Infineon Technologies CY8C20346A-24LQXIT

Overview

CY8C20346A-24LQXIT from Cypress Semiconductor is a PSoC® 1 mixed-signal array IC configured with the TS2000 Haptics User Module for tactile feedback generation. It implements Immersion TouchSense 2000 haptic effects using two 16-bit timers (Timer0 and Timer2), supports up to 14 programmable vibration effects, operates at 3.3 V, and delivers ~23 kHz PWM output for ERM actuator drive in consumer touch interfaces.

For engineers reviewing the CY8C20346A-24LQXIT datasheet, CY8C20346A-24LQXIT pinout, CY8C20346A-24LQXIT application, or CY8C20346A-24LQXIT equivalent, key selection criteria include timer-based haptic update timing (5 ms intervals), firmware-driven PWM generation, actuator enable signal routing, flash/RAM usage trade-offs per enabled effect, and compatibility with Sanyo NRS-2574i or Jinlong Z6DL2A017000B actuators.

Technical Context

The CY8C20346A-24LQXIT implements haptic feedback via firmware-managed dual-timer architecture: Timer_PWM generates ~23 kHz PWM output (FClock/255) with ~90-cycle ISR duration, while Timer_TMR provides precise 5-ms haptic effect update intervals. Both timers operate from IMO clock (recommended 24 MHz).

It requires external actuator drive circuitry (e.g., TPA6205A amplifier), uses dedicated GPIO pins for PWM output and SHDN# control, and supports direct or polled update methods - with no hardware PWM block usage, distinguishing it from CY8C22x45H variants.

Key Specifications

Pinout & Package

LQFP-24 package (7 × 7 mm, 0.4 mm pitch) with 20 I/O pins; pin functions assigned dynamically via PSoC Designer configuration - no fixed pin-to-function mapping. Critical user-configurable terminals include PWM output (e.g., P0[0]–P0[7], P1[2]–P1[7], P2[0]–P2[3]), amplifier enable (SHDN#, e.g., P0[0]–P0[7]), and I²C interface (P1[0]/P1[1] reserved, not recommended for haptics).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C20346A-24LQXIT, CY8C22345H reduces CPU loading via hardware PWM but increases silicon resource consumption, while DRV2605L eliminates MCU dependency entirely but forfeits tight CapSense-haptics integration and firmware-level effect customization.

Availability

CY8C20346A-24LQXIT is available at Aetrix Electronics and suitable for smartphone touch UI feedback, wearable device button simulation, and industrial HMI touch panels requiring stable component supply and long-term PSoC 1 platform support.

Supply support for CY8C20346A-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 arrays for embedded control, combining configurable analog and digital blocks with industry-standard microcontroller cores.

The CY8C20xx6A series targets cost-sensitive, low-power capacitive sensing applications with integrated haptics, emphasizing seamless CapSense–TS2000 co-design for touch interface systems.

FAQ

What is the minimum required IMO clock frequency for stable TS2000 operation on CY8C20346A-24LQXIT?

The minimum valid FClock is 5.6 MHz, derived from the requirement that FPWM_Output = FClock/255 ≥ 22 kHz. At 5.6 MHz, PWM output is 21.96 kHz - just within specification. Cypress recommends 24 MHz IMO with VC1=4 (6 MHz FClock) for margin and consistent 5-ms timing accuracy across temperature and voltage.

Can CY8C20346A-24LQXIT drive an LRA (Linear Resonant Actuator) instead of an ERM?

No - the TS2000 User Module firmware and timing parameters (5-ms update, 23-kHz PWM) are characterized exclusively for Eccentric Rotating Motors (ERM) like the NRS-2574i and Z6DL2A017000B. LRAs require resonant-frequency-matched drive signals (typically 150–300 Hz sine wave), which this implementation does not generate.

How does disabling unused haptic effects impact runtime RAM usage?

Disabling effects reduces static RAM allocation for effect parameter buffers and lookup tables. For example, disabling all but one effect cuts RAM usage from ~1800 bytes to ~43 bytes - confirmed in AN2397 test reports. Dynamic RAM (stack) remains unaffected, as ISR overhead is fixed regardless of effect count.

Is P1[0]/P1[1] usable for haptic PWM output on CY8C20346A-24LQXIT?

No - P1[0] and P1[1] are hardwired to I²C functionality in the CY8C20xx6A family and are explicitly reserved. Using them for PWM causes bus contention and unpredictable behavior. Valid PWM pins include P0[0]–P0[7], P1[2]–P1[7], and P2[0]–P2[3], as defined in the PSoC Designer pin assignment tool.