CY7C63101C-QXC

Application Specific Microcontrollers Overview

The CY7C63101C-QXC is a low-cost, 8-bit RISC One-Time Programmable (OTP) microcontroller designed for low-speed USB peripherals. It integrates a 1.5 Mbps USB Serial Interface Engine (SIE), transceiver, and an M8C CPU operating at 12 MHz derived from a 6 MHz external ceramic resonator. The device features 4 Kbytes of EPROM, 128 bytes of RAM, and sixteen Schmitt trigger I/O pins with programmable sink current levels. Operating within a 4.0V to 5.25V voltage range and 0°C to 70°C temperature scope, it supports Instant-On Now™ suspend modes and includes internal power-on reset and watchdog timer functions.

Application Specific Microcontrollers Feature Summary

• USB 1.1 Specification compliance supporting 1 device address and 2 endpoints (1 control, 1 data).
• 8-bit RISC microcontroller with Harvard architecture, 35 instructions, and 12 MHz internal clock.
• Integrated memory comprising 4 Kbytes EPROM and 128 bytes RAM with dedicated USB FIFOs.
• Sixteen GPIO pins with configurable pull-ups and programmable sink current levels for LED drive.

Application Specific Microcontrollers Applications

• Low-speed USB mice
• Joysticks
• Gamepads

Application Specific Microcontrollers Procurement Notes

Verify the -QXC suffix corresponds to the 24-pin QSOP package containing sixteen GPIOs. Confirm the 'C' variant meets the 0°C to 70°C commercial temperature range and 4.0V–5.25V supply requirements. Ensure firmware compatibility with the OTP EPROM architecture and security fuse bit protection mechanisms.

Application Specific Microcontrollers Selection Notes

Select the CY7C63101C over the CY7C63001C when sixteen general-purpose I/O lines are required, as the latter provides only twelve. This component is suitable for applications needing integrated USB transceivers without external crystals, utilizing a 6 MHz ceramic resonator. Consider the 24-pin QSOP package constraints for PCB layout and thermal management within the specified operating temperature range.

Application Specific Microcontrollers Part Context

This part belongs to the Cypress Semiconductor CY7C630/101C family of USB microcontrollers, later acquired by Infineon Technologies. These devices were engineered specifically for human-interface computer peripherals requiring cost-effective, self-contained USB connectivity solutions with minimal external component counts.

Application Specific Microcontrollers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should evaluate pin-compatible alternatives or re-design based on the specific 24-pin QSOP footprint and OTP programming requirements.

Application Specific Microcontrollers FAQ

How is the microcontroller clock generated?

The device uses a 6 MHz external ceramic resonator connected to XTALIN and XTALOUT pins. An internal clock doubler converts this signal to a 12 MHz clock for the microprocessor.

What is the function of the CEXT pin?

The CEXT pin serves as an open-drain output with a Schmitt trigger input. It can be connected to an external RC circuit to generate periodic wake-up interrupts from Suspend mode for lowest power consumption.

How does the device handle resets?

The controller supports Power-On Reset (POR), Watch Dog Reset (WDR), and USB Bus Reset. The Status and Control Register at I/O address 0xFF records the cause of the last reset via specific bits.