CY7C63221A-PXC

Overview

The CY7C63221A-PXC is a low-speed USB peripheral controller from Cypress Semiconductor, part of the enCoRe™ USB family. It integrates an 8-bit RISC microcontroller with 3 Kbytes of EPROM and 96 bytes of RAM. The device features an internal oscillator eliminating external crystals, auto-configuring between USB and PS/2 modes without GPIO intervention. It supports one USB device address, one control endpoint, and one data endpoint, compliant with USB Specification Version 2.0 and HID Specification Version 1.1. Operating voltage ranges from 4.0V to 5.5VDC.

Feature Summary

• Internal oscillator eliminates need for external crystal or resonator
• Auto-configures between USB and PS/2 modes without external components
• Integrated 3.3V regulator for USB pull-up resistor
• Up to 10 configurable GPIO pins with 50 mA/pin sink capability

Applications

• Mice
• Gamepads
• Joysticks

Procurement Notes

Verify package type availability as the component is offered in DIE form, 16-pin PDIP, 18-pin SOIC, and 18-pin PDIP. Confirm that the specific ordering suffix matches the required physical package for the design. Ensure firmware compatibility with the Harvard architecture and instruction set optimized for USB and PS/2 operations.

Selection Notes

Select this controller for applications requiring minimal external components due to its integrated oscillator and regulator. Consider the 3 Kbytes of EPROM and 96 bytes of RAM for memory constraints. The device supports maskable interrupts and a watchdog timer, suitable for robust embedded control. Verify operating temperature range requirements against the specified 0 to 70 degrees Celsius.

Part Context

This component belongs to the enCoRe™ USB family, designed for enhanced component reduction in low-speed USB applications. It serves as a cost-effective solution for devices combining PS/2 and USB interfaces. The family includes variants like the CY7C63231A, sharing similar core functionalities but potentially differing in pin counts or specific I/O configurations.

Replacement Considerations

The CY7C63231A-PXC is a similar part within the same family. Verify pinout compatibility and memory specifications before substitution. Other low-speed USB controllers may require additional external components for oscillator and regulation functions.