Functional Overview
The CY7C63xxx is a family of 8-bit RISC One Time Programmable (OTP) microcontrollers with a built-in 1.5-Mbps USB serial interface engine. The microcontroller features 35 instructions which are optimized for USB applications. There is 128 bytes of onboard RAM available incorporated into each microcontroller. The Cypress USB Controller accepts a 6 MHz ceramic resonator or a 6 MHz crystal as its clock source. This clock is doubled within the chip to provide a 12 MHz clock for the microprocessor.

Features
• Low-cost solution for low-speed USB peripherals
   such as mouse, joystick, and gamepad
• USB Specification Compliance
   — Conforms to USB 1.5 Mbps Specification, Version 1.0
   — Conforms to USB HID Specification, Version 1.0
   — Supports 1 device address and 2 endpoints
• 8-bit RISC microcontroller
   — Harvard architecture
   — 6 MHz external ceramic resonator or clock crystal
   — 12 MHz internal operation
   — USB optimized instruction set
• Internal memory
   — 128 bytes of RAM
   — 2K bytes of EPROM (CY7C63000, CY7C63100, CY7C63200)
   — 4K bytes of EPROM (CY7C63001, CY7C63101, CY7C63201)
• I/O ports
   — Integrated USB transceivers
   — Up to 16 Schmitt trigger I/O pins with internal pull-up
   — Up to 8 I/O pins with LED drive capability
   — Special purpose I/O mode supports optimization
      of photo transistor and LED in mouse application
   — Maskable Interrupts on all I/O pins
• 8-bit free-running timer
• Watchdog timer (WDT)
• Internal power-on reset (POR)
• Improved output drivers to reduce EMI
• Operating voltage from 4.0V to 5.25VDC
• Operating temperature from 0 to 70 degree Celsius
• Available in space saving and low cost 18-pin PDIP,
   20-pin PDIP, 20-pin SOIC, and 24-pin SOIC packages
• Windowed packages also available to support program
   development: 18, 20, and 24-pin Windowed CerDIP
• Industry standard programmer support