtime auto-baud detection circuitry exists. Achievable rates range from 300 bps to 1 Mbps depending on system clock and divisor settings, with typical accuracy ±2% using IMO at 24 MHz.

Can the on-chip switch-mode pump (SMP) power both analog and digital sections below 3.0 V?

Yes - the SMP boosts input voltage to sustain digital core and analog block operation down to 1.0 V supply. However, analog performance specifications (e.g., ADC ENOB, DAC linearity) are only guaranteed above 3.0 V per datasheet; operation at 1.0–2.9 V is functional but with degraded SNR and increased offset drift - validated for wake-up sensing and ultra-low-power sleep mode, not precision measurement.

Is the 14-bit ADC in the CY8C29566-24AXI differential or single-ended by default?

The 14-bit ΔΣ ADC is inherently differential - it requires VREF+ and VREF– inputs for full-scale conversion. Single-ended operation is supported by tying VREF– to VSS and routing signal to VREF+, but effective resolution drops to ≤12 bits due to common-mode noise coupling and reduced dynamic range. Datasheet specifies 14-bit performance only under true differential input conditions with proper PCB layout and reference decoupling.