national semiconductor USBN9603/USBN9604 Universal Serial Bus Full Speed Node Controller with Enhanced DMA Support handbook

About this manual

The document describes the USBN9602, an integrated USB Node controller compatible with the USB Specification Version 1.0. The device integrates a USB transceiver with a 3.3V regulator, Media Access Controller (MAC), endpoint FIFOs, and interfaces including an 8-bit parallel interface and MICROWIRE/PLUS™ Interface.

What's inside

• General Description
• Features
• Device Overview
• Transceiver
• Voltage Regulator
• Serial Interface Engine
• Endpoint Operation
• DMA Support
• Register Set
• Electrical Characteristics

Specifications

Frequently asked questions

What voltage range is required for the external resistor on D+ to indicate a high-speed node?

An external resistor tied to a voltage source between 3.0V and 3.6V referenced to local ground is required.

What type of capacitor must be used to decouple the 3.3V output?

The output must be decoupled with a 10 uF tantalum capacitor to ground.

What frequency crystal or oscillator is required for the clock recovery block?

The input clock must be derived from a crystal or crystal oscillator at 48 MHz.