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CY7C63101 USB Microcontroller Technical Summary

Overview

The CY7C63101 is an 8-bit RISC-based One Time Programmable (OTP) microcontroller with an integrated USB serial interface engine. It belongs to the CY7C63xxx family of microcontrollers designed for low-speed USB peripheral applications. The device features a Harvard architecture with USB-optimized instruction set, making it ideal for Human Interface Devices (HID) such as mice, joysticks, and game controllers.

Key aspects of the CY7C63101 include:

• Integrated USB 1.5 Mbps transceiver compliant with USB 1.0 specification
• 12 MHz internal operation from 6 MHz external clock source
• 4K bytes of EPROM program memory
• 128 bytes of RAM
• Up to 16 general purpose I/O pins with interrupt capability

Features

USB Interface

• Compliant with USB 1.5 Mbps Specification, Version 1.0
• Supports HID 1.0 specification
• 1 device address with 2 endpoints (Endpoint 0 for control, Endpoint 1 for interrupt)
• Integrated USB transceivers

Microcontroller Core

• 8-bit RISC architecture with 35 USB-optimized instructions
• Harvard architecture with separate program and data memory
• 6 MHz external clock input (ceramic resonator or crystal) with internal 2x PLL for 12 MHz operation
• 128 bytes of internal RAM
• 4K bytes of EPROM program memory

I/O Capabilities

• Up to 16 general purpose I/O pins (Schmitt trigger inputs with internal pull-ups)
• 8 high-current I/O pins capable of driving LEDs directly
• Special purpose I/O mode for optical mouse applications
• Maskable interrupts on all I/O pins
• Controlled rise/fall times for reduced EMI

System Features

• 8-bit free-running timer
• Watchdog timer (WDT)
• Internal power-on reset (POR)
• Suspend mode with wake-up interrupt capability
• Operating voltage: 4.0V to 5.25V
• Operating temperature: 0°C to 70°C

Applications

The CY7C63101 is particularly suited for USB HID applications including:

• Computer mice and trackballs
• Joysticks and game controllers
• Keyboards and keypads
• USB-to-serial adapters
• Simple USB data acquisition devices
• Low-speed USB peripherals requiring minimal host interaction

Functional Description

Memory Organization

The CY7C63101 features separate program and data memory spaces:

• Program Memory: 4K bytes of EPROM organized as 2048 x 16 bits
• Data Memory: 128 bytes of RAM organized as 128 x 8 bits
• Security Fuse Bit: Protects program memory from reading

I/O Ports

The device features two I/O ports with different capabilities:

• Port 0: 8 low-current I/O pins with Schmitt trigger inputs and programmable pull-ups
• Port 1: 8 high-current I/O pins capable of driving LEDs directly (20mA sink capability)
• All I/O pins support interrupt generation on state change

USB Engine

The integrated USB engine handles all low-level USB protocol:

• Automatic handling of USB enumeration process
• Endpoint 0 for control transfers (64-byte buffer)
• Endpoint 1 for interrupt transfers (8-byte buffer)
• Automatic CRC generation and checking
• Automatic handling of USB bus reset

Interrupt System

The microcontroller features a flexible interrupt controller with:

• GPIO pin change interrupts
• USB interrupts (bus reset, transaction complete)
• Timer interrupt
• Wake-up interrupt from suspend mode
• Fixed priority interrupt vectoring

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (VCC): -0.5V to +6.0V
• Input Voltage (any pin): -0.5V to VCC +0.5V
• Operating Temperature: 0°C to 70°C
• Storage Temperature: -65°C to +150°C

DC Characteristics (VCC = 4.0V to 5.25V, TA = 0°C to 70°C)

• Supply Current (Active mode): 15mA typical at 12MHz
• Supply Current (Suspend mode): 500μA maximum
• Input High Voltage: 2.0V minimum
• Input Low Voltage: 0.8V maximum
• Output High Voltage (Port 0): VCC - 0.7V minimum
• Output Low Voltage (Port 1): 0.4V maximum at 8mA

Switching Characteristics

• Instruction Cycle Time: 333ns (3 clock cycles at 12MHz)
• USB Data Rate: 1.5Mbps ±0.25%
• Clock Input Frequency: 6MHz ±0.25%
• Reset Pulse Width: 100ns minimum

Package Information

The CY7C63101 is available in multiple package options:

• 24-pin SOIC (SC): Small Outline Integrated Circuit, 300mil width
• 24-pin Windowed CerDIP (WC): Ceramic Dual In-line Package with quartz window for UV erasure

Package dimensions and pinouts follow industry-standard configurations for each package type.

Ordering Information

The device is available in several variants:

• CY7C63100: 2K EPROM version
• CY7C63101: 4K EPROM version
• Suffixes indicate package type:
  • -SC: 24-pin SOIC
  • -WC: 24-pin Windowed CerDIP

``` This HTML document provides a comprehensive technical summary of the CY7C63101 USB microcontroller, organized into logical sections with proper heading hierarchy and detailed content. The summary covers all major aspects of the component including its features, applications, functional description, electrical characteristics, and package