at43320 ATMEL Corporation, at43320 Datasheet

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at43320

Manufacturer Part Number
at43320
Description
Full-speed Usb Hub/function Microcontroller
Manufacturer
ATMEL Corporation
Datasheet

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Part Number
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Part Number:
at43320-AC
Manufacturer:
Atmel
Quantity:
10 000
Features
Overview
The Atmel AT43320 is a microcontroller-based USB hub with an embedded function.
The USB hub has five downstream ports, one of which is permanently attached. Inter-
nally the AT43320 consists of a USB hub and function interface, a hub repeater, and a
high-performance, efficient 8-bit RISC microcontroller. The hub and peripheral device
controller function is implemented in the microcontroller’s firmware. To the USB host,
the embedded function appears as an attached port of the hub with its own device
address and endpoints. The AT43320 can also be configured as a USB function with-
out the hub.
The USB hardware block consists of a USB transceiver, SIE, hub repeater, endpoint
controllers, and an interface to the microcontroller. The USB hardware interfaces to
the USB host at the transaction level. The CPU of the microcontroller is based on the
Atmel AVR microcontroller and is capable of addressing up to 128K bytes of external
program memory. The AVR architecture was developed to be programmed in C effi-
ciently and with maximum performance.
AVR
One Upstream Port Plus Four External and One Attached Downstream Ports
USB Hub with Two Endpoints
Embedded USB Function with 3 Endpoints
32 Programmable I/O Port Pins
High-performance and Low-power AVR RISC Microcontroller
120 Powerful Instructions – Most with 83 ns Execution Cycle Times
128K Bytes Program Memory Address Range
512 Bytes Internal SRAM
32 x 8 General-purpose Working Registers
Programmable UART and SPI Serial Interface
One 8-bit Timer/Counter with Separate Prescaler
One 16-bit Timer/Counter with Separate Prescaler
External and Internal Interrupt Sources
Programmable Watchdog Timer
Low-power Idle and Power-down Modes
Programmable 6/12 MHz Oscillator with PLL
On-chip 3.3V Power Supply
100-pin LQFP Package
®
Microcontroller-based USB Hub and Function Controller
Full-speed USB
Hub/Function
Microcontroller
AT43320
Rev. 1443A–08/99
1

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at43320 Summary of contents

Page 1

... The Atmel AT43320 is a microcontroller-based USB hub with an embedded function. The USB hub has five downstream ports, one of which is permanently attached. Inter- nally the AT43320 consists of a USB hub and function interface, a hub repeater, and a high-performance, efficient 8-bit RISC microcontroller. The hub and peripheral device controller function is implemented in the microcontroller’ ...

Page 2

... Figure 1. AT43320 Block Diagram MICROCONTROLLER IO PORTS AT43320 2 UPSTREAM USB PORT SIE AND HUB ENDPOINT REPEATER CONTROL 3 ENDPOINT USER DEFINED USB FUCTION AVR MICROCONTOLLER EXTERNAL FLASH/EPROM DOWN STREAM USB PORTS ...

Page 3

... Development Support The AT43320 uses the same program and development tools as the Atmel AVR microcontrollers including: C com- pilers, macro assemblers, program debuggers/simulators, Figure 2. Hub/Monitor/IR Chip Application REMOTE IR IR XCVR UNIT in-circuit emulators. A USB development is also available including firmware source code for the most common USB applications ...

Page 4

... Atmel Corporation 1999. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard war- ranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein ...

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