AT43320-AC
AT43320-AC Datasheet
AT43320
| Part | Datasheet |
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AT43320-AC |
AT43320-AC (pdf) |
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| • Microcontroller-based USB Hub and Function Controller • 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 Full-speed USB Hub/Function Microcontroller AT43320 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. Internally 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 without 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 efficiently and with maximum performance. Figure AT43320 Block Diagram MICROCONTROLLER IO PORTS UPSTREAM USB PORT SIE AND ENDPOINT CONTROL HUB REPEATER DOWN STREAM USB PORTS 3 ENDPOINT USER DEFINED USB FUCTION AVR MICROCONTOLLER EXTERNAL FLASH/EPROM AT43320 AT43320 Development Support The AT43320 uses the same program and development tools as the Atmel AVR microcontrollers including C compilers, macro assemblers, program debuggers/simulators, in-circuit emulators. A USB development is also available including firmware source code for the most common USB applications. Figure Hub/Monitor/IR Chip Application HUB/MONITOR/IR CHIP I 2C/UART MONITOR µC REMOTE IR UNIT IR XCVR IR XCVR DOWNSTREAM PORTS UPSTREAM PORT TO USB DEVICES TO USB HOST Atmel Headquarters Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 408 441-0311 FAX 408 487-2600 Europe Atmel U.K., Ltd. Coliseum Business Centre Riverside Way Camberley, Surrey GU15 3YL England TEL 44 1276-686-677 FAX 44 1276-686-697 Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL 852 2721-9778 FAX 852 2722-1369 Japan Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL 81 3-3523-3551 FAX 81 3-3523-7581 Atmel Operations Atmel Colorado Springs 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 719 576-3300 FAX 719 540-1759 Atmel Rousset Zone Industrielle 13106 Rousset Cedex France TEL 33 4-4253-6000 FAX 33 4-4253-6001 Fax-on-Demand North America 1- 800 292-8635 International 1- 408 441-0732 |
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