Infineon Technologies CY8C20446A-24LQXIT

Overview

CY8C20446A-24LQXIT from Cypress Semiconductor is a PSoC® 1 mixed-signal array IC configured with the TS2000 Haptics User Module for tactile feedback generation in capacitive touch interfaces. It integrates two 16-bit timers (Timer0 and Timer2) to generate a ~23 kHz PWM output and 5-ms haptic update intervals, operates at up to 3.3 V, and supports up to 14 Immersion TouchSense 2000 haptic effects for ERM actuators in handheld consumer devices.

For engineers reviewing the CY8C20446A-24LQXIT datasheet, CY8C20446A-24LQXIT pinout, CY8C20446A-24LQXIT application, or CY8C20446A-24LQXIT equivalent, key selection criteria include supported actuator drive configuration (NRS-2574i or Z6DL2A017000B), firmware-based PWM/timer resource allocation, 5-ms effect update timing tolerance (±10%), and flash/RAM usage dependency on enabled effects (38–1753 bytes RAM, 15922 bytes flash).

Technical Context

The CY8C20446A-24LQXIT implements haptic feedback using two dedicated 16-bit timers: Timer_PWM generates ~23 kHz PWM output via ISR (~90 clock cycles at 24 MHz IMO), while Timer_TMR triggers haptic effect updates every 5 ms. Both timers operate in firmware mode-no hardware digital blocks are consumed for PWM or timing.

It requires precise FClock configuration (5.6–13 MHz) to satisfy FPWM_Output = FClock / 255 > 22 kHz and EffectUpdateDivider = (FClock / 50,000) − 1 ∈ [109, 255]. CPU remains fully available during effect playback; TS2000 ISR only executes while an effect is active.

Key Specifications

Pinout & Package

LQFP-24 package (7 × 7 mm, 0.5 mm pitch) with 16 general-purpose I/O pins, including dedicated routing for PWM output and amplifier enable signals. Pin assignment is user-configurable via PSoC Designer; no fixed pinout-function mapping depends on selected TS2000 configuration and port/pin parameters (e.g., PWM_Port/PWM_Pin, AmplifierEnable_Port/AmplifierEnable_Pin).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar haptics controller applications.

Compared with CY8C20446A-24LQXIT, CY8C20346H offers reduced CPU load at the cost of digital block usage, while CY8C22345H provides hardware-timed updates for stricter real-time assurance-both require different pin routing and PSoC Designer configuration workflows.

Availability

CY8C20446A-24LQXIT is available at Aetrix Electronics and suitable for smartphone touch interfaces, wearable fitness trackers, industrial handheld scanners, and medical patient monitor touch panels requiring stable component supply and long-term haptics firmware support.

Supply support for CY8C20446A-24LQXIT 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 programmable mixed-signal ICs for embedded control, combining configurable analog and digital blocks with microcontroller cores.

The CY8C20xx6A series delivers low-power, CapSense-optimized PSoC 1 devices targeting cost-sensitive human-interface applications requiring integrated haptics, touch sensing, and sensor signal conditioning.

FAQ

What actuator drive circuit is required for CY8C20446A-24LQXIT?

The device requires the TPA6205A amplifier driven from a 3.3-V supply, with PWM output routed to the amplifier's "–IN" input and a separate GPIO controlling the SHDN# pin. The recommended external components match those in the Immersion TS2000 reference schematics, and actuator selection (NRS-2574i or Z6DL2A017000B) must align with device mass per the External Component Selection Guidelines.

How does CPU loading behave during haptic playback?

CPU loading occurs only during active haptic playback and consists solely of two ISRs: Timer_PWM (~90 cycles at 24 MHz IMO) and Timer_TMR (5-ms interval). No CPU cycles are consumed when no effect is playing. The application firmware runs concurrently-no blocking or polling is required, and other ISRs remain fully responsive if properly prioritized.

Can CY8C20446A-24LQXIT support custom haptic waveforms beyond the 14 Immersion effects?

No-this device implements only the precompiled Immersion TouchSense 2000 Effect Library. Waveform data is stored in flash and accessed via TS2000_1_PlayEffect(BYTE *EffectData); custom waveform generation requires direct PWM register manipulation outside the TS2000 User Module, which voids timing guarantees and effect consistency.

What clock source and configuration ensure valid TS2000 operation?

A 24-MHz IMO is strongly recommended. FClock must be set between 5.6 MHz and 13 MHz (e.g., VC1=4 → 6 MHz). This ensures FPWM_Output > 22 kHz and EffectUpdateDivider ∈ [109, 255]. Deviations cause audible PWM noise or incorrect effect timing-validation requires verifying both equations in the TS2000 datasheet before finalizing firmware.