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CY7C63000 USB Microcontroller Technical Summary

Overview

The CY7C63000 is an 8-bit RISC microcontroller with an integrated USB 1.5 Mbps serial interface engine, designed for low-speed USB peripheral applications. This cost-effective solution is optimized for Human Interface Devices (HID) such as mice, joysticks, and gamepads. The microcontroller features a Harvard architecture, 128 bytes of RAM, and 2KB of EPROM program memory (with 4KB available in the CY7C63001 variant).

Key aspects of the CY7C63000 include:

USB 1.0 compliant interface with 1.5 Mbps operation
12 MHz internal operation from 6 MHz external clock source
Up to 16 general purpose I/O pins with interrupt capability
Integrated USB transceivers and protocol engine
Low EMI output drivers

Features

USB Interface

Compliant with USB 1.5 Mbps Specification, Version 1.0
Compliant with USB HID Specification, Version 1.0
Supports 1 device address and 2 endpoints
Integrated USB transceivers
Automatic USB enumeration process

Microcontroller Core

8-bit RISC architecture with 35 USB-optimized instructions
Harvard architecture with separate program and data memory
6 MHz external clock (ceramic resonator or crystal) doubled to 12 MHz internally
128 bytes of RAM
2KB EPROM (4KB in CY7C63001 variant)

I/O Capabilities

Up to 16 Schmitt trigger I/O pins with internal pull-up
Up to 8 I/O pins with LED drive capability (high current)
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 instant-on wake-up
Operating voltage: 4.0V to 5.25V
Operating temperature: 0°C to 70°C

Applications

The CY7C63000 is ideal for USB-connected human interface devices and other low-speed peripherals:

Computer mice and trackballs
Joysticks and game controllers
Keyboards and keypads
USB-connected sensors
Simple data acquisition devices
Low-speed control interfaces

Electrical Characteristics

Absolute Maximum Ratings

Supply voltage (VCC): -0.5V to +7.0V
Input voltage on 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): 15 mA typical
Supply current (suspend mode): 500 μA maximum
Input high voltage: 2.0V minimum
Input low voltage: 0.8V maximum
Output high voltage (Ioh = -3 mA): 2.4V minimum
Output low voltage (Iol = 3 mA): 0.4V maximum
USB D+ and D- line capacitance: 20 pF maximum

Switching Characteristics

Clock frequency: 6 MHz ±0.25%
USB data rate: 1.5 Mbps ±0.25%
USB signal rise/fall time: 75 ns to 300 ns
Timer clock frequency: 46.875 kHz (12 MHz/256)

Package Information

The CY7C63000 is available in multiple package options:

18-pin PDIP (CY7C63200/CY7C63201)
20-pin PDIP (CY7C63000/CY7C63001)
20-pin SOIC (CY7C63000/CY7C63001)
24-pin SOIC (CY7C63100/CY7C63101)

Windowed CerDIP packages are also available for development:

18-pin Windowed CerDIP (CY7C63200/CY7C63201)
20-pin Windowed CerDIP (CY7C63000/CY7C63001)
24-pin Windowed CerDIP (CY7C63100/CY7C63101)

Functional Description

Memory Organization

The CY7C63000 features separate program and data memory spaces (Harvard architecture):

Program Memory: 2KB EPROM (000h-7FFh) with optional security fuse
Data Memory: 128 bytes RAM (00h-7Fh) and I/O registers (80h-FFh)

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 pull-ups
Port 1: 4-8 high-current I/O pins capable of driving LEDs directly

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
USB bus reset detection

Interrupt System

The microcontroller features a flexible interrupt system:

Global interrupt enable/disable control
Individual interrupt sources:
- GPIO pin changes
- USB events
- Timer overflow
- Wake-up from suspend
Fixed priority interrupt vectoring