Infineon Technologies CY8CTMG201-32LQXI

Overview

CY8CTMG201-32LQXI from Cypress Semiconductor is a programmable system-on-chip (PSoC) integrating an M8C 8-bit CPU core, TrueTouch capacitive sensing subsystem, I²C slave interface, full-speed USB 2.0 transceiver, and configurable analog/digital peripherals. It features 16 KB flash, 2 KB SRAM, operates at up to 24 MHz, and supports 32-pin LQFP packaging with 25 GPIOs. It is designed for embedded human-interface applications requiring robust touch sensing and USB connectivity.

For engineers reviewing the CY8CTMG201-32LQXI datasheet, CY8CTMG201-32LQXI pinout, CY8CTMG201-32LQXI application, or CY8CTMG201-32LQXI equivalent, this device requires attention to its TrueTouch analog front-end configuration, USB PHY termination requirements, IMO/ILO clock calibration sequence, and flash protection register settings during firmware development.

Technical Context

The CY8CTMG201-32LQXI implements a mixed-signal PSoC architecture centered on the M8C CPU core with Harvard architecture, 24 MHz internal main oscillator (IMO), and low-power internal low-speed oscillator (ILO) for sleep-mode timing. Its TrueTouch subsystem includes dedicated analog multiplexers, comparators, and sigma-delta modulators optimized for self- and mutual-capacitance touch sensing.

Digital resources include a programmable 16-bit timer, SPI and I²C slave interfaces, full-speed USB 2.0 physical layer with integrated transceivers and endpoint buffers, and configurable digital logic blocks (PLD-based UDBs). System-level features include POR, LVD, watchdog, and multiple reset sources managed via dedicated registers.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8CTMG201-32LQXI, CY8C201A-32LQXI removes USB integration but retains identical touch performance and flash size, while CY8C21434-24LFXI trades USB and memory for smaller footprint and lower power-making each suitable only where those specific trade-offs align with system requirements.

Availability

CY8CTMG201-32LQXI is available at Aetrix Electronics and suitable for consumer electronics, industrial HMI, medical touch interfaces, and smart home control systems requiring stable component supply and long-term production continuity.

Supply support for CY8CTMG201-32LQXI 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) is a fabless semiconductor company specializing in programmable embedded solutions, USB controllers, and capacitive sensing technology.

CY8CTMG201 belongs to the PSoC 1 TrueTouch family, engineered specifically to integrate high-sensitivity capacitive touch sensing with USB connectivity and configurable mixed-signal peripherals in a single chip for human-interface applications.

FAQ

What is the maximum operating frequency of the M8C core in CY8CTMG201-32LQXI?

The M8C CPU core runs at up to 24 MHz when driven by the internal main oscillator (IMO) or an external crystal. Frequency scaling is controlled via the OSC_CR2 register, and higher frequencies require stable VDD ≥ 4.75 V per the TRM Section 7. The IMO is factory-trimmed to ±2% accuracy at 24 MHz and supports dynamic frequency adjustment through software-controlled dividers.

Does CY8CTMG201-32LQXI support mutual-capacitance touch sensing?

Yes, it supports both self- and mutual-capacitance sensing using dedicated analog resources: the I/O analog multiplexer (Section 12), dual comparators (Section 13), and sigma-delta modulator circuitry. Mutual-cap operation requires pairing P0 and P1 pins as transmitter/receiver channels, with timing and gain configured via TrueTouch-specific SFRs documented in TRM Section 11.

Can the USB interface operate without an external crystal?

Yes-the full-speed USB 2.0 PHY can use the internal 24 MHz IMO as its clock source, provided IMO calibration is performed at startup (via Calibrate0/Calibrate1 SROM functions). However, USB specification compliance requires ±0.25% clock accuracy, so factory-trimmed IMO or external crystal is recommended for production USB enumeration reliability.

How many TrueTouch sensors can be implemented simultaneously?

Up to 20 capacitive sensors can be scanned concurrently using the on-chip TrueTouch module: 8 channels via the analog multiplexer plus 12 additional electrodes enabled through GPIO reconfiguration and UDB-assisted scanning sequences. Maximum count depends on scan resolution, averaging depth, and interrupt latency constraints defined in TRM Section 11.3.