Infineon Technologies CY7C63813-SXC

Overview

CY7C63813-SXC from Cypress Semiconductor is an enCoRe™ II 8-bit flash microcontroller with integrated low-speed USB 2.0 and PS/2 interface, Harvard architecture M8C core running up to 24 MHz, 8 KB flash, 256 bytes RAM, crystalless internal oscillator (±1.5% accuracy), and dual-mode auto-configuration without external mode-switching components. It targets HID peripheral designs such as optical mice and gamepads.

For engineers reviewing the CY7C63813-SXC datasheet, CY7C63813-SXC pinout, CY7C63813-SXC application, or CY7C63813-SXC equivalent, key selection factors include its USB/PS/2 dual-mode auto-detection, integrated 3.3 V USB PHY regulator and D– pull-up, 20 GPIO with configurable 50 mA sink on designated pins, 12-bit programmable interval timer, and in-system reprogrammability via USB.

Technical Context

The device implements a dedicated low-speed USB Serial Interface Engine (SIE) compliant with USB 2.0 and HID 1.1, supporting one device address, one control endpoint (EP0), and two data endpoints (EP1, EP2). Its internal oscillator locks to USB timing during traffic, eliminating need for external crystal while maintaining ±1.5% accuracy at 24 MHz.

It features a dual-role I/O architecture: four GPIO ports (P0–P3), with P0/P1 individually configurable and P2/P3 group-configurable; four 3.3 V-tolerant I/O pins; SPI master/slave (up to 4 Mbps); two-channel 8-bit capture timers for RF edge timing; and a 16-bit free-running timer with rising/falling edge capture registers per input.

Key Specifications

Pinout & Package

Package: 24-pin SOIC (Small Outline Integrated Circuit), body width 3.9 mm, lead pitch 0.635 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-speed USB peripheral controller applications.

Compared with CY7C63812-SXC, CY7C63813-SXC provides six additional GPIO and 3.3 V I/O capability essential for optical sensor integration; versus CY7C63823-SXC, it offers SOIC packaging for easier prototyping and rework, with identical core functionality and timer/peripheral sets.

Availability

CY7C63813-SXC is available at Aetrix Electronics and suitable for optical mouse design, gaming peripheral development, and barcode scanner production requiring stable component supply and long-term manufacturing continuity.

Supply support for CY7C63813-SXC 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 U.S.-based semiconductor company specializing in programmable system-on-chip solutions, USB controllers, and mixed-signal ICs for embedded interfaces.

The enCoRe™ II product line was designed specifically for cost-sensitive, low-speed USB HID peripherals - integrating oscillator, regulators, pull-ups, and dual-mode logic to eliminate discrete timing and interface components.

FAQ

Does CY7C63813-SXC require an external crystal to operate in USB mode?

No. The device features a crystalless internal oscillator that automatically tunes to USB timing requirements (24 MHz ±1.5%) during active USB traffic. An external 12 MHz or 24 MHz clock may be used for higher precision, but is optional - no crystal or resonator is required for full USB compliance or enumeration.

Can CY7C63813-SXC operate as both USB and PS/2 device simultaneously?

No. It operates in either USB or PS/2 mode, but not concurrently. Mode selection is automatic based on host handshake: if USB traffic is detected first, it enters USB mode; if PS/2 clock/data signals appear before USB reset, it defaults to PS/2. No firmware or GPIO configuration is needed for mode detection.

What is the maximum sink current capability of GPIO pins on CY7C63813-SXC?

Standard GPIO pins provide 2 mA source and 2 mA sink. However, designated pins (P0.0–P0.3, P1.0–P1.3) support configurable sink strength: 8 mA or 50 mA per pin, selectable via register configuration. This enables direct driving of LEDs, small relays, or haptic actuators without external drivers.

Is in-system programming supported over USB without additional hardware?

Yes. The device includes a built-in USB bootloader that allows full flash reprogramming via standard USB HID class commands. No external programmer, debug header, or JTAG interface is required - firmware updates can be performed using only a USB cable and host-side utility software provided by Cypress.