Full-speed Hub/Function Microcontroller AT43USB321 Overview

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Full-speed Hub/Function Microcontroller AT43USB321 Overview

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8-bit AVR® Core with Instruction Cycle Time Bytes Program Memory Bytes SRAM General Purpose Working Registers Programmable Port Pins Programmable Serial UART Serial Interface 8-bit Timer/Counter with Separate Prescaler 16-bit Timer/Counter with Separate Prescaler External Internal Interrupt Sources Programmable Watchdog Timer with On-chip Oscillator Bus-or Self-powered with Four Downstream Ports Attached Function Port with Three Endpoints Programmable 6/12 Oscillator with On-chip 3.3V Supply 42-pin SDIP 48-lead TQFP Packages
Full-speed Hub/Function Microcontroller AT43USB321
Overview
Atmel AT43USB321 single-chip microcontroller based with embedded function byte masked ROM. five downstream ports, which permanently attached. Internally AT43320 consists function interface, repeater, high-performance, efficient 8-bit RISC microcontroller. peripheral device controller function implemented microcontoller's firmware. host, embedded function appears attached port with device address endpoints. AT43USB321 also configured function without hub. hardware block consists transceiver, SIE, repeater, endpoint controllers, interface microcontroller. hardware interfaces host transaction level. microcontroller based Atmel microcontroller. architecture developed programmed efficiently with maximum performance.
Rev. 1442A-08/99
Figure AT43USB321 Block Diagram
OSC1 OSC2 6/12M
PORT4
SERIAL INTERFACE ENGINE
PORT3
PA[0:7] PB[0:7] REPEATER
PORT2 DEVICE CONTROLLER
PD0/RXD PD1/TXD PD2/INT0 PD3/INT1
PORT1
CEXT GENERAL PURPOSE
Development Support
AT4USB321 uses same program development tools Atmel microcontrollers including: compilers, macro assemblers, program debuggers/simulators, in-circuit emulators. AT43USB321 binary compatible with AT43320 share same development kit, which includes firmware source code most common applications.
grammable from four. self-powered bus-powered. most cases, hubs monitors will self-powered because readily availability power supply more versatility. this example, AT43USB321 interfaces monitor's microcontroller, host microcontroller, through serial that supports communications such DDC2Bi. firmware inside AT43USB321 acts translator between host system host microcontroller. This function performed without modification host microcontroller's firmware resulting very flexible adding capability monitor. receiver function also implemented firmware also support consumer type protocol that uses frequency range kHz.
Applications
attached diagram shows application AT43USB321 monitor with embedded functions: monitor display controller receiver. number external downstream ports pro-
AT43USB321
AT43USB321
Figure Hub/Monitor/IR Chip Application
HUB/MONITOR/IR CHIP /UART
MONITOR
REMOTE UNIT
XCVR
XCVR
UPSTREAM PORT DOWNSTREAM PORTS
HOST DEVICES
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Atmel Corporation 1999. Atmel Corporation makes warranty products, other than those expressly contained Company's standard warranty which detailed Atmel's Terms Conditions located Company's site. Company assumes responsibility errors which appear this document, reserves right change devices specifications detailed herein time without notice, does make commitment update information contained herein. licenses patents other intellectual property Atmel granted Company connection with sale Atmel products, expressly implication. Atmel's products authorized critical components life support devices systems. Marks bearing
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1442A-08/99/xM
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Full-speed Hub/Function Microcontroller AT43USB321 Overview

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